Testing ducted fan quad, flies great. My intention was to build a tricopter but just had to see how a quad would fly with 90mm EDF's. Also tested as a "V-Tail" in the quad configeration, it flies with a 15 degree rear facing angle and is more sensitive to inputs.
You need to be a member of diydrones to add comments!
Comments
To control yaw I angled the EDF's, I put in excessive angle for the video so it would be very obvious to see. It's amazing what can be accomplished if it isn't over engineered.
Add wings and rotate the fans to transform to a plane? Sounds like fun, good luck.
Ed
How much work would it be to add wings and rotate the fans and transform into a plane for flying ?
Good work and nice video bro.
How did you manage to achieve yaw during flight?
It's my hobby, I do it for fun and experience (and because I can). On the Avatar both front fans rotate like a tricopter rotates the rear unit for yaw control. There is no advantage to this except it really looks cool. EDF's are fast and extremely responsive, people comment that they look so light in flight when they are heavier then their prop counterparts. I don't worry about counter-rotating ducted fans at all, I also angle my propeller motors about 3 to 5 degrees. I use the cheapest fans I can get, don't know if the more expensive fans are any better. The main disadvantage is shorter flights, they do like the amps. Ed
Looks great! There is so some controversy in online forums about ducted fans versus propellers, but the general consensus seems to be that ducted fans offer less efficiency and shorter flight times. What would you say are the advantages/benefits of using ducted fans, aside from safety? And have you tried finding counter-rotating ducted fans to eliminate the necessity of angling the fans?
Hey Ed, any progress or updates on this?
Ed, could your heat problem be related to the onboard BEC, rather than the actual MOSFETS driving the motors?
Or, perhaps the problem is due to zero air movement over the heat sinks?
Some basic physics....
A ducted fan is basically exchanging momentum with the air ....
tyhe larger the fan diameter for a given thrust, the lower the velocity of the exit air.. so bigger prop, fan whatever is more efficent...
moving 1 lb of air at 100ft/sec will give the same thrust as moving 100lb or air at 1 ft/sec
But the 1lb of air at 100ft/sec will use 100 times as much power... small ducted fans will always be power hogs.
-
1
-
2
-
3
-
4
of 4 Next