cameras can be added to the wingtips as well. making eh gemini a pusher would put the props in turbulent air, and cause vibrations, but would work. similar to the piaggio avanti aircraft, they have unique noise profile, if you have ever heard one. that noise is the pressure differential from the wing hitting the props. i don't consider it a good thing, but it could be done.
i know that sound!! i fell in love with it's design, a few occasionally fly out of my airport where i work. i thought the noise was caused by the exhaust hitting the props.
it would fly the furthest at a relatively high altitude, without descending, because the air is thinner, and travel through it is more efficient. This is the strategy behind commercial air flights, and the reason they expend extra fuel to get to their cruising altitude. at sea level, the theoretical max distance is 120 km, with the 3kg battery pack, in stock configuration.
I really like watching these kind of videos. I use fly weight shift ultralight trikes, but I can't afford it anymore. So this is the next best thing. I disabled & was wonder how much a basic setup like yours would cost. I would really like to purchase to purchase a glider, & perhaps make it solar powered to help make the battery life longer.
Wow what an awesome aircraft! I like that's its the controls are kept simple, as ailerons are just not necessary for an airplane built for this purpose.
Brilliant ideas...can the avionics autopilot ,tvtrans.engines ,esc,batteries etc.. defeat high weather tempreture of more than 40 centigrades working for more than 4hrs on 1000meters altitude ?
+Salih Mehdi temperatures get less at higher altitudes, not more. so, no problem, just need insulation for extreme altitudes, and extreme low temperatures. At these altitudes, it is not a problem. it would be interesting to add an outside air temperature sensor to the plane, however. also a barometric sensor, so sense density altitude. alternately, airspeed could be compared with average groundspeed.
Any thoughts on putting the newer super-thin and light solar cells on the upper wing surfaces? There are single engine planes already on solar with sustaining battery life- they never run out. You could at least significantly increase duration this way...
I've seen two approaches to high altitude, using lift and climbing relativily slow, and climbing very fast. still not sure which is the best, but the fast method does not need a very big plane.. ha ha. sounds like your ranger would be somewhere in the middle. Looking forward to seeing it. What equip are you running?
On next flight can you mount one camera with no-distortion lens? Seems every go-pro or any other camera has wide-angle or fish-eye lens. Curious what horizon looks like in high altitude. Amazing work.
+Mark K from this altitude, no curvature is visible, if that's what you mean. i'll consider using some different settings on the go pro, as they have narrow field of view setting, which makes them look like a normal camera. thanks for your input!
+FPVREVIEWS Amazing what you can build and how high you can fly it. "... from this altitude, no curvature is visible..." Now I'm confused more than ever before. Thank you for your response.
+Mark K airliners fly about 2-3 times that high, and from them, you can't see the curvature, really very well. i think it's not clearly visible until something like 40-50 thousand feet, but i could be mistaken. i'm sure google or wiki would have some info.
+FPVREVIEWS here is something i found from an airline pilot: "From a friend who was a military pilot, and from sources such as the many books I have read on the SR-71 and U-2 it can be said that this doesn't appear until you get up to 55K-60K feet........ The highest I have been is 41K on a 777 and I couldn't see anything but a flat horizon." sounds like we need a better airplane, i will start designing it... LOL
+FPVREVIEWS Long story short friend of mine (deep thinker and thinks way too much) told me we live on FLAT EARTH. I laughed in his face and said few things. He challenged me to prove him wrong and I can't use NASA pics or any other pics using wide-angle or fish-eye lens. He said I will never see curvature with my own eyes because there is none. With Earth's size and mathematical formula we should see curvature when looking at horizon from high altitude. At 4k to 5k feet high we should see curvature and 20k feet high curvature should be obvious. More I research this more questions I have. WTF.
no concern. The area which we fly is a bit of a dead zone for air traffic between 100ft AGL and 20,000. we do monitor carefully for low level traffic. it's near an airport. this was also made before the regulations in our country.
Um, no. at the relative speeds that our uav's travel, it would be fairly useless anyway, as we are not fast enough to get out of the way of all but the slowest manned aircraft. I think the key will be to make an aircraft which can climb vertically or descend vertically at a very high rate of climb, and in a efficient manner, also controlled, and safe. a hard problem, but one that tilt rotors and reversible/variable pitch thrust can solve. much better to use a system of shared V2V communication to share position and heading/speed date, i think. the automotive industry will probably provide a working solution there. it'll all come together, but will take some time, and there will be ranting and raving in the meantime. also bans, and arrests. basically, lots of hysteria. Sad.
FPVREVIEWS. I would say the question still stands. And I want it, or at least a form awareness. To avoid each other or simply know there is a jet three miles out and five miles up. Especially, because we can't say we won't continually push our limits. There are apps on my phone that allow me to see commercial planes and where they are in the sky in live feed. Tapping into data already available, and/or uploading our own location actively or indicating it passively. As I push the limits, I feel at least being able to transmit out something other aircraft can pick up would be easiest. Seems like if commercial aircraft tapped into our video out they could avoid us at least. Using a simple algorithm of the signal strength a manned aircraft can workout location, direction and speed. I Just have to imagine it is cheaper to pay engineers of the F35 and they have worked out how to avoid all objects in the sky vs the cost of repair or crash. I also hope their method of avoid is not to shoot us down. Ha ha
transponders are the current way of keeping traffic separation. as well as ADSB. This si a technical challenge, but a solvable one, and V2V communication, as i mentioned already exists, at least in working prototypes. Hard part about any of this tech is getting the government to approve it. V2V will be the first as it will make the roads safer pretty much immediately, so it's hard, and unpopular for the gov. to drag their feet on the implementation.
FPVREVIEWS. I will look into that tech. Certainly curious about size and weight possibilities. A lot of work for good reasons. yes, to be continued/stretched out.
Nice flight! If you are planning to fly with no power on a regular basis, I recommend you look to set the speed controllers up to brake the motors and stop the props freewheeling. This would reduce the drag significantly.
yes, you are absolutely correct, but if you notice, I actually put the plane in a slight dive, to bleed off altitude, as a glide for that height could take over an hour. so i actually wanted the extra drag. you could get a longer flight time with the brake on for sure.
