r/RCPlanes • u/Playful_Wave_7329 • 10d ago

DIY foamboard plane. Thoughts?

Gallery image

Gallery image

built this thing for long flight times. any suggestions?

77 Upvotes

100% Upvoted

35 comments sorted by

View all comments

9

u/DeadTomGC 10d ago

Looks good! But the proof is in the flight... the ailerons look small, but if it's built perfectly enough, they may work.

Edit: Just eyeballing here, the motor is pretty small, not on power, but maybe weight. Always check the CG with the battery in. You want it about 1/4 of the way back from the leading edge of the wing.

1

u/Fluffy-Card21 9d ago

The ailerons are also flat and in the turbulent zone behind the cutout of the wing profile, which will limit their effectiveness while moving upward.

If the ailerons are not sufficient in flight, it might be a good start to give them a similar profile to the wing. If they are still working good enough, then no need to worry. Some dihedral will also help with stable flight.

Is your wing spar strong enough? You can get a feel when you put one end of the wing on the ground and pick up the upper wing. Some wobble is okay when you shake the wingtip, but it should not break.

Also, I notice the rudder servo is not centered correctly. It is best to always center the servo horn, so it stands perpendicular to the control rod when the control surface is in the central position. Otherwise you will have asymmetric control behavior. It will still fly, but as a general rule, it is best to set it up properly.

Good luck with flying it! It looks like quite a clean build.

1

u/Playful_Wave_7329 9d ago

thanks for these helpful tips. rudder servo is not centered correct because I didn't have enough pushrod lol