Hi,

I'm very slowly getting through this nice kit, and have just rolled over the 1st wing in preparation for sheeting the other side.

The directions point out that the wing is easily warped and recommends a 1" board under the trailing edge to help assure that it's built with no warp. The problem is that this wing tapers both in thickness as well as chord, so the outer edge actually sits about 3 mm lower than the inner edge. (This is easily checked [from both sides] by measurements.)

My plan was to account for this by using that 1" block, but have it propped up on the inner edge by the roughly 3 mm.

Does anyone else do this, or is there a reason to build a warp into the wing (which **should** happen using a flat 1" distance across the trailing edge)??

Many thanks for thoughts!

Cheers,


Kenward

follow your prints. is what you are building is called washout. it makes th model more stable and wont tip stall as easy compared to a "flat" wing... good luck on your build...

I agree just make sure that the trailaing edge support contacts the traling edge the same distance in from the trailing edge from the inboard to the outboard of the wing. This method works great and the washout seems just right to me. I have flown mine for 3 seasons now and I am going to build another as this is such a fun plane and nice break from the scale flying planes I normaly fly. Check out some of the mods on this plane, side mounting the motor is a great mod as it keeps more of the fuel from entering the canopy hatch.

I am currently building a SSE and I agree with you that the wing will not end up straight.

I do not agree with the gentleman who told you that what you are building is "washout." If you follow the instructions as written you will be building "wash in." That is, the tips will be at a higher angle of attack than the root. This can lead to premature tip stalling. However, the SSE seems to fly fine with it. Most likely because the full span ailerons put negative camber into the wing tip when mounted to the wing. Wash in may even be desirable in an aerobatic model as it may lead to quicker snap rolls. Many electrons have been spent on this topic. Check out the following URL for the specifics.

http://www.angelfire.com/indie/aerostuff/washin.htm

I'm endeavoring to build my wing straight. To do that, I used a board that was 1" thick at the root and 0.86" thick at the tip. Check the math for yourself and see if you arrive at the same values.

Wishing you blue skies,