Fan Powered R/C Airboat
ฝัง
- เผยแพร่เมื่อ 8 ส.ค. 2019
- I’m pretty sure electric ducted fans are not the ideal choice of RC power system for an RC race boat, but it certainly was interesting to learn about them. We found out the 4s battery used to power this one wasn't able to supply the the EDF's demand, meaning the power dropped off. Key takeaways:
1 - This RC hydroplane design remained super stable, which is great
2 - The 3D printed parts worked very well
3 - I'll be returning to a motor/prop combo on the next boat
Thanks for watching this one, more projects coming soon!
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Let me know what sea-faring craft I should build next! 🚣♂️ 🚤 ⛵️
That caspian seamonster or hydrofoil plane but I'm not sure if you hadn't tried something similiar 2 years ago
Idk if this would help or not but maybe a higher c rating battery will be able to withstand the big amp draw
But you should build a boat that can carry a rc car😜 but maybe put foam in the car so it floats and get a little blow up boat
typxxilps I’m just going to leave this here 😉 th-cam.com/video/obpKQoIBFWs/w-d-xo.html
ft sea duck
We want to see it going full throttle!
Me too!
@@Project-Air probably the batteries getting a bit too hot and the internal resistance increasing. you should have put, in my opinion, a small air vent going from the back of the thrust tube down into the internals of the boat to redirect some of the airflow and cool down the parts, also maybe punch some holes in the hull in front of the turbine to make the air that get pushed out recycle
DarySparta batteries hold chemical energy. The hotter they get, the more current they can release due to chemical kinetics (Arrhenius equation). There is still a limiting overall max which he is experiencing. A vent wouldn’t have helped. Cooling is needed to stop thermal runaway and permanent damage, not increase current capability.
@@Lozzie74 the more you know! this sounds strange to me but looks.like you have more evidence supporting your thesis. I can tell you not all batteries behave like this as we did an experiment back in school and discovered that batteries terminal voltage decreases with increased temperature which is also to be expected due to dissipation of heat which should be useful energy. Also, it's known that resistance in metal conductors increases proportionally to heat, and since batteries are not only made of chemicals but also metal components this is also to be taken in consideration.
Check your radio programming as it might be in your
Liked the video. I'm glad you took the time to explain the reasons for everything
Pretty impressive build, dude! Fantastic boat!!! 😃
That’s very cool! Makes me want to go get a RC boat! Thanks for sharing. Awesome video. 👍🏼😃
HYDROFOIL!!!!👍🏻👍🏻👍🏻
It would be great if you made a hydrofoil. I made this one but it didn't work well at all, the torque of the propeller rotated it, but I think simply making it wider would work.
www.thingiverse.com/thing:2966914
The good news for you is that I’ve already started on one 😁😁
Awesome! Can’t wait! 3D printed or foam board?👍🏻🤔🤔🤔
Fantastic!! A great build pal well done loved the video thanks for posting.
Great video, the design looks good. My first thoughts on watching the video was that water ingress into the EDF was causing rpm to drop thus no full power, however as you demonstrated towards end of the video, the battery pack just couldn't provide the amps needed. Great proof of concept, great channel. 👍
Keep working on it, and I’m sure you’ll get it! Nice concept!
Great job James, after a long time this hydro seems to finally be getting near to perfection. Now all you need is a higher C battery
Yep it’ll be great to take it to the next level 💪
One of the cool things (even though inefficient) about using an EDF is that it doesn't disturb whats below that lake. Always a concern when im running a boat at a public lake!
Looks and sounds great!!! 👍
Get a higher C rating battery or connect 2 4s in parallel for double the amps
Double the capacity not amps.
Double the amp hours not the amps it gives out
@@thecaptainnoodles What are you on about?
Correct sir! boats need high C rated lipo batteries with thick wires & big plugs . There is much more drag on the water then say an rc car on 20c batteries. Get 50c or larger for boats.
@@thecaptainnoodles No, parallel doubles both capacity and discharge..
@@theadventuresofshellyandfr5618 You can`t just say "50C for boats" I have small models that are fine with 2200mAh 20C for instance, it all depends on size and output..
