With all these new quadcopter props I think it would be a great idea to revisit this for a video. One thing I'm doing is learning to 3d print a propeller for my ww2 plane. It's a great small flier but it can't land or take off cause the factory prop is a huge 2 bladder prop. It does great but I want to play around with different propellers and see if it will work will a 4 bladder propeller.
2 years later.....did you have any success making props? I thought about making a silicone mold of a few props and then just pouring my own from epoxy, but probably too heavy.
Hey guys, love the show, but I want to correct something you said about pusher props. They are ONLY required when you need to compensate for the torque roll of multiple motors on a plane, or a quadcopter. You do NOT need a pusher prop when the motor is mounted behind the plane; you mount the prop backwards (i.e. the numbers towards the motor) and reverse the motor direction, so the prop turns the correct way around. Look at your Swift II, you don't have a pusher prop on it ;) Cheers, Ben.
@deeringdeluxe I know, that's what I'm trying to say ;) Props have a direction (CCW or CW), you have to mount them correctly (either forwards or backwards based on the motor location) to make sure the numbers on the prop are facing towards the direction of flight. Even if the motor is at the back of your plane, it doesn't mean you need a pusher prop, as long as the prop ends up turning the correct way. It will work fine with either prop type, you just pay more for pushers.
Really like the way both of the Josh(es) interact and and dynamics they bring. Very professional channel that kind of reminds me of Myth Busters. The RC industry needs your approach! Another factor to bring to prop choice is the number of cells in the battery - which affects KV choice - and rated Watts of the motor and ESC. Also, ground clearance for the prop, rated RPM of the prop, differences between gas and electric props. I know its a lot but a multi-part series would be good. Great job.
Everyone's beginning to get sick of HobbyKing and their outrageous shipping costs. Seems like no matter where in the world you're located, HobbyKing will find a way to do you in, essentially forcing us to purchase larger quantities in the hopes that costs subside. They are also very sneaky, not revealing estimated shipping charges, then expect us to register, then enter banking details only to eventually find that the shipping costs are generally far to high. HobbyKing, it's time you get your ducks in a row... and your props balanced! =P
Your Comment Caught my eye. I am an ""Old Goat"" Still Love the Gas engines, and what come with it, the cleanup. Anyhow, I am in total Agreement with you on the ""Sneaky"" HobbyKing, """Gouges"" you to the last dime. I am still in the process of waiting from parts from China, to set up my balance charger to be able to charge more than one at a time, and the mateing cord is another cost. In the process of finding a CNC Hobby Router for up to light steel and aluminum, Best deal for what I can afford needs to be built by myself or come out of China, I Hope To God There is a G-Code For Dummies Respectfully, Jim P.
At least now they let you do a estimate on order including shipping costs unlike they used toI got stung by the when I bought a bix 2 from them so avoided them but they have improved even got free parts with free shipping for some stuff but that's because I had store credit after being refunded for something I ordered that wasn't in stock
The best thing I ever did for the sustained enjoyment of this hobby was to ditch all connections to Hobbyking. Unsubscribe... close account... detatch from email lists. So now shopping elsewhere, the options have all improved, the prices are cheaper, the shipping is no longer sneakily increased with grossly over estimated weights, There is no more angst and pain when it comes to warranty claims with a stupid ticket system, the quality has improved enormously, and I can now buy more stuff.. Really Hobbyking are a textbook case in how to ruin a business through bad ethics. They will always have their place with an endless drizzle of temporary customers, but the counterpoint is what they could have been.. they literally hurl their customers at their opposition rather than being the biggest most successful business in the world.. Treating your customers with a broad stroke of contempt and treating them like idiots will always have the same outcome in the long run..
I informed them yesterday that product was faulty with in 2 hours i got a email saying they were going to ship me a replacement with no questions asked. It was a back light for my dx6i which told them i had installed one before and had no problems. Got email this morning saying its been packed and awaiting to be shipped I must admit they have improved alot I only buy from them because they have warehouse in my country (UK) so they shipping don't take as long. HK sell a lipo balance voltage alarm for £3 (gbp) + shipping Ebay same thing for 99 pence + free shipping Told HK to beat that for price lol
I have been using Banggood for my R/C stuff. Only thing is, it takes them 2 to 3 weeks to get it to me! But, it's FREE Shipping, and NO TAX! They beat everybody in Drone costs and parts, too!
