Design > Stunt design
Vortex Generators on a Twister
Ken Culbertson:
Has anybody tried vortex generators on a Twister? It may be to light to have any affect and I can't find anything that helps in a search.
Ken
Tim Wescott:
There may be more direct ways to attain high performance.
AFAIK vortex generators only make sense when the wingloading is high. How heavy is your Twister? I'll admit that I never tried putting vortex generators on my 54 ounce Twister (see the graphical aid), but even so, I'm pretty sure that it wouldn't have overcome the airplane's inherent Twisterness.
Ken Culbertson:
--- Quote from: Tim Wescott on August 16, 2019, 06:07:54 PM ---There may be more direct ways to attain high performance.
AFAIK vortex generators only make sense when the wingloading is high. How heavy is your Twister? I'll admit that I never tried putting vortex generators on my 54 ounce Twister (see the graphical aid), but even so, I'm pretty sure that it wouldn't have overcome the airplane's inherent Twisterness.
--- End quote ---
48oz electric & Fancherized with 4" added to span so it has a pretty low loading. It has a nasty habit of turning early after a couple of corners slow it down. Other than that I would put it up against a PA ship in good air. Thought the generators might let me use a bit less elevator and stop some of it's Twisterness. They really helped my PA ship which wobbles in at 70 ounces but is massively over powered so it flies quite nice and is great aerobic exercise.
Ken
Brett Buck:
--- Quote from: Ken Culbertson on August 16, 2019, 06:02:31 PM ---Has anybody tried vortex generators on a Twister? It may be to light to have any affect and I can't find anything that helps in a search.
--- End quote ---
So far, I haven't seen anyone that found a case that worked worse with VGs than not, I don't see why the Twister would be any different. Given that the theory of operation is, at best, "vague", I would suggest just trying it and seeing what happens. You can always take them off again.
Brett
FLOYD CARTER:
I've discovered that with a top coat of 2-part automotive clear coat, almost nothing will stick to the stuff. So how does one attach VG's? (Not that I would want to try them, but just curious).
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