My answer wasn't entirely right,i had forgotten about parasitic drag on a freewheeling prop. The answer is,for a given prop with a given pitch and given length, whether or not one should leave it freewheeling depends on the gliding speed. Here is a paper with test data i found: www.peter2000.co.uk/aviation/misc/prop.pdf Anyway a collapsing prop is the best solution :)
This plane will never stop impressing me. I wish that I got this instead of the skyhunter, but maybe Ill buy this next time. You are so high and the scenery looks so different than in America. In what country do you live, because it is so beautiful there.
+daniel perkins Mexico. thanks for the compliments. it's nice weaterh here, but not worth the trouble. living here is not easy. better off in U.S. overall.
after watching this video again, I'm kinda surprised that you don't have the brake enabled on the esc's. Wouldn't enabling the esc brake, therefore stopping the propellers from spinning, reduce drag from the freewheeling props?
Nope,as the blades spin freely the drag is reduced compared to being still,u can figure this out considering when spinning,from the blade's frame of reference,the air is moving at angle closer to the chord of the blade. If you can minimize internal friction of the shaft this rotation speed increases to the point of 0 drag and you can have a glider that doesn't need to collapse its prop.
Yes, stopping the props would make it glide better. You can test by trying to autorotate your heli with and without the blades spinning and see which one comes down faster.
during autorotation the blades already have built in inertiawhich can produce lift when you turn up the pitch. however my answer isn't completely right. parasitic drag plays its role for a freewheeling propeller. i found a paper with test data.: www.peter2000.co.uk/aviation/misc/prop.pdf
+Jörn Beyse the original design spec was for 20 000 minimum, and to carry a full size DSLR to 10 000 and keep it there for 1 hr. or similar atmospheric sampling payload. i have not fully tested, but i believe both are achievable with the standard airplane.
this plane can be a spoting plane for arty and correct firing for them + what the range of this plane ? pretty nice plane you made there and sorry for my bad english
+OLEG69M there was still about 15% of the battery remaining. I have the ESC's set up to free-wheel, or turn freely, as it makes more drag, which helps to descend, and helps a little to flatten the glide slope for landing.
+OLEG69M the climb is with the motors running. the glide is with the motors not running. I shut them off, to keep a reserve of electrical power, in case i have to abort a landing, divert, or need power to get back to the landing zone.
+Barrett Powell The FAA is a rouge agency, acting directly agains it's congressional mandate. fly safe. you're not a real threat. don't let them brainwash you.
I cant believe everyone went along and registered there model aircraft. Now they have funds to create more authority. Just wait. Ten years to register it will be thousand dollars and have to pay yearly taxes on our drones, force us to get a licence insurance.
What type of onboard oxygen system did you use to keep the pilot from passing out? Oh, never mind, you probably had a pressurized pilot compartment to handle all that pressure change. :)
+victor chakmakian if you have a HAM license you can fly almost wherever you like, although you should make aware any near airports of your flight, and have reflective antennas that make you stand out on radars. gay isn't it.
Wouldn't the air there be incredibly cold and take a toll on the battery and control surface? I've seen high altitude pilots struggle with frozen servos before.
I asked on another video this may be a stupid question but could you extend the range of your transmitter by attaching antenna to something like say a balloon or a kite or maybe even a pole.. something that could go up pretty high to extend the range?
yes, that would absolutely be a possibility. if you need the range for RF. lately, we're focusing mostly on full autonomy, which is even better for most applications, because the aircraft no longer needs to be in range to perform it's mission. There are circumstances which would require operator input, such as for certain types of decision making, but mostly, it can be eliminated, or compensated for my flying more auto missions, which costs almost nothing, and requires no operator for the majority of the flight.
@@FPVREVIEWS basically autopilot very interesting but what application would you use that for I can see for like deliveries/geography or whatever, but just for hobbyist based applications as in having fun lol it would be exciting to know your RC can fly itself back and forth but that would take the fun out of it after a while. I would like to see how high I could get without the use of drugs lol But seriously I would just like to see how I could get and take photos Or just say I did it You know what would be cool to build your own V2 but instead of going fast go real slow so slow that they won't be able to shoot you down because their rockets are too fast hahaha
@@earlyculyer4103 Even with the autonomous systems, you can take various degrees of control, including full manual, and have that RX failsafe option. so it all depends at that point, what is the range of your control, and video systems. fun stuff. I hope nobody shoots at my planes. they are a lot of work to build, and not cheap.. :)
Sjoerd Postma large air traffic in our area is extremely rare, and is over 25 000 feet. smaller air traffic is almost always at very low altitudes in our area, under 1000 ft, and talking to ATC, so we can listen.
FPVREVIEWS Thank you for your answer. I live in the north of The Netherlands, where the sky is congested with all kinds of air traffic (VFR, IFR and military) All in a tiny airspace. Rules for fpv are also very strict and making a flight like you did is next to impossible for us. I really enjoy your video's and maybe, one day, we can build a Gemini and make our own video :))
Thanks 4 yr quick answer..here in Iraq we suffer high temp. weather since the end of April till the end of September..as u know temp. decreases about 6.5C each 1000meter higher..so in June ,July ,Augest & Sep. temp. at surface is 55-45C ...& that causes many electrical failure in the uavs..even the US troops got problems in using the RQ11 Raven ..as i read..any how i`m thinking of puchasing one..
yes, it would help, but for this flight, we were actually in a slight dive, and trying to bleed off kinetic energy to get back down more quickly. it would be nice to have options, though.
And what kind speed controller did you use for your plane gets more strong give the brushless spins super faster and what kind propellers did you use can you give me a links please
Hi FPV review, I really like the Gemini version 2 and have looked at the available blue print plans to build. I have builded aircraft from a kit. Just not sure I can build the Gemini from your plans . Do not know if I have enough know how to build. wish I had hands on or a very good video to go on, thank you. what do you suggest.