@deeringdeluxe It does! I made the mistake flying a Swift 2 with the prop backwards to what it should be and it really feels sluggish in flight. A prop mounted the wrong way will fly,yes but it will totally be less efficient and less thrusty. The motor direction defines whether it will move forward correctly, but you should never fly with a prop mounted backwards if this means the wrong way is pointing forward in flight.Don't forget props are shaped into a curvy surface that works like a paddle.
would you guys pls do a video about prop adapters, almost nobody includes an adapter when you buy a motor so it is a headache to look for the proper shaft and prop for the motor. Thank you
the adapters come with the prop (or should, always look for the adapter when buying prop...they are just little plastic parts) i know you know this already, but for those who don't.
Geometric pitch is the design of the prop and the amount it should move forward in a perfect world. Effective pitch is the amount of forward movement you actually get.
I have a suggestion for all of you that are confused about props. Order a range of props and then double each order just in case you like one or more. Get your fuselage on the bench and your power meter, and after carefully balancing each of your examples, run it thru the paces. That will give you a more than a rough idea as to the max diameter and bite.Make note of power consumption for each set-up and simply deduce "Dear Watson" ...and then take no more than three props to the field to test.
@flitetest Good point. I still don't think they are worth the expense for single-motor crafts; use lock-tite on the collet (or a prop saver) and don't spend the extra money for pusher props ;) Cheers, Ben.
Can you guys show us how to use the prop balancer? And I was expecting to see some rules of thumb and principles of choosing props, motor Kv, number of lipo cells in series, etc.
Ah man! I bought a normal APC 6x4 for my bixler. I didn't know I needed a special propeller. I heard that I just needed the accessories kit for the NTM motors.
As the guy on the flight line that got elected to straddle the new 1200 horsepower turbine to adjust the variable pitch prop governor, I can tell you that all fixed pitch propellers have a narrow efficiency window to operate with. Airspeed and pitch is everything. If you change the pitch and/or diameter, yes, it's possible to go faster - within limits. Balance the tradeoffs in your choice. A high pitch propeller gives you a long roll on takeoff. A low airspeed, heavy biting high pitch prop will likely never exceed 60MPH. Propeller formulas always include airspeed because of it. For any given propeller, engine and airframe combination, there is a speed at which the propeller noise is at a minimum. A noisy prop (too fast, too slow, bad wind angle, turbulence, etc.) is eating your power wholesale with a reduced return in thrust by comparison. A propeller blade operating in the wake turbulence of another propeller blade is definitely at the wrong airspeed. Drone props are designed for 0 airspeed. Insufficient airflow across jet engine blades and the compressor will stall sometimes violently and wreck the engine. The length of the prop blade is directly proportional to the work required to keep it balanced and the amount of grass your cutting on taxi. In any case, vibration from any source is bad and noisy. There is no such thing as no damage from any prop strike at max rpm. Based on what's usually available to most people, it's very likely that you have a choice of three props for your given combination that will change performance; and three more if the blade count changes. Choose carefully and you maximize flight time. A goal nobody argues with ;)
Great informative video. I have a dji phantom version 1 I'm currently using the standard 8043 plastic props. I flying with dual 2800 mah 3s lipos and a gopro hero 3. I'm wondering if I should upgrade my propellers to the carbon fiber 8 inch props due they are more stiffer and I'm carrying a little more weight or continue to fly with the standard props. Let me know whar you think.
Do you think spinners are necessary for electric rc planes? I have a Turbo Timber Evo. and it looks like the ESC would get better air flow if the spinner was not installed.
Love your channel guys. I'm interested in controlling the noise that the props make. I assume there is some kind of relationship between RPM, prop length, pitch, thrust, and noise. How do you find the right balance between thrust and noise and will quieter props be more efficient? Would love an episode on quiet multi-props. Can a quiet tricopter be made with large props and slower motors with more torque?
I'm building a foam mig 29 jet The wingspan is 81 mm and the weight is 31.1 oz The battery is a lipo 2200 mah 11.1 v 3s The motor I'm using is a A2212/6t 2200 kv and the propeller is 6x4 My question is do you think this setup will work or do I need to change something. Any help would be much appreciated
It wasn't long ago that newbies or youngsters believed a bigger prop was better. I lost count of guys asking what was the longest prop a quadcopter could handle. It seemed a quad with small props wasn't "cool". No amount of advice regarding efficiency etc. could shake them. Such talk was old people's talk, in the end I gave up trying and told them to use 11 inch props as long as they were OK with them hitting the prop on the next motor. They were actually buying quadcopters according to the size of the props. I'm no longer in the business so I have to wonder if it's still uncool to have small props. Or have I got it wrong by buying my props according to motor specs?
