I'm curious to know the operation of the auxilary elevators and rudders on the scale corsair, as I would like to add them into my plane. I am not sure of there function, if they are fixed adjustable, or tied in with the movments of the actual rudder or elevator, as they both incorperate them on the full size corsair.
DM

Do you mean the small "control surfaces" on the main control surfaces? If so, those are the trim tabs. You deflect the trim tab the opposite direction you want the control surface to go to correct for the airplane not wanting to fly straight. The little tab puts pressure on the larger surface and it deflects the way you wanted it to go.

You could make them functional... but it would be a heck of a control linkage nightmare to do it. The only way I could think of is using the 1/32 wire cable in a sheath type pushrod, normally used for 1/2A and gliders. this stuff could still work for the little trim tab when the main control surface was deflected. There would be very little point to doing it though... We trim with fine adjustments of the main control surfaces on the models.

Darren:
On the Corsair, they were called Flettner, or booster tabs. When the elevator went up, the tab wnt down. Takes the load off the stick. Something like power steering. I have them on a 1/4 scale Corby Starlett and they are quite effective at taking the load off the servoes. Wouldnt be feasable on anything smaller than a .60 size plane. Corsair has them on ail, elevator and rudder with a trim tab on the left aileron.

Thanks, I'll most likley put them in, but not functional, just to make them look scale. I'll probably add the horns on them, and the linkage, and a fake push rod into the control surfaces.
Thanks,
Darren

Thanks that makes sence, wasn't sure if they were functional
Darren

testpost

I have heard of people putting them on aerobatic planes to reduce the servo load. Sounds good.

When setting them up on the Starlett, I kept going one hole at a time in the boostertab horn. When it hit the magic spot, it was like you put the next size bigger, faster servo in it. You don't want to go to far,as it will try to drive the servo to the to the limit. I read that somewhere, so I didn't go any further.

Gord,
Do you have any pictures of your setup and linkages you mention?

Montague:
I'll try to get a picture up.I usually get a buddy to do it for me. Computer illiterate Anyway, control tab is around 10% of the control surface. Install a small horn on the bottom TE of the wing. This plane has a thick wing at he ail. hinge line, so it is close to the surface. Another on the LE bottom of the tab. On the Starlett I used a 2-56 wire with a nylink for adjustment. I'm sure, with a smaller plane, you could use a smaller wire as there is not much load because of the area. As it turned out, with full up elevator, the tab is parallel with the line line of flight on this particular plane, to give you a ballpark throw.