Wing Incidence
 

I am building my own design 2 meter Pattern Ship and I need an idea on how much wing incidence I need to have. Its going to have a one peace wing?

Many thanks
Paul

RE: Wing Incidence
 

What airfoil will you be using ?

What stab airfoil will you be using ?

Will talk lift lines and engine thrust lines next.

_________
Schpankme

RE: Wing Incidence
 

Very broad question until a lot of questions are answered but it will probably be somewhere between 0 and 1 degree positive incidence. Is the wing incidence going to be adjustable or set?

I would think there is a little flight trial and error to getting it just right. Have to actually fly the plane and see what kind of trim/cg adjustments the plane needs in level flight vs. what it does in vertical downlines. Then adjust the elevator trim, cg and incidence until you get all the flight characteristics you are looking for.

Unless one of the resident flight engineers responds, very generally speaking I would say start at about .4-.5 degrees positive and then adjust until you like it.

Something we have gone to, maybe everyone else has too, that you might like is using a digital level to set incidence instead of a laser. Just get the GP laser incidence meter get rid of the lazer and mount a digital level on top of the frame. Put the plane in blocks, adjust the plane so that the horizontal stab is totaly level, lock it there and then go to the wings and set the incidence.

RE: Wing Incidence
 

Big Ned is right. I think you will be happier if you can setup an adjustable stab and wing. Until the plane is flown, it will be a bit unknown. The fuselage shape can play a big role in the final trim requirements too. In my experience (limited) I was happy that I had adjustability on both the stab and the wing. In my first design I ended up with 0° on the wing and about -.25° in the stab. At this point I am happy with the trim. Be prepared to fly many, many trim flights, perhaps even adjusting your engine thrust too.

I hope to build a new design again this Winter and I will definitely build in some adjustability on both surfaces.

Good luck.