Well WeSmashRC you asked a question here and although it doesnt look like anyone tried to help you, maybe you can help others by telling us how you corrected your issue. I mean thats if ya did? I hope ya did. :)
Thank you for evolving little Josh through his dumb Josh, special Josh and slow Josh phases. I kinda like the new wise-guy Josh..."rear end mustache" 1:40. I like it. I'm just kidding...great work!
Hello, how are you? Wonderful details on props. I would like to know that can I switch to single blade prop from a 3 blade prop. I have 1100mm fms typhoon.
hi josh bixler. should i use prop-savers on my scratch foam trainer. it has a 35" wing-span, and a 1534 kV motor, and a 7x6 recommended prop. even thought we'll probably use a 8x6. What say u?
@flitetest The forces involved are the exact same though and if the inner spacer / ring or whatever you'd call that plastic thingyfoo fits correctly, you won't notice anything. It's like changing the position of a washer to clamp a prop properly, but still keep it between two nuts. In other words, the influence is totally and extremely negligible. ;-)
hmm for multirotors i was wondering if there would be advantages to placing the motors on the bottom of their respective boom, facing downwards instead of up and then flipping the prop. i would think less thrust would be lost due to air current impinging on the boom below it. basically it would probably make a low pressure area right around the boom as air flows around it slowing it's downward speed to move transversely to move around the boom thus reducing the net flow or air velocity in that area and then reducing reaction force on the prop and thrust. i guess the trade off is the suction area ahead of the prop. maybe the boom being in front of the propeller it would cause reduced supply of air to the propeller and have even worse effect and this is why nobody mounts the props on the bottom side of the boom?
Hello, recently I broke a 2300 Kv edf ducted fan, and I am thinking of reusing the motor with a propeller for a plane. Is it possible or it will underperform severely? Thanks in advance.
Hey, I am a hobbyist can you tell me how do you select the motor for rc aircraft? How much thrust to weight ratio do you choose ?I have built a plane of around 6kg how much thrust is required?
Just curious if this is an exact science or rather hit or miss regarding choosing engine size (and appropriate prop dimensions) for max performance vs max flight time for planes and copters. Larger motors turning larger props at slower rpm use less power than smaller, high revving motors with smaller props, or is it the other way round....?
@deeringdeluxe There's really no need to respond to me like that, I even stated the motor direction defines which way the thrust will be. But regardless of that a prop really should always face the correct side, as that's when it will work best (you can lose up to 50% thrust if its mounted backwards). A prop that's on a pusher plane will function like a pusher prop, even though you'll have to put it on backwards compared to the motor itself. So what exactly is your point?
1:40, pretty sure the prop needs to face forwards if its on a normal plane or a pusher plane, i use CW props on my pusher plane and it works fine and you can use CCW props on either type of plane, just reverse your motor to suit, you need to explain what your talking about, not just say it spins the other way cos it goes on the back because thats just flat out wrong
.... no no no. this is just wrong. propellers have a leading edge and a trailing edge. you CAN reverse your motor and make a standard prop(ccw) do what a pusher prop(cw) is designed for, but its not efficient because the standard prop is indeed running backwards with the trailing edge out front instead of the leading edge. then entire point of there being two types of propellers is for you to use to proper one for the proper scenario. please do not go around encouraging people to use the wrong prop for the wrong job. running a prop trailing edge first is a good way to cause damage to your plane, propeller, or yourself
yes i know the leading edge always needs to spin the correct way that was my point, you always need to have the propeller facing forwards (the side you see the size and pitch written on most props) my point is you can use a ccw prop if you reverse your motor so the leading edge is spinning the correct way while the front of the prop is facing forwards weather its on the front or rear of the plane. the reason for my comment in the 1st place is why did flight test mention the ccw prop and not go into any detail?
Yeah no need for pusher props in electric planes really, just flip the prop and reverse the motor but in nitro applications you do as the engine cant run backwards
so there are cw props and you say the ccw props are made for pusher planes, why cant you just reverse your motor and use a normal cw prop on a pusher type plane?
this was my question that i found no where else that "is the pusher propeller different from tractor one". so basically if you rotate the tractor propeller the other way than for which it is built, u get a pusher propeller, right?
So heres an idea: multiple electric motors turning one shaft and rotor or prop. The idea being to substitute electric motors in place of cylinders, arranged in traditional "v", boxer, radial or in line cylinder configurations. I dont think it would be very efficient, but im wondering how much horsepower, torque, and rotational speed is obtained........ Like is said just an idea
Jayson Odom it erupted be a constant dive geared system and would be highly inefficient and a pain in the ass to get all the electric motors timed to each other.....you'd burn up motors so fast you'd be refinancing your house to buy more....that's a reason why nothing is built like that.
