Ok so fabric covered it is! I'd also like to do pushrod ailerons but honestly, I don't know how to go about building the system. I understand the basic idea of it, just no idea how to build it.davevon wrote:I agree, just covering the ailerons with plywood would add a lot of weight exactly where you don't want it. I guess it might be possible to re-engineer the ailerons to use maybe 1/32" ply and keep them the same weight. Going to that extreme you might as well go with molded carbon ailerons.
My question is why would you consider the torque tube drive system? In a new build I think the disadvantages would outweigh the advantages... What are your plans for the aileron hinges? If you're thinking torque drive tube just attached to the inboard rib of the aileron you'll need to have molded carbon aileron to be stiff enough. The flexibility of the wing/aileron system plays an important role in how high or low your flutter speed will be...
The longer ailerons, especially constant chord ailerons should have less drag per roll rate vs. the shorter, tapered ailerons. They will have more drag as the roll rate goes up. They will also noticeably improve low speed roll rate. Constant chord may be more of an advantage than just longer ailerons. The tip of the wing is where you'll get the most advantage from the ailerons.
My Laser is setup for twin torpedo fuel tanks under the fuse. There are square vertical tubes welded in the lower fuse to accept square insert tubes of the tanks. There is a fitting in the belly of the fuse that can be capped for the tanks to attach to. The fitting is plumbed to the auxiliary port of the Christen wobble pump. Pretty simple, I haven't had the need to try it yet... The Staudacher's and Panzl's all have fuel in the wings.
Before committing to anything on the wing you may want to get a hold of Tom Edwards in Colorado too. He has a lot of Laser wing and retrofit experience.
As for the length, I'll be doing 107" (thank you for the explanation). I'll look at doing constant chord but really like the shape of the original wing.
Thanks for the explanation, this is all new to me and I'm trying to figure out the best way to do it right the first time.