1.0 link Rainbow Dash Network http://rainbowdash.net/ Macpony55 (macpony55) http://rainbowdash.net/macpony55 http://rainbowdash.net/notice/915726 @<span class="vcard"><a href="http://rainbowdash.net/user/5101" class="url" title="Neil Hodges"><span class="fn nickname">takeshitakenji</span></a></span> Do you know the general shape of a gyrocopter's mane rotor? Could you keep one edge flat if the angle of attack was high enough or would both sides have to have some degree of curve to them?