On the Aquila, I'm pretty sure they got rid of the curve on the front of the bottom surface (aka "Phillips entry") in addition to getting rid of the "undercamber". I.E. they made it completely flat bottomed.
Was the Sagitta 600 l.e. radius really increased? My old Sagitta and some others I flew had a very sharp stall, and I remember thinking the l.e. looked pretty sharp. The Oly 2 flies very nicely and stays up well, but isn't much fun if you need to go fast. At that point it starts to descend at an alarming rate. Almost doesn't need spoilers for getting out of a thermal, though they might be handy for landings. Chuck Anderson and Jerry Miller wrote: > > At 09:13 PM 12/4/2001 -0800, you wrote: > >Didn't the Oly II have an E-205 airfoil as did most of the earlier > >Airtronics sailplanes and gliders? Larry Jolly should know the answer to > >this puzzle. > > Jerry Miller > > No. I am not sure but I think the original Olympic used an undercambered > airfoil. The Oly II used a true flatbottomed airfoil similar to the > Drifter and Sailaire. The Aquilia used a modified E387 while the Sagitta > used a modified E205. The undercamber was removed from both while the > leading edge radius of the E205 was increased. I compared the modified > E205 and E387 airfoils to the true airfoils about 20 years ago when I was > first started developing my airfoil plotting program. Not sure exactly why > the modifications but I remember Lee mentioning that he liked to increase > the leading edge radius to improve the stall characteristics. snip > Chuck Anderson Bill Barnitz wrote: > > I got curious and went and pulled out my Oly II original box and had a > > look. The plans do not say what the airfoil is. The only I D of the > > airfoil is on the cover art where it says: Airfoil: Flat Bottom - 10% thick. > > I was hoping it would say E-205 or something like that. So how does that > > kind of a foil fly???? Any comments on that? Bill B. -- Lincoln Ross RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
