cwahl
Posts: 17
Joined: 8/28/2005
From: New York,
NY, USA
Status: offline
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I don't intend to steal any of CCRC1's thunder, but I have PDF files of both the Grid Leaks Ugly Stick plan sheet (not from the magazine article, but scanned from full-size plan bought from John Pond several years ago), and also the two-sheet plans from the Jensen (not Jenson) kit. I don't think there are any copyright issues for either one of these. All the sheets are about 36" x 48", within the printing abilities of a shop like Kinko's. Neither one is absolutely perfect dimensionally, since they were scanned using a roll scanner from my own plans. Anyone who wants a copy just drop me an email.
The Grid Leaks plan doesn't seem to indicate a recommended wing dihedral, or how the wing halves should be joined/reinforced. Possibly, the "original" had no dihedral, in which case the spar doublers could have been the joiner material -- just straight through the center joint. I can't decide from looking at the Grid Leaks cover photo (cool; thanks for that!) whether that model has a flat wing or a bit of dihedral.
In the Jensen kit (a beautiful thing, and an aesthetic experience to build), all the spars were tapered for scarf joints at precisely the dihedral angle, which overlapped each other -- the doubler spars were scarfed in one wing panel, while the full-length spars were scarfed in the other. One assembled the complete spars before starting wing construction, and then built the first half with the spars hanging off one end of the building board! This was an ingenious method, though it made it hard to change the dihedral angle -- you couldn't just cut new ply joiner plates as in most designs. But you might have been able to build it flat by flipping one piece over when assembling spars. The Grid Leaks plan seems to have the same spar arrangement and stock sizes, but no notation about jointing, and there are lines right through the whole wing centerline, as if all the parts on one side are separate from those on the other wing.
I built one of the Jensen kits in 1968, had a ball flying it for a summer, but sold the airframe when I went to college. I still have the Lee-Veco .61 that powered it. I framed up another one for my father a couple years later, and he still has it. In more recent times I've bought two of the Jensen kits on eBay for my "retirement stash"; one is of noticeably lesser quality than the other: wood more "punky" and holes not cut so crisply. I believe I've heard tell that there was fall-off in art when Jim Jensen sold the business. But the "good" one is just like I remember the other kits I built.
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RE: Phil Krafts Original Ugly Stick - 