+Coolwater Hubby watch the build video,a nd maybe it will give you a better idea if you want to take on the project. for 15 dollars, you can get the plans, and at the very least, you will have them for later when you feel confident enough. here is slink to the build video: th-cam.com/video/8DMduHD4pFk/w-d-xo.html let me know if yo have questions along the way. i keep a photo archive i can send by email if you need. cheers! Spike
True, would reduce drag too and allow for longer flight times when climbing to altitude. For this flight, we actually welcomed the props spinning freely, and their extra drag, as we slightly held the nose down for most of the descent to get down quicker. there is also electronic braking for the props which will reduce drag and vibrations slightly, but we would rather have the drag for fast descents. the nacelles would have to be redesigned to use folding props, and probably move the motors further away from the wings to allow for rear-ward prop clearance when folded. Most flights have the motor running for almost the entire flight, up to 4+hours, and have no need to fold props. Would be interesting as an option though..
This is pretty impressive, but how do you know if you're remaining outside CAS? Also, you experienced a classic inversion - I've flown in quite a few (full size plane) and the transition from the bottom layer to the top is quite remarkable. The turbulence just gets switched off!
+cjm2005 we are outside the US, and at the time of filming, there were absolutely no rules regarding RC aircraft, etc. Here, the most dangerous place to fly is low over the designated model field. not much air traffic here anyways. yes, it's very neat to be able to get above the local weather. many times, i have noticed a slightly turbulent layer, about every 1000 to 2000 ft. and the wind direction seems to change and strength also, with every layer.
You need to do a bit of study on meteorology mate, it's absolutely fascinating, even more so when you see it in action in real life observations. en.wikipedia.org/wiki/Inversion_(meteorology) Also, due to the Coriolis effect and surface friction the wind direction and strength changes as you ascend - the general rule is 'increased (in strength) and veered (to the right) going up, slack (less strength) and back (to the left) coming down. You can access spot wind charts & use the forecast winds to decide on a cruising altitude if you want to do a long distance flight :)
+Bill Bonovas Thanks for your interest! you should find all the info you need including plans info at out website: www.bearospaceindustries.com/store.html
the flight was made before many of the regs. we did check air traffic routes, and it was done in a country with very little air traffic. we also have an aviation handheld radio with the freq for the local airport.
Hi there how did you get the transmitter and receiver very super long range is 13,000 ft is for your plane to control it to go to over the clouds but more high can you give a links please and receiver box and video transmitter is but the video transmitter on your plane but do you need power on your plane receiver or battery connected and power to video transmitter is but how did you get all hobby parts for your plane and connect two brushless motors on your plane can you give a links please
it will depend on the local conditions, but in my limited experience, above 600 meters AGL is usually pretty clean, but there will be thin layers every so often up higher, as the transitions between layers shear. how many, and spacing will vary.
+FPV Flying yes, it's an MFD tracker. the 13db patch is modified to make it lighter, by removing the radome,and replacing the backplate with depron covered in alum. foil.
200mw, with 600 high power mode in reserve. I did not use the hi power mode, as it was not needed, but did experience a couple of very short, 1 sec or so glitches. It was not a problem, as i had the failsafe set to power down to 0% throttle, and the flight controls set to flight trim. none of this was a problem. EZUHF by immersion rc was used with adversity receiver, for control. the antennas on the plane are dipoles, with one oriented horizontal, and the other vertical in the fuselage. the ground antenna was fixed, a diamond sr771 i think, and was oriented vertically, (wrong way) for the entire flight hence the glitches. a directional antenna on the tracker would be much better, but i'm not doing these kind of flights very often, so mostly worried about getting data to improve the design of components, like the battery, and future design on aircraft. thanks for the question. Cheers!
hi ankurgokhale, have you become a flat earther yet? If not I suggest viewing the 13 part series _what on earth happened_ in my about to learn how the earth is not a globe
+BlueMountPicture s the video transmitters are 1.2 mhz and are advertised at 600mw, i think. either 800 or 600. with a good directional on the ground, and the tracker, no need for a lot of power.
Ok thanks :) i think i will buy a 250mW and a good Patch antenna but i life in Germany and i will never fly that far because its illegal in Germany :( (the legal in Germany 25mW but nobody cares :D )
So just out of curiosity, how did you guys get up that high without any issues with the FAA? Did you file for a wavier/ COA or are you guys located out if the United States?
We're outside the US. Actually laws in US have changed, and you can get a commercial license now. The FAA finally got reasonable, but seems to be favoring commercial operators, of course. Typical gov. favoring special interest, and industry over citizens, but whatever. at least you'll be able to get a job designing, repairing, or flying them now!
At the time of the video, i used none, but since have added a Piexhawk running arduplane. It's working well. you can find more info here: www.bearospaceindustries.com/give-me-more-data.html scroll down the center column for info on the flight controller and setup.
But what kind battery did you use for the plane to fly very very long like 3 to 5 to 8 hours is can you give me a links please but how many volts battery did you use please
It's a battery we assembled ourselves, from 60 pieces NCR18650GA cells, similar to what Tesla cars use. It's a 3S20P battery, so 3 groups of 20 cells in parallel. each group is in series. each cell, and group is 3.7v nominal, and so when the 3 groups are in series, the total battery pack output is 11.1v nominal. the voltage is 12.6v when fully charged, or 4.2v per cell. the cells can be drawn down to 2.5v per cell/group, so you can run the pack total down to 7.5v. on this flight, we only ran the battery down to about 10v, so could have flown longer, and gone higher. The long range radios are on relatively low frequencies, and we use directional antennas on the ground, to get good reception when far away. The equipment on the plane does not take much power, and is made from mostly security system components. some of our older videos show the equipment.
have ordered some on ebay, and amazon. also distributed by other vendors which sell batteries. Jus to be clear, the long flight times are partly due to the batteries, and partly due to the airframe design optimization and strategic flight planning. @@sandygregoire2732
Hello, I'm having trouble getting the carbon fiber rods, you know anyplace I can get those? also what motor you recommend also for the esc's, you have plans on selling the tesla batteries?, thanks
Ritchie AQ Here is where i have been getting the carbon wing central spar, and outer wing sheath tubing: www.ebay.com/itm/OD-25-mm-ID-23-mm-x-1000mm-1m-3k-Carbon-Fiber-tube-Tubing-pipe-shaft-/141394052252?pt=LH_DefaultDomain_0&hash=item20ebbe049c i recommend putting all of the items in your cart front he same seller, then requesting a combined invoice front eh seller on ebay. he will send you conbined invoice, and you save the cost of shipping the individual shipping. you can also simply contact seller, and tell them what you need. they re in china, but speak english. keep communication simple, it's better. i recommend the e-flite power 15 motors, apc thin electric 13 x 8 props, counter rotating inward at the top, and phoenix edge 50 amp ESC 's. the pultruded carbon strips come from RCFOAM.com. they re easy to order from. I am making a "Tesla" style battery for someone right now, in 4S. same weight, and watt hrs, just higher voltage. I recommend stick with the 3S, because it's an easier fit in the plane. not as tall. the 4S barely will fit. it's shorter, but taller. Hope this helps! Best, Spike
FPVREVIEWS I'll check that eBay seller thanks, how much are the batteries? Im interested, I'll be flying in high elevations so I think that's the battery I'll better use
Ritchie AQ The battery runs 670 u.s. dollars, plus shipping and any duty or customs fees that it incurs. there are more specs about it on the store page of the website. The price is actually comparable to lipos, if you look at the capacity. check it out!