I bought some cheap props from a seller on eBay in China last week for my DJI Phantom. I broke my original props that came with it and they are expensive to replace. When I received them they looked the same but were thinner and the tips of the propellers were slightly bent downward. Are these safe to fly my $1200.00 quad with? They didn't seem to preform very well when I tried them, it drifted a lot. Should I just fork up another $40.00 for original DJI props, or can you recommend some other solution? I like your show and thanks!
john hill your right i realize this is two months old but inferior props will snap much easier and will flex during high rpm situations, when your flying high you don't want the prop to break.
ok, seems to be nice video, but what about blade width, I have quad with 800kv (222W) motors but it fly better with 12x4,5 wide blade props than 12x4,5 ordinary blade props. So is there some identification what shows blade width?
Lauri K The wider the blade the more like a Slow Fly (designated as "SF" typicall) prop it will be which will generate more thrust. Really it comes down to what manufacturers are making. If you compare an APC, GWS, and Master Airscrew props they all have different blade geometries so they will all fly differently despite being the same diameter and pitch. If you know that your quad flies better with wider bladed props then look at Slow Fly props or find a manufacturer that makes a more standard prop that makes your quad fly the way you like and stick with those.
I have heard that when two propellers are installed in a straight line then if one rotates clockwise and the other counter clockwise it produces more thrust.is it true.
i need help..i have a Turnigy DST-1200 Brushless Outrunner 1200kv which max ovr at 16amp , i bought a 10x5 prop for it but im afraid its gonna over load the 20amp esc that i have..will me system work good enough for a couple flights?
Great video how do you know from a push prop pull prop and could you tell me what a good push prop for a 2400 kv/ and a 2200 kv motor pllleeeeeease want speed.
even 11 years ago they still made super high quality videos.
So true
I didn’t know they even had this good quality camera’s this good back them, not to mention mics
Love the early days of flitetest. Josh Scott and Josh Bixler was a good mix. Should get some of the past crew back on the channel every now and then.
@tjtg Pusher props are good for screw collets. Otherwise you chance them loosening when you reverse your motor.
Love rewatching flite tips!😜
Ohhh Yahhh
Just the tips?
With all these new quadcopter props I think it would be a great idea to revisit this for a video.
One thing I'm doing is learning to 3d print a propeller for my ww2 plane. It's a great small flier but it can't land or take off cause the factory prop is a huge 2 bladder prop. It does great but I want to play around with different propellers and see if it will work will a 4 bladder propeller.
2 years later.....did you have any success making props? I thought about making a silicone mold of a few props and then just pouring my own from epoxy, but probably too heavy.
@fulg Actually Ben, using a pusher on a rear mount will keep the collet from loosening.
We need this intro back for the newer videos!!!
Hey guys, love the show, but I want to correct something you said about pusher props. They are ONLY required when you need to compensate for the torque roll of multiple motors on a plane, or a quadcopter.
You do NOT need a pusher prop when the motor is mounted behind the plane; you mount the prop backwards (i.e. the numbers towards the motor) and reverse the motor direction, so the prop turns the correct way around.
Look at your Swift II, you don't have a pusher prop on it ;)
Cheers,
Ben.
Thank you for that mind opening detail, now I may be able to calculate the best prop for the speed I know I'm going to be within :)
2:38
This is one of the best vids and helps understand prop sizes.
@deeringdeluxe I know, that's what I'm trying to say ;) Props have a direction (CCW or CW), you have to mount them correctly (either forwards or backwards based on the motor location) to make sure the numbers on the prop are facing towards the direction of flight. Even if the motor is at the back of your plane, it doesn't mean you need a pusher prop, as long as the prop ends up turning the correct way. It will work fine with either prop type, you just pay more for pushers.
Really like the way both of the Josh(es) interact and and dynamics they bring. Very professional channel that kind of reminds me of Myth Busters. The RC industry needs your approach!
Another factor to bring to prop choice is the number of cells in the battery - which affects KV choice - and rated Watts of the motor and ESC. Also, ground clearance for the prop, rated RPM of the prop, differences between gas and electric props. I know its a lot but a multi-part series would be good. Great job.
How are u?
So this is what happens when you have a guy in speed and the other one high in the same video.
Absolutely love the "mustache on it's rear"...love it all guys. Thank you.
Everyone's beginning to get sick of HobbyKing and their outrageous shipping costs. Seems like no matter where in the world you're located, HobbyKing will find a way to do you in, essentially forcing us to purchase larger quantities in the hopes that costs subside. They are also very sneaky, not revealing estimated shipping charges, then expect us to register, then enter banking details only to eventually find that the shipping costs are generally far to high. HobbyKing, it's time you get your ducks in a row... and your props balanced! =P
Your Comment Caught my eye. I am an ""Old Goat"" Still Love the Gas engines, and what come with it, the cleanup.