If that`s say, a 1000W EDF running on 4s, you need about 70A plus some headroom, that means a 4s 2200mAh 30C or higher will do, a 4s 4500mAh 20C will deliver 90A so that`s plenty.
C rating alone means nothing, just saying..
I love making EDF vehicles, this is really cool. Nice work. 😎
very cool project again.👍👍👍 love my ender3 as well
Thanks! Great work!
You may try a higher C rated battery like a C75 you may also be able to go to a higher S rating like a S6 or S5 if your motor is rated for it . You could also try putting a slope backward on your rudder . I would try putting a bit of toe-in on your sponsons , so the faster it goes the less drag it has . Awesome job . I have been watching a lot of videos on air boats the high speed ones like you have built and they have given me many ideas .
I have a number of different motors from drone builds from 2212 to 5802 and up to 18" props . But I have never built a RC boat so I would like to thank you and all the others for all the ideas .
you should make a 1 lb mini battle bot. i am working on one right now and its a really fun project. keep up the good work!
good on you young guy ...keep it going
Wow what a beautiful piece of water you have to use there!
Looking a lot like Bluebird K7. Very nice. Donald Campbell would love this
great fun playing RC boat racing bro... 👍
That lake looks very familiar! great video dude!
Do not move on!!!! Perfect this build were all counting on you!!!! Better battery for starters!!!! Keep it alive!
I'll be building a new hydroplane in the winter with all I've learned from this design in mind. It'll be bigger, have wider sponsons, be powered by a huge motor, etc. I think this current one is limited, not just by the battery; it leaks and will end up falling apart from the inside 😂 - I think it's time for an upgrade.
Damm this airboat thicc
I can't believe it moves using only fans!
it's nice design actually. I like the boat shape.
Go big mate and combine your skills with a flying boat 😁
Excellent spectacular.
Saludos desde Buenos Aires Argentina 👋😎
jorge Nelson felix thanks! Best wishes from here in the UK :)
Great project, it looks correct at speed, it's just a bit nose down. If you do continue with it maybe move the battery back a little.
Nice work ! it looks a lot like bluebird k7 .
Seems like the boat needs more powwaa baby :-)
Muito bom amigo...tambem já construí um barco deste..
Shame the battery wasn't able to fully support the EDF. Looks like a ton of fun regardless.
May I recommend hinging the fan unit for rc of the vertical thrust for ultimate fine tuning? Maybe even gyro assist?
Wow it works well like the one used in hydroplane world speed record with a jet engine
Fun boat
An improvement on your previous boat. EDFs suck a heap of power, so it is probably battery sag. The solution is a better battery, higher C rating or more cells. Even an increase size (Mah) with the same C rating & cell number will boost the power, but add a small amount of weight. Good luck.
for a channel named project air, you sure do a lot of boat models. Not that I don't enjoy it, I like fast anything.
Spacefarer yeah I guess it’s just anything that interests me and has some link aircraft. This one uses airplane parts so there’s your link 😉🙂
What a strange experience; seeing a boat of that shape and color streaking across Coniston is just eerie. It looks so much like Campbell’s K7.
True! Thanks Gryf
Nice clean execution, unique model. What track is that at the end? I quite liked it.
I'm hear as I'm trying to digest every video on riggers as I need to make one . Higher c discharge will sort your probs I think . Good work young sir
Looks good. It seems to roll to the right, (under power?). Could be torque reaction as it seems to level when the power is cut. Perhaps some straightening vanes in the exhaust will remove the swirl from the airflow. Keep experimenting, there are not enough who do it.
The video of the first runs looked like the grainy historical vids of the Loch Ness Monster sightings! Hope to see more runs with higher power battery. EDFs seem to really need mo power!
Good job, I would put a fpv camera ..
Nice! Sounds like a jet. 😎😎😎😎😎😎😎
Yes, the electric jet motor sound like a jet. Very good.
@@shelbyseelbach9568 Sounds like the real thing.
@@LuisLPRCs it is the real thing. It is a boat powered by a jet motor.
More fun sailing
Hi James - nice project. Might be worth investing in an ammeter / wattmeter combo to get the best out of the on-board electrics. Also, a comment below refers to an "intake lip" - this could lead on to some full 'ram-air' ducting experiments to maximize the thrust from the EDF ? Does the LiPo pack have some cooling ? Maybe a small gain here too...
