Scooter The White Rabbit
Active member
That is the question. Though looking at most Flite Test foamboard aircraft wing designs where the underside and wing spar do not reach the tip, is this not pretty much a Hoerner "Style" wingtip already?
Case in point is the wings on the FT Guinea Pig. The front edge is curved with a sharp trailing edge, and thin because the bottom with spar ends several inches short of the wingtip. (A SB-6 and Parker version of Hoerner wingtip). Is this the idea when these wings are designed?
My only... problem with this wing is the open holes exposing the spar and internals. FOD and moisture are not friends of such light aircraft, and/or foamboard. But if I enclose the wingtips with shed paper during the build from other areas such as the nose, do I run the risk of fouling the current (if any) positive effects of this design?
I do plan to test this on an stock Guinea Pig I own, and on a modification still in the design phase to be known as "Mama Guinea". Mama Guinea is planned to have a 7.13" X 7.13" cross section fuselage. A width increase of 1.67". Thus I have planned to lengthen the wings to 60" from 58" through the center to keep the nacelles and spar end to wingtip spacing equal to the original. This will also increase the wing area from 522 inches squared, to 540 inches squared. By thinly gluing external foamboard paper from the spar end bottom plate out to the curved external outer edge of the wing, this in effect will seal the wing, and formally create a Parker version Hoerner wingtip. (Also including NAV and Anti-Collision lights).
I would appreciate any and all comments or questions concerning this. I will include a design drawing of my modification upon request.
Case in point is the wings on the FT Guinea Pig. The front edge is curved with a sharp trailing edge, and thin because the bottom with spar ends several inches short of the wingtip. (A SB-6 and Parker version of Hoerner wingtip). Is this the idea when these wings are designed?
My only... problem with this wing is the open holes exposing the spar and internals. FOD and moisture are not friends of such light aircraft, and/or foamboard. But if I enclose the wingtips with shed paper during the build from other areas such as the nose, do I run the risk of fouling the current (if any) positive effects of this design?
I do plan to test this on an stock Guinea Pig I own, and on a modification still in the design phase to be known as "Mama Guinea". Mama Guinea is planned to have a 7.13" X 7.13" cross section fuselage. A width increase of 1.67". Thus I have planned to lengthen the wings to 60" from 58" through the center to keep the nacelles and spar end to wingtip spacing equal to the original. This will also increase the wing area from 522 inches squared, to 540 inches squared. By thinly gluing external foamboard paper from the spar end bottom plate out to the curved external outer edge of the wing, this in effect will seal the wing, and formally create a Parker version Hoerner wingtip. (Also including NAV and Anti-Collision lights).
I would appreciate any and all comments or questions concerning this. I will include a design drawing of my modification upon request.