Anyhow, I am in total Agreement with you on the ""Sneaky"" HobbyKing, """Gouges"" you to the last dime. I am still in the process of waiting from parts from China, to set up my balance charger to be able to charge more than one at a time, and the mateing cord is another cost. In the process of finding a CNC Hobby Router for up to light steel and aluminum, Best deal for what I can afford needs to be built by myself or come out of China, I Hope To God There is a G-Code For Dummies
Respectfully, Jim P.
At least now they let you do a estimate on order including shipping costs unlike they used toI got stung by the when I bought a bix 2 from them so avoided them but they have improved even got free parts with free shipping for some stuff but that's because I had store credit after being refunded for something I ordered that wasn't in stock
The best thing I ever did for the sustained enjoyment of this hobby was to ditch all connections to Hobbyking. Unsubscribe... close account... detatch from email lists. So now shopping elsewhere, the options have all improved, the prices are cheaper, the shipping is no longer sneakily increased with grossly over estimated weights, There is no more angst and pain when it comes to warranty claims with a stupid ticket system, the quality has improved enormously, and I can now buy more stuff.. Really Hobbyking are a textbook case in how to ruin a business through bad ethics. They will always have their place with an endless drizzle of temporary customers, but the counterpoint is what they could have been.. they literally hurl their customers at their opposition rather than being the biggest most successful business in the world.. Treating your customers with a broad stroke of contempt and treating them like idiots will always have the same outcome in the long run..
I informed them yesterday that product was faulty with in 2 hours i got a email saying they were going to ship me a replacement with no questions asked.
It was a back light for my dx6i which told them i had installed one before and had no problems.
Got email this morning saying its been packed and awaiting to be shipped
I must admit they have improved alot
I only buy from them because they have warehouse in my country (UK) so they shipping don't take as long.
HK sell a lipo balance voltage alarm for £3 (gbp) + shipping
Ebay same thing for 99 pence + free shipping
Told HK to beat that for price lol
I have been using Banggood for my R/C stuff. Only thing is, it takes them 2 to 3 weeks to get it to me! But, it's FREE Shipping, and NO TAX! They beat everybody in Drone costs and parts, too!
"Like a mustach on your rear" LOL you guys really are making cool videos, keep them up!
Finally someone who explains this to me! Thank you!
@deeringdeluxe It does! I made the mistake flying a Swift 2 with the prop backwards to what it should be and it really feels sluggish in flight. A prop mounted the wrong way will fly,yes but it will totally be less efficient and less thrusty. The motor direction defines whether it will move forward correctly, but you should never fly with a prop mounted backwards if this means the wrong way is pointing forward in flight.Don't forget props are shaped into a curvy surface that works like a paddle.
Pretty good overview for a short episode, nice work!
Great video guys! Cant wait for the next one.
would you guys pls do a video about prop adapters, almost nobody includes an adapter when you buy a motor so it is a headache to look for the proper shaft and prop for the motor. Thank you
Indeed. Makes me sick! SIck! truely hate that.
look on ebay!!!
the adapters come with the prop (or should, always look for the adapter when buying prop...they are just little plastic parts) i know you know this already, but for those who don't.
You only need a pusher prop on either IC motors or where counter rotating is required. Electric you can always make the motor run either direction
Y'all should do a video choosing the right props for quads
Geometric pitch is the design of the prop and the amount it should move forward in a perfect world. Effective pitch is the amount of forward movement you actually get.
Another great video guys! Keep up the fantastic work and continued success! Have a great day and happy flying friends.
I have a suggestion for all of you that are confused about props. Order a range of props and then double each order just in case you like one or more. Get your fuselage on the bench and your power meter, and after carefully balancing each of your examples, run it thru the paces. That will give you a more than a rough idea as to the max diameter and bite.Make note of power consumption for each set-up and simply deduce "Dear Watson" ...and then take no more than three props to the field to test.
@flitetest Good point. I still don't think they are worth the expense for single-motor crafts; use lock-tite on the collet (or a prop saver) and don't spend the extra money for pusher props ;)
Cheers,
Ben.
I REALLY LOVE WATCHING YOUR "FACE" ITS SO MUCH MORE IMPORTANT THEN WHAT WERE TALKING ABOUT! and your trying to start a business?
Cool Intro, FliteTest!
