erkki67
Well-Known Member
Koen, young Aviators will admire your website for years to come, it’s a reference of its own!
Oh I absolutely will be, just trying to find a decent profile. Squared off end is just where I want it to end.That looks GREAT... but please DEFINITELY consider curving the bottom of the nose upward, the shape of a ski or sled runner. I don't care if it looks cool or not (but it will). It will make a huge difference in the survivability / injury level of a hard landing, crash, off-airport landing. Chuck Slusarczyk figured this out 40 years ago with the the CGS Hawk, and I promise you lives were saved.
Nothing to do with drag... It's all weight with a little budget override thrown in. This morning's iteration it was 5.45kg just for 7075 tubes as struts (just tube no ends no fittings etc) - 4.2kg to omit the struts. That's wherein the fun lies - 45kg total is hard.'Festus I'm guessing there's likely more than enough drag on a basic glider like this to make drag reduction (from a cantilever wing) almost irrelevant. The struts are an off the shelf item, and will contribute greatly to easily mounting the fuselage under the wing. In fact, with struts, you can have only one central main spar/fuselage attach pin (and one central rear spar attach pin). Unless heavy, highly engineered fittings and structures are developed, the strut braced version will stand up to more bashing and crashing than a cantilever glider. Seems like an easy decision for the specific use and "clientele" you're aiming for.
Hey at least nobody is bringing up the raid area 51 "writer"Following this with interest, it reminds me of Mitjas thread of some years ago for an UL sailplane
As far as reducing frontal area drag the pilot could be more reclined like the Archaeoptryx or the Millenium gliders:
I totally agree ; but 5-Lb, of 50-K carbon tow, @ $125 , is not really...
If you want true 3 axis controls to train with and don't want a flying wing you need a very spindly airframe, wire braced and you need to use as many tension solutions to long strains as possible. See Buckmeinster Fuller for bizarro tension designs.
Carbon fiber is your friend but for a minimum weight but not your friend for minimum cost. Foam is your friend for minimum cost and minimum weight so somewhere between using those two is where the perfect design is.
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YES -- and i am one of them !!Whatever you do, just please don't let nest of dragons disappeara few of us reference it fairly regularly.
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This Thread , ain't about USA part 103 , (it;s about Canadian rules ,While flying wires makes it easy. It does pigeon hole the design...
Yes its starting as a 45kg primary glider.
With 24kg extra bringing it up to US part 103 glider rules. Fully enclosed cockpit is an option.
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Yet there exist others that pretty much hit the mark (aerianne swift). No struts or wires I can spot.This Thread , ain't about USA part 103 , (it;s about Canadian rules ,
and they want 99Lb) ; and you ain't gonna do that without wire/cord
braced wings and fuse braced parts (.) If you really think you can ; then
Bring-It !!
Yes -- i'm being kinda, direct here ; but if you can, then i'm gonna
have the best rigid-wing hang glider, in the world , with the info you
provide !
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