FPVREVIEWS I'll take a look, sure I'll order one of those, one final question, you think the eflite power15 motors will be enough if I'm planing to takeoff at 7000ft? Thanks in advance
Ritchie AQ Yes, I think they will be just fine. keep in mind that the electric powered plane will not be affected at all in amount of power required for flight, with the increased altitude. The reason that full scale aircraft are affected in their power output is that there is less oxygen for the internal combustion engine to breath at increased altitudes. the electric power does not have that problem. it will work in space itself. The only consideration is the rpm range of the motor, as the aircraft has to fly a little faster, and the airspeed is more. However, electric motors have a very wide rpm range in which they maintain efficiency, much wider than any reciprocating gas engine, so there again, that will not be noticeable. The only consideration is the prop, as a slightly higher pitch should be used for higher altitudes. The 6000ft that you are at is really not that high, and the recommended props for gemini v-2 are already pitched fairly high, so they should work very well. Those same props, being pitched high, also hav an advantage at lower altitudes, as they decrease the blade rpm necessary to achieve a certain amount of thrust, like for loiter mode, thus increasing efficiency. I really doubt that you will notice the difference when taking off at 6000 ft. I went once to 10 000 ft altitude with a setup that i used at sea level, and had to carry a camera payload that put the plane way over gross weight/ I had tested it at sea level, but i was worried about peformance at that altitude. When i flew the airplane, i could not tell the difference. It was a skywalker 1900, with a canon T3I strapped to the nose, one 3S 5000mah battery, an elite park 480 motor, and a 3 blade 10 x 7 prop, so it was very overloaded. you could experiment with different props, but the problem with going higher in pitch is that the blade angle with any higher pitch will stall at zero airspeed, like accelerating from a stop on takeoff, an equally important part of the takeoff run, so I would recommend stick with the 13 x 8 props to start with. hope this expains it sufficiently.
So where i can buy those EZUHF rx and TX can you give me link of websites please but do you need taranis radio connects to EZUHF rx and TX and they needs to update it to use long range for your plane please
4:52 that's a very good landing!
I love your tail cam, landscape looks so great with this layout view.
It's always a pleasure to watch your videos :)
Epic until the end!
Million of thumbs up and have a great week
cameras can be added to the wingtips as well. making eh gemini a pusher would put the props in turbulent air, and cause vibrations, but would work. similar to the piaggio avanti aircraft, they have unique noise profile, if you have ever heard one. that noise is the pressure differential from the wing hitting the props. i don't consider it a good thing, but it could be done.
i know that sound!! i fell in love with it's design, a few occasionally fly out of my airport where i work. i thought the noise was caused by the exhaust hitting the props.
it would fly the furthest at a relatively high altitude, without descending, because the air is thinner, and travel through it is more efficient.
This is the strategy behind commercial air flights, and the reason they expend extra fuel to get to their cruising altitude.
at sea level, the theoretical max distance is 120 km, with the 3kg battery pack, in stock configuration.
I love the high altitude footage, very peaceful looking.
So much freedom, The view is beautiful.
I feel like I'm flying, this is awesome!
Simply Incredible!
(Also anyone else think of Liza when the music came a couple of minutes in?)
I really like watching these kind of videos. I use fly weight shift ultralight trikes, but I can't afford it anymore. So this is the next best thing. I disabled & was wonder how much a basic setup like yours would cost. I would really like to purchase to purchase a glider, & perhaps make it solar powered to help make the battery life longer.
Has to be the smoothest flying fpv going. It's manners in the air and on ground are unsurpassed
Would be great if you could put the telemetry on screen.... :-)
Martin coming soon on our other channel. see the description.
FPVREVIEWS can something similar be build with 100000s of km of range with the help of satellite
Cool camera setup with gimbal in the front!
Wow what an awesome aircraft! I like that's its the controls are kept simple, as ailerons are just not necessary for an airplane built for this purpose.
We just published a video on how to make the Battery, for those who have been asking!
Very Cool. You said the batteries recovered. Wondering if when you shut the motors down, the windmilling props charge the batteries? Cheers.
Brilliant ideas...can the avionics autopilot ,tvtrans.engines ,esc,batteries etc.. defeat high weather tempreture of more than 40 centigrades working for more than 4hrs on 1000meters altitude ?
+Salih Mehdi temperatures get less at higher altitudes, not more. so, no problem, just need insulation for extreme altitudes, and extreme low temperatures. At these altitudes, it is not a problem. it would be interesting to add an outside air temperature sensor to the plane, however. also a barometric sensor, so sense density altitude. alternately, airspeed could be compared with average groundspeed.
That was gorgeous Mr. Webb!
glad to know you're still flying kevin costner
Random?
Quick question:
Why dont just dive down like a kamikaze for descending quicker.
because you could stall
@@comedicsketches ever heard of an accelerated stall?
Nice shots from altitude.
I'm baffled. Good job!
Really nice video man keep up the good work
Kick ass flight guys! keep it up! I cant wait to see what kind of SAR work can be done with this bad boy!~
awesome flight guys
Any thoughts on putting the newer super-thin and light solar cells on the upper wing surfaces? There are single engine planes already on solar with sustaining battery life- they never run out. You could at least significantly increase duration this way...
great video man best setup ive seen yet
I can't wait to do that with my 2.4 m ranger.
