RE: Pfalz DIII resources -- Photos, Drawings, Plans, etc.
Trev, thanks for posting these. After looking carefully at the various drawings and photos, two aerodynamic features caught my attention:
1. The tailplane appears to have an inveted airfoil shape, i.e. flat on the top and slightly curved on the bottom.
2. The lower wings TE in many photos appears to curve. But upon closer examination (and a little informal photogeometry, this is caused by the fact that the lower wing have a small about of washout built in such that the outboard TE tip of the lower wing is slightly higher than the inboard TE. Combined with the rounded tips of the DIIIa, this creates the effect of a curved lower wing.
BTW, on some photos I could swear I see something like that famous Halberstadt droop!
PS. Is there an established way to build in wing-tip washout?