I'm not precisely a newbie, but it's a trainer I figure it might as well go here.


Has anyone done wing bay mounted aileron servos(ie in wing instead of what AMA's publication did with the torque rods inside the trainer).


I'm coming back after a year out of the loop, and I'm recovering and converting this plane to electric. I want to remove the ailerons for the covering process, as I've already done with the elevator and rudder, but doing so will involve cutting the torque rods and/or breaking the ailerons. I would prefer to go ahead and convert this to a more conventional in wing set of servos, but im curious if anyone has done it with this plane and has advice on doing so.

i think I know what you're talking about, pics would help. Single aileron servo is by no means unconventional

What I meant by "more conventional" was avoiding the method many are taking of sticking two servos in the center and using the torque rods already in existence to drive each aileron individually. While looking cleaner, and being much simpler(since there is no removal of covering involved), in my experience, that is not the best way. I would much rather have the servos centered in the aileron. Think.....well any sport plane using dual ailerons in the wing externally (four stars come to mind(the 60 and 120), as do the kadet senior ARFs).


Mainly I was looking for pictures of anyone else who may have done it, as well as feedback on there results. I have torque rods modified now, I will have to wait until tommorow when I can get another sheet of lite ply and can use my saw(5:21AM is not a good time to run the chop saw) to finish the mounting plates.

i havent done this to this model but it would be the same. if you are converting it to an eletric a single servo might be a better choice as far as weight goes.but if you have the alerons and covering removed the conversion is simple.just use some light ply and 1/4 square balsa to make servo trays in between the wing bays on equil distances on either side of the wing,usueally about 4 bays out or middle of each side of wing.you will have to make holes for the servo wireing if there isnt access through the ribs.i would use smaller servos due to weight.i did the same thing on a 4star 40,and pt60.both were glo fuel though.

I have a trainer with dual aileron servos mounted in the bays. It works great, no problems at all. I did the modification as I built the plane, not as a conversion so it was easier for me to do.

I had considered that as far as weight, but the addition of the spare servo won't throw me off by much, I was already overpowering the plane by a small amount(I have a power system capable of handling a 5# or so 3-d aircraft ) and one s3004 wont make to much difference I don't think, and I would like to have flaperons and an air brake function with it. I believe all the ribs through to the root have holes on them, I'm going to attempt to install paper tubes for convenience sake and find out.

Ok I have my light ply plates, and my 4 span pieces for the servo to screw into fabricated, but now I'm unsure on 1 issue.



I intended to glue them in place with some thin CA since it would be the lightest option(I don't hae any medium at the moment), but am unsure as to wether tacking them with epoxy would be a good idea as well?