Just saving up for a couple more parts
I've seen two approaches to high altitude, using lift and climbing relativily slow, and climbing very fast. still not sure which is the best, but the fast method does not need a very big plane.. ha ha. sounds like your ranger would be somewhere in the middle. Looking forward to seeing it.
What equip are you running?
NIce!. You need flaps and speed brake to expedite the decent
Awesome! What kind of radio did you use? Any amplification device?
very nice set up
Incredible work. Sorry if you mentioned this, but do you have to register this in any way?
On next flight can you mount one camera with no-distortion lens? Seems every go-pro or any other camera has wide-angle or fish-eye lens. Curious what horizon looks like in high altitude. Amazing work.
+Mark K from this altitude, no curvature is visible, if that's what you mean. i'll consider using some different settings on the go pro, as they have narrow field of view setting, which makes them look like a normal camera. thanks for your input!
+FPVREVIEWS Amazing what you can build and how high you can fly it. "... from this altitude, no curvature is visible..." Now I'm confused more than ever before. Thank you for your response.
+Mark K airliners fly about 2-3 times that high, and from them, you can't see the curvature, really very well. i think it's not clearly visible until something like 40-50 thousand feet, but i could be mistaken.
i'm sure google or wiki would have some info.
+FPVREVIEWS here is something i found from an airline pilot: "From a friend who was a military pilot, and from sources such as the many books I have read on the SR-71 and U-2 it can be said that this doesn't appear until you get up to 55K-60K feet........
The highest I have been is 41K on a 777 and I couldn't see anything but a flat horizon."
sounds like we need a better airplane, i will start designing it... LOL
+FPVREVIEWS Long story short friend of mine (deep thinker and thinks way too much) told me we live on FLAT EARTH. I laughed in his face and said few things. He challenged me to prove him wrong and I can't use NASA pics or any other pics using wide-angle or fish-eye lens. He said I will never see curvature with my own eyes because there is none. With Earth's size and mathematical formula we should see curvature when looking at horizon from high altitude. At 4k to 5k feet high we should see curvature and 20k feet high curvature should be obvious. More I research this more questions I have. WTF.
Great camera shots!
Enjoyed the flight, just a question, was there any concern of large aircraft in the area?
no concern. The area which we fly is a bit of a dead zone for air traffic between 100ft AGL and 20,000. we do monitor carefully for low level traffic. it's near an airport. this was also made before the regulations in our country.
So cool.. nice view from the sky
Nice work, when is the arf version on sale.
is there such a thing as a small radar setup for air traffic? be nice to have that on the osd.
Um, no. at the relative speeds that our uav's travel, it would be fairly useless anyway, as we are not fast enough to get out of the way of all but the slowest manned aircraft.
I think the key will be to make an aircraft which can climb vertically or descend vertically at a very high rate of climb, and in a efficient manner, also controlled, and safe. a hard problem, but one that tilt rotors and reversible/variable pitch thrust can solve.
much better to use a system of shared V2V communication to share position and heading/speed date, i think.
the automotive industry will probably provide a working solution there.
it'll all come together, but will take some time, and there will be ranting and raving in the meantime. also bans, and arrests. basically, lots of hysteria. Sad.
FPVREVIEWS. I would say the question still stands. And I want it, or at least a form awareness. To avoid each other or simply know there is a jet three miles out and five miles up. Especially, because we can't say we won't continually push our limits. There are apps on my phone that allow me to see commercial planes and where they are in the sky in live feed. Tapping into data already available, and/or uploading our own location actively or indicating it passively. As I push the limits, I feel at least being able to transmit out something other aircraft can pick up would be easiest. Seems like if commercial aircraft tapped into our video out they could avoid us at least. Using a simple algorithm of the signal strength a manned aircraft can workout location, direction and speed. I Just have to imagine it is cheaper to pay engineers of the F35 and they have worked out how to avoid all objects in the sky vs the cost of repair or crash. I also hope their method of avoid is not to shoot us down. Ha ha
transponders are the current way of keeping traffic separation. as well as ADSB.
This si a technical challenge, but a solvable one, and V2V communication, as i mentioned already exists, at least in working prototypes. Hard part about any of this tech is getting the government to approve it. V2V will be the first as it will make the roads safer pretty much immediately, so it's hard, and unpopular for the gov. to drag their feet on the implementation.
FPVREVIEWS. I will look into that tech. Certainly curious about size and weight possibilities. A lot of work for good reasons. yes, to be continued/stretched out.
Nice flight! If you are planning to fly with no power on a regular basis, I recommend you look to set the speed controllers up to brake the motors and stop the props freewheeling. This would reduce the drag significantly.
yes, you are absolutely correct, but if you notice, I actually put the plane in a slight dive, to bleed off altitude, as a glide for that height could take over an hour. so i actually wanted the extra drag. you could get a longer flight time with the brake on for sure.
it does not reduce the drag. Also see my reply to the dude further down asking the same. I can prove it on paper if you like physics
Any airspace infringements?
could you explain it to me? I believe you but I would like an explanation.
My answer wasn't entirely right,i had forgotten about parasitic drag on a freewheeling prop. The answer is,for a given prop with a given pitch and given length, whether or not one should leave it freewheeling depends on the gliding speed. Here is a paper with test data i found: www.peter2000.co.uk/aviation/misc/prop.pdf
Anyway a collapsing prop is the best solution :)
Awesome flight, great video and music!
This plane will never stop impressing me. I wish that I got this instead of the skyhunter, but maybe Ill buy this next time. You are so high and the scenery looks so different than in America. In what country do you live, because it is so beautiful there.
+daniel perkins Mexico. thanks for the compliments. it's nice weaterh here, but not worth the trouble. living here is not easy. better off in U.S. overall.
+fpvreviews you live in Mexico nice! ensenada? im from mexico city just order the plans to get building and flying!
soooo what about doing a nose dive over the ocean then pulling up to test the strength of the wing?
Those are some funky intermissions...
very cool video guys! what video system did you use for the FPV and what long range control systems? this is impressive!
after watching this video again, I'm kinda surprised that you don't have the brake enabled on the esc's. Wouldn't enabling the esc brake, therefore stopping the propellers from spinning, reduce drag from the freewheeling props?
