I'm building a Pica Duelist (low wing twin) that has 2 degs positive incidence on both the wing (symmetrical) and hor. stab (flat), and 8 deg down thrust. I've built similar single engine planes with the positive wing incidence but not the positive incidence on the stab and no down thrust.

Any insights on what this design is trying to accomplish?

First off are you measuring the wing's incidence angle using the straight line that runs directly from the leading edge to the trailing edge?

It may also be that since this model was intended as a fairly neutral handling fast sport model you are intended to fudge in the longitudinal dihedral or decalage with a nudge of up trim.

The downthrust angles seem overly high but it may be due to the engines being located close to the CG where the thrust offset requires more angle to achieve the desired effect. On top of that the thrust lines are so low that this may also produce an upwards pitching couple. Still, 8 degrees does seem like a lot.

Yes. Though it occurs to me that I'm measuring to a line on the fuse that is the long crutch in the assembly that is almost arbitrary. If the wing and stab are on parallel planes that could be considered 0 deg incidence if the fuse is just along for the ride, after all the engines are on the wing.

Interesting.

That gives me something to think about. It's just so hard to build something that's so different from what I'm used to that the urge to make it resemble the usual is very strong.

Thanks for the insight.