This was so helpful. now i know what prop to put on my plane
Hey Josh/Josh need a videos on how to choose a motor... How to match an ESC to a motor.........
I put 18 inch propeller on box fan motor
Can you guys show us how to use the prop balancer?
And I was expecting to see some rules of thumb and principles of choosing props, motor Kv, number of lipo cells in series, etc.
Ah man! I bought a normal APC 6x4 for my bixler. I didn't know I needed a special propeller.
I heard that I just needed the accessories kit for the NTM motors.
As the guy on the flight line that got elected to straddle the new 1200 horsepower turbine to adjust the variable pitch prop governor, I can tell you that all fixed pitch propellers have a narrow efficiency window to operate with. Airspeed and pitch is everything. If you change the pitch and/or diameter, yes, it's possible to go faster - within limits. Balance the tradeoffs in your choice. A high pitch propeller gives you a long roll on takeoff. A low airspeed, heavy biting high pitch prop will likely never exceed 60MPH. Propeller formulas always include airspeed because of it. For any given propeller, engine and airframe combination, there is a speed at which the propeller noise is at a minimum. A noisy prop (too fast, too slow, bad wind angle, turbulence, etc.) is eating your power wholesale with a reduced return in thrust by comparison. A propeller blade operating in the wake turbulence of another propeller blade is definitely at the wrong airspeed. Drone props are designed for 0 airspeed. Insufficient airflow across jet engine blades and the compressor will stall sometimes violently and wreck the engine. The length of the prop blade is directly proportional to the work required to keep it balanced and the amount of grass your cutting on taxi. In any case, vibration from any source is bad and noisy. There is no such thing as no damage from any prop strike at max rpm.
Based on what's usually available to most people, it's very likely that you have a choice of three props for your given combination that will change performance; and three more if the blade count changes. Choose carefully and you maximize flight time. A goal nobody argues with ;)
Great informative video. I have a dji phantom version 1 I'm currently using the standard 8043 plastic props. I flying with dual 2800 mah 3s lipos and a gopro hero 3. I'm wondering if I should upgrade my propellers to the carbon fiber 8 inch props due they are more stiffer and I'm carrying a little more weight or continue to fly with the standard props. Let me know whar you think.
See, that's the explanation a noob like me needs! Thanks a lot for your great videos guys!
Now please do one on how to actually balance your props :-)
enjoy watching these videos, I would like to see a segment on finding kv rating and finding the amp rating to match also the esc
Oh... now I get it. CW spinning propeller pulls the airplane and CCW spinning propeller pushes it. LOL
Do you think spinners are necessary for electric rc planes? I have a Turbo Timber Evo. and it looks like the ESC would get better air flow if the spinner was not installed.
Love your channel guys. I'm interested in controlling the noise that the props make. I assume there is some kind of relationship between RPM, prop length, pitch, thrust, and noise. How do you find the right balance between thrust and noise and will quieter props be more efficient? Would love an episode on quiet multi-props. Can a quiet tricopter be made with large props and slower motors with more torque?
I'm building a foam mig 29 jet
The wingspan is 81 mm and the weight is 31.1 oz
The battery is a lipo 2200 mah 11.1 v 3s
The motor I'm using is a A2212/6t 2200 kv and the propeller is 6x4
My question is do you think this setup will work or do I need to change something. Any help would be much appreciated
Whenever it comes to aerodynamics, I'm clueless where to begin. It's way more complex than my financial problem....
It wasn't long ago that newbies or youngsters believed a bigger prop was better. I lost count of guys asking what was the longest prop a quadcopter could handle. It seemed a quad with small props wasn't "cool". No amount of advice regarding efficiency etc. could shake them. Such talk was old people's talk, in the end I gave up trying and told them to use 11 inch props as long as they were OK with them hitting the prop on the next motor. They were actually buying quadcopters according to the size of the props. I'm no longer in the business so I have to wonder if it's still uncool to have small props. Or have I got it wrong by buying my props according to motor specs?
Well WeSmashRC you asked a question here and although it doesnt look like anyone tried to help you, maybe you can help others by telling us how you corrected your issue. I mean thats if ya did? I hope ya did. :)
Great video, thanks.
Is it correct that a larger prop for a slow flyer such as a 3d model is better suited with a less cell lipo but with more mah?
Could you please do a video on prop adapters and how they are used.
Thank you for evolving little Josh through his dumb Josh, special Josh and slow Josh phases. I kinda like the new wise-guy Josh..."rear end mustache" 1:40. I like it.
I'm just kidding...great work!
I learnt a few things in thie episode! Nicely done! :D
Questions For You Guys
A) What was your first computer radio?