Nope,as the blades spin freely the drag is reduced compared to being still,u can figure this out considering when spinning,from the blade's frame of reference,the air is moving at angle closer to the chord of the blade. If you can minimize internal friction of the shaft this rotation speed increases to the point of 0 drag and you can have a glider that doesn't need to collapse its prop.
frizstyler I never thought about it that way. Thanks for that!
Yes, stopping the props would make it glide better. You can test by trying to autorotate your heli with and without the blades spinning and see which one comes down faster.
Steve C hmmm, I'm not real interested in testing that theory with my helicopters lol
during autorotation the blades already have built in inertiawhich can produce lift when you turn up the pitch. however my answer isn't completely right. parasitic drag plays its role for a freewheeling propeller. i found a paper with test data.: www.peter2000.co.uk/aviation/misc/prop.pdf
More than creativity .... wonderful
thats bad ass two thumbs up if i could, absolutely amazing footage and build
very nice. how high you want to go? 20000ft?
+Jörn Beyse the original design spec was for 20 000 minimum, and to carry a full size DSLR to 10 000 and keep it there for 1 hr. or similar atmospheric sampling payload. i have not fully tested, but i believe both are achievable with the standard airplane.
thats amazing. How much did it cost to build.
This was a wonderful video!
this plane can be a spoting plane for arty and correct firing for them + what the range of this plane ? pretty nice plane you made there and sorry for my bad english
Good flight. I see, landed with the engine running? Still there was to reserve batteries? Whether rotating on stream?
+OLEG69M there was still about 15% of the battery remaining. I have the ESC's set up to free-wheel, or turn freely, as it makes more drag, which helps to descend, and helps a little to flatten the glide slope for landing.
+FPVREVIEWS Understand. The high speed without the engine running?
+OLEG69M the climb is with the motors running. the glide is with the motors not running. I shut them off, to keep a reserve of electrical power, in case i have to abort a landing, divert, or need power to get back to the landing zone.
+FPVREVIEWS A large load on the wing?
+OLEG69M not really, still several pounds under gross weight.
great job! would love to know more about the downlink equipment
Very impressive. Sadly here in the US we won't be able to do anything like that now with the new FAA regulations.
+Barrett Powell The FAA is a rouge agency, acting directly agains it's congressional mandate. fly safe. you're not a real threat. don't let them brainwash you.
+FPVREVIEWS Unfortunately as a full scale pilot also I'm already under their jurisdiction.
+Barrett Powell well, then you know just how much they have damaged aviation. Funny that it's the purpose of the FAA to promote aviation.
I cant believe everyone went along and registered there model aircraft. Now they have funds to create more authority. Just wait. Ten years to register it will be thousand dollars and have to pay yearly taxes on our drones, force us to get a licence insurance.
Very nice! What city are you in?
Did you or can you use Autopilot to return ?
What type of onboard oxygen system did you use to keep the pilot from passing out?
Oh, never mind, you probably had a pressurized pilot compartment to handle all that pressure change. :)
If you call sea-level a pressurized pilot compartment then yea
is here trinity headtracker or diy arduino tracker?
Excellent. Very nice setup
But what kind brushless motor did you use can you give a links please
Question. why is it legal to fly RC airplanes to those altitudes but quads are restricted to 4oo ft.
+victor chakmakian if you have a HAM license you can fly almost wherever you like, although you should make aware any near airports of your flight, and have reflective antennas that make you stand out on radars.
gay isn't it.
Wouldn't the air there be incredibly cold and take a toll on the battery and control surface? I've seen high altitude pilots struggle with frozen servos before.
Does it have landing and navigation lights?
so what kind all hobby parts did you use please
for the plane you build how much it all hobby parts it cost to build please
so can you give me a link so where did you buy all hobby parts for your plane
I asked on another video this may be a stupid question but could you extend the range of your transmitter by attaching antenna to something like say a balloon or a kite or maybe even a pole.. something that could go up pretty high to extend the range?
yes, that would absolutely be a possibility. if you need the range for RF. lately, we're focusing mostly on full autonomy, which is even better for most applications, because the aircraft no longer needs to be in range to perform it's mission. There are circumstances which would require operator input, such as for certain types of decision making, but mostly, it can be eliminated, or compensated for my flying more auto missions, which costs almost nothing, and requires no operator for the majority of the flight.
@@FPVREVIEWS basically autopilot very interesting but what application would you use that for I can see for like deliveries/geography or whatever, but just for hobbyist based applications as in having fun lol it would be exciting to know your RC can fly itself back and forth but that would take the fun out of it after a while. I would like to see how high I could get without the use of drugs lol But seriously I would just like to see how I could get and take photos
Or just say I did it You know what would be cool to build your own V2 but instead of going fast go real slow so slow that they won't be able to shoot you down because their rockets are too fast hahaha
@@earlyculyer4103 Even with the autonomous systems, you can take various degrees of control, including full manual, and have that RX failsafe option. so it all depends at that point, what is the range of your control, and video systems. fun stuff. I hope nobody shoots at my planes. they are a lot of work to build, and not cheap.. :)
How do you implement possible air traffic in your flightplan, especially at higher altitudes?
Sjoerd Postma large air traffic in our area is extremely rare, and is over 25 000 feet. smaller air traffic is almost always at very low altitudes in our area, under 1000 ft, and talking to ATC, so we can listen.
FPVREVIEWS Thank you for your answer. I live in the north of The Netherlands, where the sky is congested with all kinds of air traffic (VFR, IFR and military) All in a tiny airspace. Rules for fpv are also very strict and making a flight like you did is next to impossible for us. I really enjoy your video's and maybe, one day, we can build a Gemini and make our own video :))
Sjoerd Postma we are lucky if we see one airplane in a week here.
What's your specs and what outputs settings did you use?
Thanks 4 yr quick answer..here in Iraq we suffer high temp. weather since the end of April till the end of September..as u know temp. decreases about 6.5C each 1000meter higher..so in June ,July ,Augest & Sep. temp. at surface is 55-45C ...& that causes many electrical failure in the uavs..even the US troops got problems in using the RQ11 Raven ..as i read..any how i`m thinking of puchasing one..
What kind of uhf antenna combination did you use?
Kurtis Towery ezuhf diversity with two homemade dipoles. made from servo wire. just look up dipole calculator on google. it will give the lengths.
can anyone tell me what camera he was using
Folding props or ESC brake would really help your glides back down.
yes, it would help, but for this flight, we were actually in a slight dive, and trying to bleed off kinetic energy to get back down more quickly. it would be nice to have options, though.
