discspeed wrote:Flat wings are also more speed sensitive meaning they can be overstable, straight, or understable with just a little change in speed.
On this point I have to bring up the MD2 and JOKERi. Both have a flat wing (and a blunt nose) and the JOKERi is famous for it's very high HSS and wind resistance, and the ability to keep that HSS while losing LSS. Now, I didn't really think my MD2s could handle much wind (I was basing this assumption on my older, sharp nosed MD2s from the first run), but I still took my C-MD2s out to the field on a windy day (very gusty, wind speeds @ 30 mph gusts and 12 mph constant winds). They were totally unfazed by even the strongest headwinds. Even on throws where the wind speed changed dramatically two to three times during the flight (going from the 12 mph normal wind to the 30 mph gusts) they still held a straight and true line all the way. My C-MD2s are not those overstable ones, they fly very straight in calm conditions and hold anhyzers great. And I suspect that the only reason why my new blunt nosed P-MD2s and D-MD2s don't fare just as well in the wind (they do turn a bit when the wind kicks up) is the combination of bigger dome and slightly lower PLH.
Anyway, even the new P-Lines are way more wind resistant than the old P-Lines, and the flat wing shape and PLH is identical. The blunt nose must help, because clearly flat wings can fly consistently over a wide speed range, even in the wind.