You should 3d print hydro foils for it. And a foil rudder.
So cool! Did you mean to make it look just like the Bluebird K7? Because that just makes it cooler.
For more stability you may set the sponsons further out (make the thing wider). Cool project!
Remko Jerphanion yeah I think I’ll do this on the next one!
I wonder if altering the centerline of the fuselage would help reduce torque roll. Just having the sponsons shifted to side that rolls into the water more. It wouldn't add any weight, but might give a better balance under power.
I say, old chap, how about a bubble cockpit canopy, (as fitted to a Mark 9 Spitfire, and with a live mouse « pilot » to enjoy the high speed runs. This would provide us with some jolly good sport don’t you reckon?
Look into a "canard" hydroplane with two points to the rear and one forward....
low woltage alarm! i usez to have one of those back in the day. beeb beep!
U should try spraying hydrophobic spay on the bottom so it slides better.
sailboat next pls 😁
Is the esc getting enough cooling because if its not that will cause it to throttle down most boats have a water cooled esc
I have a copy of Ken Norris designs of Bluebird K7. They changed a lot over the years building up to 6th of Jan 1967 when K7 did it's last run when sadly Donald lost his life .
Its the blue bird RC K7
its not a plane, but a cool mod and good result despite issues. cheers!
Super!
How heavy would a 3d printed boat/water craft be? You could make it so the fan is like integrated into the boat itself (kind of like the fan in the front on batman's car) I have so badass many I may just do this myself.
Lake District 🤔
Coniston Water 🤔
And it's not raining !! .
Excellent video, you know what to build now don't you ?
Bluebird .
Haha, yeah! And here you go. th-cam.com/video/6Cd_Kin5_7c/w-d-xo.html&t
You're assumption was correct. A higher C rated battery would have made more thrust. EDF pulls a lot of current from the battery. I learnt this from my early days of flying foam EDF jets. That skimping on cheap low C rated meant less power of even audible surging can be heard at full throttle as the plane would fly past.
It's Mad Max on water. :)
Funny that, I live about 2 miles from coniston lake (as its locally called) and have only just found this video
If you put a small turn fin on the inside of one sponson it will turn very quickly at higher speeds
The torque of the motor is pushing the sponson on the starboard since to sink somewhat ?
Maybe moving it further from center would level it out ???
is there a way i could get the plans for this? Nice work.
You’ll get more thrust if you put a front housing flange on the edf.
I Think, the rounded Frontfloats pulls a lot of weak Air behind them, try to shape it more like the Trailing Edge of Airfoil, that can make it a few mph faster,
keep going, good Idea, wish You Succsess👍🏻👍🏻👍🏻
If you're printing a thrust tube, you ought to make an inlet ring as well. Its probably more important than the tube.
Really cool!
But you should use an Intake-Lip on the EDF.
This should increase thrust by about 20% and also the efficiency (Oliver from wemotec told this in forums).
Also I would not use Zippy Compact batterys.
I only made bad experience with them, normal Turnigys are much better and do not cost much more.
Absolutely agree! Unfortunately the intake-lip for this edf blew off in flight when the edf was used to power my EDF Glider 😂😂😂 I should invest in some new electronics.
ProjectAir you should 3D print a new lip
RcUpKoelsch Totally agree about the Zippy Compact batteries. I unfortunately purchased one not long ago, it’s been a disappointing experience. I have to adjust my timer from 5 minutes to 4, whenever I use it.
You definitely need an inlet lip on your next EDF project. You'll get a lot better performance.
Cool
Possible cause of "browning out" may be the ESC does not have current capacity for the edf at full throttle. ESC's will shut, slow down when over loaded.
Once it lifts speed is not too bad considering the current geometry.
I think you should fine-tune the angles (fan vs sponsons),
since you are loosing a lot of energy by contrasting forces !