Hey...Great Video!
What´s the cost of the laser cut´s ?
+Morten Holck send me an email at fpvreviews@gmail.com and i'lll send you the complete info package for the kit.
thanks for your interest.
Do you need FAA clearance for a flight like this?
in the USA, probably.
And what kind speed controller did you use for your plane gets more strong give the brushless spins super faster and what kind propellers did you use can you give me a links please
Hi FPV review, I really like the Gemini version 2 and have looked at the available blue print plans to build. I have builded aircraft from a kit. Just not sure I can build the Gemini from your plans . Do not know if I have enough know how to build. wish I had hands on or a very good video to go on, thank you. what do you suggest.
+Coolwater Hubby watch the build video,a nd maybe it will give you a better idea if you want to take on the project. for 15 dollars, you can get the plans, and at the very least, you will have them for later when you feel confident enough.
here is slink to the build video:
th-cam.com/video/8DMduHD4pFk/w-d-xo.html
let me know if yo have questions along the way. i keep a photo archive i can send by email if you need.
cheers! Spike
Folding props will eliminate the remaining residual chatter caused by turbulence in glide mode
True, would reduce drag too and allow for longer flight times when climbing to altitude. For this flight, we actually welcomed the props spinning freely, and their extra drag, as we slightly held the nose down for most of the descent to get down quicker. there is also electronic braking for the props which will reduce drag and vibrations slightly, but we would rather have the drag for fast descents. the nacelles would have to be redesigned to use folding props, and probably move the motors further away from the wings to allow for rear-ward prop clearance when folded. Most flights have the motor running for almost the entire flight, up to 4+hours, and have no need to fold props. Would be interesting as an option though..
This is pretty impressive, but how do you know if you're remaining outside CAS?
Also, you experienced a classic inversion - I've flown in quite a few (full size plane) and the transition from the bottom layer to the top is quite remarkable. The turbulence just gets switched off!
+cjm2005 we are outside the US, and at the time of filming, there were absolutely no rules regarding RC aircraft, etc. Here, the most dangerous place to fly is low over the designated model field. not much air traffic here anyways.
yes, it's very neat to be able to get above the local weather. many times, i have noticed a slightly turbulent layer, about every 1000 to 2000 ft. and the wind direction seems to change and strength also, with every layer.
You need to do a bit of study on meteorology mate, it's absolutely fascinating, even more so when you see it in action in real life observations.
en.wikipedia.org/wiki/Inversion_(meteorology)
Also, due to the Coriolis effect and surface friction the wind direction and strength changes as you ascend - the general rule is 'increased (in strength) and veered (to the right) going up, slack (less strength) and back (to the left) coming down.
You can access spot wind charts & use the forecast winds to decide on a cruising altitude if you want to do a long distance flight :)
Nice flight !
Nice video!!!!! Keep fpv flying. Where can i buy the plans? Do you have them in electronic version for cnc use?
Thanks
+Bill Bonovas Thanks for your interest! you should find all the info you need including plans info at out website: www.bearospaceindustries.com/store.html
Sooo I realize I’m crazy late to this video but I have a question. Did you guys have to file a flight plan because of how high you guys were?
the flight was made before many of the regs. we did check air traffic routes, and it was done in a country with very little air traffic. we also have an aviation handheld radio with the freq for the local airport.
With this exact configuration and ground units, what would be the price
Hi there how did you get the transmitter and receiver very super long range is 13,000 ft is for your plane to control it to go to over the clouds but more high can you give a links please and receiver box and video transmitter is but the video transmitter on your plane but do you need power on your plane receiver or battery connected and power to video transmitter is but how did you get all hobby parts for your plane and connect two brushless motors on your plane can you give a links please
sorry, it says that it was piloted manually, but how is it possible that you re-pilot this plane manually at such long distances?
Excellent video. Great job.
Where did this flight take place, please?
would be awesome to have regenerative prop braking!
Yes, do you know of any alternate firmware for the controllers? or example of this being done on another aircraft? I'd love to see it.
What attitude do you recommend to fly to avoid low attitude turbulence? I seem to be hitting a lot of them when I fly between 800 to 1200feet.
it will depend on the local conditions, but in my limited experience, above 600 meters AGL is usually pretty clean, but there will be thin layers every so often up higher, as the transitions between layers shear. how many, and spacing will vary.
did you use an antenna tracker for the video link ?
+FPV Flying yes, it's an MFD tracker. the 13db patch is modified to make it lighter, by removing the radome,and replacing the backplate with depron covered in alum. foil.
very good
how mutch power TX output
thank you :-)
200mw, with 600 high power mode in reserve. I did not use the hi power mode, as it was not needed, but did experience a couple of very short, 1 sec or so glitches. It was not a problem, as i had the failsafe set to power down to 0% throttle, and the flight controls set to flight trim. none of this was a problem. EZUHF by immersion rc was used with adversity receiver, for control. the antennas on the plane are dipoles, with one oriented horizontal, and the other vertical in the fuselage. the ground antenna was fixed, a diamond sr771 i think, and was oriented vertically, (wrong way) for the entire flight hence the glitches. a directional antenna on the tracker would be much better, but i'm not doing these kind of flights very often, so mostly worried about getting data to improve the design of components, like the battery, and future design on aircraft. thanks for the question. Cheers!
Beauty of the earth, I agreed with you mate.
hi ankurgokhale, have you become a flat earther yet? If not I suggest viewing the 13 part series _what on earth happened_ in my about to learn how the earth is not a globe
EZUHF rx and TX so where i can buy that please
Ebay is your friend
@@FPVREVIEWS but do you need taranis radio connects to EZUHF rx and TX and they needs to update it to use long range for your plane please
@FPVREVIEWS but do you need taranis radio connects to EZUHF rx and TX and they needs to update it to use long range for your plane please
yes.@@sandygregoire2732
So what kind did you used website
To find firmware to update it
Nice. What type of mapping are you doing with the gopro?
beroth1 none, but we are just developing the airframe for others to use for mapping, search and rescue, fpv, etc.
