Basic Aeronautics

[Brian Clarey]

Hi Ken....That particular airfoil is remoniscient of an old " Jadelsky" profile. Those profiles were of bonded shapes, glued together and presumably hand finished. Don`t think that I`ve seen one in the flesh....But it could be constructed in the manner already discussed leaving out, say every third rib and leaving the skin off on the underside, from spar to trailing edge! The trailing edge should be strengthened by perhaps brass tube the diameter, being the thickness of the skin. The COG looks like it should be around 40 to 50% of the chord. That suggests to me that a Lifting Tail Plane would be required to balance the model....A lifting tail plane has a greater span than the usual tail feathers and a lifting section!!......this jadelsky profile is a floater not a fast example.
Ken, you might let me know what your plan is for this model.

Brian C.