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Old 12-24-2014, 05:17 AM
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Hudsonduster Hudsonduster is offline
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Join Date: Aug 2011
Location: Brooklyn, New York
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Mike, I just stumbled across this thread. I've got a bit of free flight experience myself, & if you still need beta builders I'd like to have a look at what you're doing here. I noticed Robert's comment about the rleative wing & stab incidence, and suggest that for any of these little gliders we need a three degree stab tilt to give us lateral stability. Swept wing planes need less or maybe no dihedral. An 8" w/s A-7 I did a while back took about 3/8" per tip, which was hardly visible, and a 20" w/s M-4 Bison had none.

Trouble with swept planforms is, they're TOO stable and don't want to transition like a straight wing glider. I'd launch the Bison level, it went level. I launched it at an angle and it'd go up 'til it lost momentum, stall, and come straight down. The A-7 was much better, getting about 60% flights off the catapult, and the rest it didn't transition but stalled & spiraled in, not quite a flat spin.

I'd love to take a whack at what you've got, if you still need. PM me please -
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