Okay, Need some input...

I need a airfoil that will give good snap and stall proprieties, plane weight 5kg max with a wing span of 2 meters and 975-1200 sq inch wing.

The wing will be plug in, foam with wood sheeting.

any ideas ?

scott anderson
Team Castle Creations
Team Tanicpacks.com

Define "good".

A friendly stall and sharp snap charactaristics are mutually exclusive. Sort of like "military intelligience" or "Jumbo Shrimp" or "Hi, I'm from the government and I'm here to help you"

There's no one perfect airfoil for any one plane. The move today seems to be towards thinner airfoils for their sharper stalling and good snap rolling and they depend on the large prop disc to maintain even speeds. Especially if you're going with electric propulsion as I suspect from the names in your sig line.

In any event a "good" pattern model airfoil is more about flying style and pleasing the judges. And the optimum selection has changed over the years as a result. You'd be better off asking this question in the pattern forum to get a few options.

Bruce,


Or as in my profession ( paramedic) this won't hurt a bit LOL..

Thanks for the info..

Scott

I am glad to see a thread on airfoils, I have been in this hobby for 60 years, starting with Baby ROG for you younger guys that was a rubber powered Rise off the Ground, I progressed through C/L freeeflight, single channel etc, my problem is this, I instruct and fly everything from 3 channel Senorita's up to my 103 inch C130 and lots in between, they all fly great , most of the trainers with a Clark Y my Herk uses NACA 23012, I have triied to undersatnd Reynolds numbers, Epler and many others but it seems that in modeling the foil is not that important as long as the wing loading is light and you got lots of power, for example, we had a guy flying his 33% Edge 3D tons of power, the airfoil is fully symetrical and VERY thisk, great show but then there was the guy with his 36 " foamy P51, a chunk of foam for a wing and he put on the same show CONFUSED LOL Mike