B) What is the CG on the ft viggen swappable
Nice work guys my q any stable rule for propller size with size and plans whight thank you
what are the differences between props for forward flight/ fixed wing and props for quadcopters?
Nice work again guys :-)
Hello, how are you? Wonderful details on props. I would like to know that can I switch to single blade prop from a 3 blade prop. I have 1100mm fms typhoon.
elder josh looks at little josh like a proud dad
I've a 1000KV brushless motor
so what should be the propeller size, which will give the most speed and how much it will effect my F117 RC plane??
hi josh bixler. should i use prop-savers on my scratch foam trainer. it has a 35" wing-span, and a 1534 kV motor, and a 7x6 recommended prop. even thought we'll probably use a 8x6. What say u?
tell that guy to stop eating paint chips and smoking buds before the shoot lmfao!
Do they define CW vs. CCW viewing from in front of the plane, or viewing from inside the cockpit of the plane?
@flitetest The forces involved are the exact same though and if the inner spacer / ring or whatever you'd call that plastic thingyfoo fits correctly, you won't notice anything. It's like changing the position of a washer to clamp a prop properly, but still keep it between two nuts.
In other words, the influence is totally and extremely negligible. ;-)
love this intro and miss it too :(
hmm for multirotors i was wondering if there would be advantages to placing the motors on the bottom of their respective boom, facing downwards instead of up and then flipping the prop. i would think less thrust would be lost due to air current impinging on the boom below it. basically it would probably make a low pressure area right around the boom as air flows around it slowing it's downward speed to move transversely to move around the boom thus reducing the net flow or air velocity in that area and then reducing reaction force on the prop and thrust. i guess the trade off is the suction area ahead of the prop. maybe the boom being in front of the propeller it would cause reduced supply of air to the propeller and have even worse effect and this is why nobody mounts the props on the bottom side of the boom?
the intro gives me...the thing when you get cold and your skin like does the thing...its good...
ikr the music is so cool too, and its just random shots mixed together :p
Can you please give me a tip on what propeller should I use as a rotor of my rc AVENGERS helicarrier project
Good video
I am looking to buy a RVJet plane I just couldn't decide which propeller and motor I should use. Do you have any suggestions?
sooo, what's exactly the difference of a pusher? Has it a special form? Or it is just CW/CCW?
Now every time I see a pusher prop I'll think BUTT MUSTACHE! Thanks guys! LOL
What propeller i need for Turnigy D2830-11 on 4S? (Tricopter, 1000grams) cant find 8x4 that isnt slowfly. 10x5 is too "heavy" for 4S on those motors.
Hello, recently I broke a 2300 Kv edf ducted fan, and I am thinking of reusing the motor with a propeller for a plane. Is it possible or it will underperform severely? Thanks in advance.
Hey, I am a hobbyist can you tell me how do you select the motor for rc aircraft? How much thrust to weight ratio do you choose ?I have built a plane of around 6kg how much thrust is required?
Just curious if this is an exact science or rather hit or miss regarding choosing engine size (and appropriate prop dimensions) for max performance vs max flight time for planes and copters. Larger motors turning larger props at slower rpm use less power than smaller, high revving motors with smaller props, or is it the other way round....?
Hi I have a 50cc electric motor. I am running a 22+10 eflight prop. It is very quiet. I am looking for a loud prop sound? Any suggestions? Thanks
@lpbug Use blue loctite
@deeringdeluxe There's really no need to respond to me like that, I even stated the motor direction defines which way the thrust will be.
But regardless of that a prop really should always face the correct side, as that's when it will work best (you can lose up to 50% thrust if its mounted backwards). A prop that's on a pusher plane will function like a pusher prop, even though you'll have to put it on backwards compared to the motor itself. So what exactly is your point?
I miss this era of flitetest :(
Hey guys, I'm wondering what would be better to throw in my Carbon z cub ss (v2) eflight power 60 (400kv or 470kv) and which size prop?
1:40, pretty sure the prop needs to face forwards if its on a normal plane or a pusher plane, i use CW props on my pusher plane and it works fine and you can use CCW props on either type of plane, just reverse your motor to suit, you need to explain what your talking about, not just say it spins the other way cos it goes on the back because thats just flat out wrong
.... no no no. this is just wrong. propellers have a leading edge and a trailing edge. you CAN reverse your motor and make a standard prop(ccw) do what a pusher prop(cw) is designed for, but its not efficient because the standard prop is indeed running backwards with the trailing edge out front instead of the leading edge.
then entire point of there being two types of propellers is for you to use to proper one for the proper scenario. please do not go around encouraging people to use the wrong prop for the wrong job. running a prop trailing edge first is a good way to cause damage to your plane, propeller, or yourself
yes i know the leading edge always needs to spin the correct way that was my point, you always need to have the propeller facing forwards (the side you see the size and pitch written on most props) my point is you can use a ccw prop if you reverse your motor so the leading edge is spinning the correct way while the front of the prop is facing forwards weather its on the front or rear of the plane. the reason for my comment in the 1st place is why did flight test mention the ccw prop and not go into any detail?
