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Thread OP
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55" Spitfire - or when does a flat airfoil stop flying
Had great sucess with a 45" flat airfoil Spit which was scale up from Tony N. plans in RCM&E. Decided to go to 55" WS..really lots of wing area with an AXI 2820/10 on 10/3000nimh pack. AUW 3#13oz.
 Flies like a champ almost a trainer at slow speed ..climbs at 75 degrees on initial takeoff. No snap tendencies ...just mushes forwarded as throttle is cut back and full up. You just got to loved the looks of a Spitfire. Big size easy on my eyes. I looking to do a F-20 TigerShark using this wing and motor. Can't fine any decent drawings ...does anyone have a drawing or plan available? |
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Hey Ralph,
Nice Spitfire there. Here's the tigershark the webpage where i got it is this, you'll find lots more there... http://members.fortunecity.com/inedesca/ [img]www.fortunecity.com/marina/manatee/272/tigershark.html[/img] crap, the image wont show up for some reason, just go to the page, and look under tigershark, its not listed as F20. the tigershark will look better with that flat wing than the spit since its a jet. You did such a nice job on the spit's fuse, might as well take more time to do a scale wing, i bet it would look sweet
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Last edited by Mig17; May 11, 2003 at 03:42 PM.
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Thread OP
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Yea you are right you can't get the right effect of the w-f faring as you do with a full wing. But I hate building wings. Thanks for the F-20 lead.
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Thread OP
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Kelvin , yor Kyshio conversion is awesome. How much bigger? I am thing 68-70" ws.
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Thick enough to be strong is thick enough... I've done a lot with flat plate, particularly in c/l, and learned a lot. If you are building a wing that big, using light 3/8" and a big sanding block gives you a workable wing with a rudimentary airfoil; is that the best of both worlds? I've built c/l using 1/2" sheet, really light, and reinforced the l/e with 1/8 dowel, nearly indestructible, and easily repaired.
True flat plate (1/16" to 1/8) with rounded l/e & t/e stalls much sooner than the same wing with any form of airfoil, but this isn't always bad, depending on what kind of model it is. With 1/2A c/l, I built up to 24" span and never ran into stall problems, and have seen lots of slopers with flat plate. If you hate wingtips or wing construction, the very best compromise is Jedelsky. It "flies" much better, and is nearly as fast to build... |
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Thanks TL.
I am looking at VERY fast, VERY thin wing sections, (4%) on a Slope Soarer, which is why I am asking the questions. I envisage a sheet of 3/8" soft balsa shaped using "foam cutting" techniques, but with sandpaper glued to a long straight stick instead of a hot wire, and a laminar flow wing section defined by metal templates at root and tip. Do you think thats feasable??? Cheers. Patrick.  
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Yes VINNY. I have re-thought that one. I printed out the P-51 root section for a 1/12 scale F-104, and even with an extended wing it is going to have to be sanded from 1/2" stock with a 4% TC ratio. That section has it's maximum thickness at 50% chord, so the LE is VERY thin.
Back to the drawing board. Cheers. Patrick.
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