The rudder must make a lot of drag, have you tried to put the rudder up in the air stream.
might have to go with a higher amp ESC and higher battery rating....but pretty damn cool
Brings back not very nice memories from my childhood of the tragic Bluebird accident
Hi James, see my reply about your Hydrofoils with "Ducks Feet" fitted to a Catamaran, then an aircraft wing was fitted that was hilarious. My stepped monohull boat using 6 NiMh cells and a brushed 540 motor was recorded at over 31MPH, still a UK record I believe. Try either of these?
Why don’t you try a pointed trailing edge for your floaters? Could reduce drag a lot!
Nice build. But it seams you have more weight on the right hand side on the boat. if you even it out you should get more stable at high speeds(when you reach hig speeds xD )
Any provision for esc cooling?
A 70mm edf needs at least a 50C battery…..otherwise the voltage tanks. Also, did you calibrate the ESC?
Mike Brown beat me to it, but yeah add a HYDROFOIL!
If you add a front intake lip for the EDF, you'll get slightly higher thrust. These EDFs do not like turbulent air in front of the fan.
That design is causing drag. The end is lifted and the front is push downward. Repositioning the EDF to angle it to decrease the resistance may lead to be better performance. You can see it in the video.
have you tracked to calculate the speed?
I dare you to build...
a 3 state craft. Submarine, boat, airplane. in one device.
You asked for suggestions on what to build..... Try an Ekranoplan.
th-cam.com/video/obpKQoIBFWs/w-d-xo.html&t
:)
@@Project-Air Thanks, I just watched that one again - but that project didn't really get so far, huh? I was hoping, since there's such a lack of Ekranoplans in youtube world, that maybe you or someone would revisit this idea. I also want to build one but need more info than [what I'm sure] you started with.
Thanks for the reply. Watch for me later this year, dude, cause I'll be putting 'some thing' together. And if you're interested, here's my channel - which lacks considerably in flying machines but is still all RC. Check out 'Al Jensen - Blast! RC'
Very cool! I'm not totally sure, but there were a few instances where I thought I saw the effect of the impeller's torque on the boat at high rpm. I dunno if it's possible to add another counter-rotating piece, or somehow offset the torque, but if I'm totally off, that's fine too. Either way, really cool build!
That isn’t a torque issue.
A torque roll happens when the horizontal axis of the craft is in-line with the rotational force of the engine or motor.
A prime example of this is a single engine airplane. If you were to hold an airplane by the crankshaft while it’s prop was spinning the aircraft would then rotate in the opposite direction.
@@Cerus98 yeah, I fly a paramotor, torque is something I have to deal with. Though in my case all it does is turn me a bit because my motor is offset to counter the roll it gives. Like I said, that's what it looked like to me, one side of the craft seemed to dip lower as power was added. Buuuut maybe I was just imagining it...
daos219 - Nah you’re not crazy - I saw the lean as well. I’m guessing it’s either a balance or alignment issue.
@@Cerus98 that makes more sense, I suppose. I'm not even sure which way the impeller spins, come to think of it. Thanks
daos219 - Looking from the nose cone they spin clockwise.
Do you have stl files of this?, would be nice to build this myself
Like to see it with a better battery.
More fun with a sailboat
Very cool. how about adding an afterburner to take it to the next level?
Three is no combustion to support an afterburner.
@@shelbyseelbach9568 Check out this one. EDF with homemade afterburner. th-cam.com/video/yKuq8T7KMa0/w-d-xo.html
I hope you figured out the battery situation. EDFs really suck batteries down quick. Get a high C rating battery and shouldn’t have a problem. For EDFs I would stick with 40C or better. Anything smaller than that your battery will die quickly and puff. Good luck!
sick!! but i would lovee to see it at full throttle! what would it take though? is it just a new battery?
Anyways awesome vid nonetheless
The battery is what I'm thinking at the moment. Got to do some more trials, but initial tests with bigger batteries seem to show it can sustain full throttle when using higher c rating LiPos.
Cool, remove the rudder from the water and set a new one in the tail, behind the ducted fan like a plane, it will reduce drag and power consumption. 👌
that wouldn't have as nuch autority
could also cause it to not tack as well
so that it enters a turn by itself
images.app.goo.gl/9W1ambLtrgXCwHqF7
Take a peek to do this Air boat
@@albertraich3492 i made a round nose hydro
You should build one with a mini jet engine.