Thanks to all that have suggested Clark-Y. I should have elaborated in my original post. I'd like to stay away from flat bottom airfoils. I need to fly this in heavy wind. That and I need to somewhat match the shape on the fuse mount.
At 02:42 PM 10/16/2002 -0400, Ben Diss wrote: >I'm building a wing for my glider tug. It's an L-19 Birddog. Before >anyone asks who may know this plane, no I didn't wreck it, I just want to >built another one with a few mods incorporated. I've come up with a >design for a foam core wing, but I'm having a bit of trouble with the >airfoil selection. Since this list has such an abundance of airfoil >experts, I thought I'd ask here. The current plane was built from Vailly >plans. As best that I can tell, the airfoil is a NACA 18013. I have no >idea why Roy would have used this airfoil and it's been so long he can't >remember. Can anyone suggest a 13% thick airfoil to use? I was thinking >about a NACA 1213, but I have no idea how it would fly. I would hope that >the airfoil would generate high lift, low drag at lower airspeeds and >create high drag at higher airspeeds. Obviously, I want a good climbing >airplane, but once off tow I want to be able to point it straight down and >not have it pick up a lot of speed. Also, this plane has functional 45 >degree "barn door" flaps. The wing is two panels, root chord is 16.5", >tapering to 12" at tip. Span (excluding fuse area) is 90". > >-Ben > >RCSE-List facilities provided by Model Airplane News. Send "subscribe" >and "unsubscribe" requests to [EMAIL PROTECTED] Please note >that subscribe and unsubscribe messages must be sent in text only format >with MIME turned off. RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off.
