There is a theoretical polar provided by the factory which is in the manual. The glider has not been directly tested yet. However, for what it is worth, the observations provided by the factory polar translate very well into real flight. For instance, the polar indicates an almost non-existent drag bucket and that it has a wide range of thermalling speeds as a result. This works very well. Overall, compared to the ASW27 polar, it gains in the lower speed and the high speed ends. In the middle, it is slightly better. I have access to all technical data or could facilitate a discussion with the engineers at Windward Performance for you guys to get everything you need. Another interesting example is that Greg Cole went through his computer models and told us to thermal it with 17 degrees of flaps rather than 15. Bill Thar and I thought it was kind of insane to thermal with so much flap and then I tried it and wow! Those two degrees really grooved it in well into the turn.
Also as another observation, its huge advantage not only comes in straight line performance, but also in handling. It is as docile if not more than the LS4, even loaded. I've had the wing drop exactly once and that was due to a very sharp gust in a thermal and the recovery was very easy and quick. It is astonishing on such a laminar flow wing that the flow can be broken in such a predictable manner such to create such docile characteristics. Windward did this by having five airfoils throughout the wing.
One interesting thing about the glider is that it carries only 26 gallons of water, half of the 27. This is because the wings are so small that they simply did not have enough room to load it up more. In my case this gets the wing-loading to almost 11 lbs/square foot. However, if you load the glider up with more fixed ballast, it can go up to 12 lbs/square foot. I wonder how you guys would account for that.
Last edited by TheSoarer151
on Tue May 06, 2014 4:52 pm, edited 2 times in total.