I am looking at the Paul DelGatto article in the Feb/Mar 63 issue of Flying Models for his semi scale stunt version of the B-25. The photographs do no show any indication of the "gull wing" dihedral that was a characteristic of the full scale aircraft. The photographs as well as the plans indicate a straight wing, as in no dihedral. The wing thickness tapers from root to tip, much like a "typical" stunt design. Given this is designed for stunt to look like the B-25, the lack of dihedral does not appear to detract significantly from its appearance, unless you are a true desciple of Al Rabe. In fact, the plans show the center spar layout with no dihedral whatsovever or any indication that there are dihedral breaks on the center line of the wing or at the nacelles. Furthermore, there wre no provisions whatsoever to allow for dihdral breaks for the flaps at nacelles, though he does show a split horn at the center section for the swept forward flaps (which in my opinion is not needed - this can be done either with a "Lucky Box"/single horn or better yet a single horn and NO Lucky Box.) His written article does not mention anything about dihedral, but in keeping with what he wrote, aside from keeping a scale like appearance, he desired to keep this simple.
The plans show the bellcrank and leadouts at the chord center line. The article does not mention any particular attention to the leadouts relative to the tank. However, the tank does set mostly above the wing chord line, it would not seen to be very much of a problem to have theat fron leadouy pas below the tank and hve the leadout guides to be slightly below the wing tip airfoil dhordline.
LeRoy Black of Phoenix built one of these and flew it several times at the Vintage Stunt Championships several years go. You might want to contact him regarding the question of leadout position relative to the fuel tank and any questions you might have about the dihedral.
Good Luck
Keith
Topic: B 25 (Read 3385 times)