Yeah no need for pusher props in electric planes really, just flip the prop and reverse the motor but in nitro applications you do as the engine cant run backwards
@@mark675 Brilliant comment!
I have designed and built a 44in wing span b17, i need help on choosing props and motors. Its made out of foam board in true flite test fashion
Hi I am having a sbach 342 Balsa wood aircraft but I am confused in choosing propeller for that .. pls help me choose the wright propellee
very very interesting video.
are 9*6E propellers the same as 9060 propeller.if not then pls tell me the difference
Hi,
I wonder what device that you used to test the thrust load, which the propeller can produce. Could you share more info about that device? Thanks
THE INITIAL EDITING THAT TOO 14 YEARS AGO...DAMN,,,,
so there are cw props and you say the ccw props are made for pusher planes, why cant you just reverse your motor and use a normal cw prop on a pusher type plane?
If I want to fly a quadcopter 20 minutes which motor, propeller and battery I can select ?
which propeller do i select for 500 kv motor slow flying plane weighing 20 lbs(10kg approx)
this was my question that i found no where else that "is the pusher propeller different from tractor one". so basically if you rotate the tractor propeller the other way than for which it is built, u get a pusher propeller, right?
So heres an idea: multiple electric motors turning one shaft and rotor or prop.
The idea being to substitute electric motors in place of cylinders, arranged in traditional "v", boxer, radial or in line cylinder configurations. I dont think it would be very efficient, but im wondering how much horsepower, torque, and rotational speed is obtained........ Like is said just an idea
Jayson Odom it erupted be a constant dive geared system and would be highly inefficient and a pain in the ass to get all the electric motors timed to each other.....you'd burn up motors so fast you'd be refinancing your house to buy more....that's a reason why nothing is built like that.
I bought some cheap props from a seller on eBay in China last week for my DJI Phantom. I broke my original props that came with it and they are expensive to replace. When I received them they looked the same but were thinner and the tips of the propellers were slightly bent downward. Are these safe to fly my $1200.00 quad with? They didn't seem to preform very well when I tried them, it drifted a lot. Should I just fork up another $40.00 for original DJI props, or can you recommend some other solution? I like your show and thanks!
If I had a $1200 quad, i woudnt take any chances. I know nothing about propellers or quads though.
john hill your right i realize this is two months old but inferior props will snap much easier and will flex during high rpm situations, when your flying high you don't want the prop to break.
Can I use a pull prop and then attach it in the opposite way to make it a push prop.
ok, seems to be nice video, but what about blade width, I have quad with 800kv (222W) motors but it fly better with 12x4,5 wide blade props than 12x4,5 ordinary blade props. So is there some identification what shows blade width?
Lauri K The wider the blade the more like a Slow Fly (designated as "SF" typicall) prop it will be which will generate more thrust. Really it comes down to what manufacturers are making. If you compare an APC, GWS, and Master Airscrew props they all have different blade geometries so they will all fly differently despite being the same diameter and pitch. If you know that your quad flies better with wider bladed props then look at Slow Fly props or find a manufacturer that makes a more standard prop that makes your quad fly the way you like and stick with those.
The diameter is the length of the prop from tip to tip.
I'm interested with the combat wing's motor mount. Please tell me where did you get that.
I have heard that when two propellers are installed in a straight line then if one rotates clockwise and the other counter clockwise it produces more thrust.is it true.
i need help..i have a Turnigy DST-1200 Brushless Outrunner 1200kv which max ovr at 16amp , i bought a 10x5 prop for it but im afraid its gonna over load the 20amp esc that i have..will me system work good enough for a couple flights?
Great video how do you know from a push prop pull prop and could you tell me what a good push prop for a 2400 kv/ and a 2200 kv motor pllleeeeeease want speed.
I also need the ans
i have Rc Helicopter Engine Firewolf F163 Side Motor what propeler should i use to make rc plane? i want to make rc plane with 2 motor..
Hi @flitetest - where did you source those miniatures propellers from? I would love to have them. Any link to buy them all?
what is the best prop size I can use on my x alien 550? im using sunnysky v2216 800kv, 5000mah 3s battery, auw 1600g.