Me pueden vender una copia del plano? No importa el formato.
lo tenemos disponible en nuestro sitio WEB. Vinculo en la descripción. Gracias por su interés.
Awsome flight :D how much mW FPV do u use ?
+BlueMountPicture s the video transmitters are 1.2 mhz and are advertised at 600mw, i think. either 800 or 600.
with a good directional on the ground, and the tracker, no need for a lot of power.
Ok thanks :) i think i will buy a 250mW and a good Patch antenna but i life in Germany and i will never fly that far because its illegal in Germany :( (the legal in Germany 25mW but nobody cares :D )
Where do you buy this model?
If you watch the video you would know.
So just out of curiosity, how did you guys get up that high without any issues with the FAA? Did you file for a wavier/ COA or are you guys located out if the United States?
We're outside the US. Actually laws in US have changed, and you can get a commercial license now. The FAA finally got reasonable, but seems to be favoring commercial operators, of course. Typical gov. favoring special interest, and industry over citizens, but whatever. at least you'll be able to get a job designing, repairing, or flying them now!
Does this plane have an FC, if so which one and why?
At the time of the video, i used none, but since have added a Piexhawk running arduplane. It's working well.
you can find more info here:
www.bearospaceindustries.com/give-me-more-data.html
scroll down the center column for info on the flight controller and setup.
But what kind battery did you use for the plane to fly very very long like 3 to 5 to 8 hours is can you give me a links please but how many volts battery did you use please
It's a battery we assembled ourselves, from 60 pieces NCR18650GA cells, similar to what Tesla cars use. It's a 3S20P battery, so 3 groups of 20 cells in parallel. each group is in series. each cell, and group is 3.7v nominal, and so when the 3 groups are in series, the total battery pack output is 11.1v nominal. the voltage is 12.6v when fully charged, or 4.2v per cell. the cells can be drawn down to 2.5v per cell/group, so you can run the pack total down to 7.5v. on this flight, we only ran the battery down to about 10v, so could have flown longer, and gone higher.
The long range radios are on relatively low frequencies, and we use directional antennas on the ground, to get good reception when far away. The equipment on the plane does not take much power, and is made from mostly security system components. some of our older videos show the equipment.
But where did you get the 60 cells batteries please
have ordered some on ebay, and amazon. also distributed by other vendors which sell batteries.
Jus to be clear, the long flight times are partly due to the batteries, and partly due to the airframe design optimization and strategic flight planning. @@sandygregoire2732
Did you use the old broken laptops or smashed to find the batteries for your plane please
No, bought new cells. @@sandygregoire2732
Hello, I'm having trouble getting the carbon fiber rods, you know anyplace I can get those? also what motor you recommend also for the esc's, you have plans on selling the tesla batteries?, thanks
Ritchie AQ Here is where i have been getting the carbon wing central spar, and outer wing sheath tubing:
www.ebay.com/itm/OD-25-mm-ID-23-mm-x-1000mm-1m-3k-Carbon-Fiber-tube-Tubing-pipe-shaft-/141394052252?pt=LH_DefaultDomain_0&hash=item20ebbe049c
i recommend putting all of the items in your cart front he same seller, then requesting a combined invoice front eh seller on ebay.
he will send you conbined invoice, and you save the cost of shipping the individual shipping.
you can also simply contact seller, and tell them what you need.
they re in china, but speak english. keep communication simple, it's better.
i recommend the e-flite power 15 motors, apc thin electric 13 x 8 props, counter rotating inward at the top, and phoenix edge 50 amp ESC 's. the pultruded carbon strips come from RCFOAM.com. they re easy to order from.
I am making a "Tesla" style battery for someone right now, in 4S. same weight, and watt hrs, just higher voltage. I recommend stick with the 3S, because it's an easier fit in the plane. not as tall. the 4S barely will fit. it's shorter, but taller. Hope this helps!
Best, Spike
FPVREVIEWS I'll check that eBay seller thanks, how much are the batteries? Im interested, I'll be flying in high elevations so I think that's the battery I'll better use
Ritchie AQ The battery runs 670 u.s. dollars, plus shipping and any duty or customs fees that it incurs.
there are more specs about it on the store page of the website. The price is actually comparable to lipos, if you look at the capacity. check it out!
FPVREVIEWS I'll take a look, sure I'll order one of those, one final question, you think the eflite power15 motors will be enough if I'm planing to takeoff at 7000ft? Thanks in advance
Ritchie AQ Yes, I think they will be just fine. keep in mind that the electric powered plane will not be affected at all in amount of power required for flight, with the increased altitude. The reason that full scale aircraft are affected in their power output is that there is less oxygen for the internal combustion engine to breath at increased altitudes. the electric power does not have that problem. it will work in space itself. The only consideration is the rpm range of the motor, as the aircraft has to fly a little faster, and the airspeed is more. However, electric motors have a very wide rpm range in which they maintain efficiency, much wider than any reciprocating gas engine, so there again, that will not be noticeable. The only consideration is the prop, as a slightly higher pitch should be used for higher altitudes. The 6000ft that you are at is really not that high, and the recommended props for gemini v-2 are already pitched fairly high, so they should work very well.
Those same props, being pitched high, also hav an advantage at lower altitudes, as they decrease the blade rpm necessary to achieve a certain amount of thrust, like for loiter mode, thus increasing efficiency. I really doubt that you will notice the difference when taking off at 6000 ft.
I went once to 10 000 ft altitude with a setup that i used at sea level, and had to carry a camera payload that put the plane way over gross weight/ I had tested it at sea level, but i was worried about peformance at that altitude. When i flew the airplane, i could not tell the difference. It was a skywalker 1900, with a canon T3I strapped to the nose, one 3S 5000mah battery, an elite park 480 motor, and a 3 blade 10 x 7 prop, so it was very overloaded.
you could experiment with different props, but the problem with going higher in pitch is that the blade angle with any higher pitch will stall at zero airspeed, like accelerating from a stop on takeoff, an equally important part of the takeoff run, so I would recommend stick with the 13 x 8 props to start with. hope this expains it sufficiently.
So where i can buy those EZUHF rx and TX can you give me link of websites please but do you need taranis radio connects to EZUHF rx and TX and they needs to update it to use long range for your plane please
wow thats some altitude! makes the 120m limit in the uk seem rather paltry by comparison :)