![]() ![]() (my plans are to carbon-sheet it, add flaps instead of ailerons and electrify it. In either case, this airframe - the Bob Sealy Laser - is an uncommon airframe, but every reference I've seen speaks positively about it. These are both low-RE foils, with the S-3071 selected to be the more-slippery variant of that glider. As I write this, I'm looking at two sets of foam cores cut for S-3071 and S-7032 to be used in a 3m foamcore-balsa sheeted wing on a 25 year old design that lands at the edge of you're golden window. That being said, I have no direct recommendations among those sets, and few tend to perform in an optimum manner at the low Re RC gliders tend to float at.Ī step deeper, let's move to the sweet-spot of the age you're building around - just before composites came into their own. They are explicitly all over the map in regards to performance - the different digits describe parameters of the airfoil itself, with the 3 and 4 describing different geometry, and the 5 series describing lift characteristics. ![]() but there's some merit in an nice ol' scratch woody.įirst, I wouldn't be so hasty to turn your nose up at NACA's so quickly (of any series). That can be fun, and is a fairly common strategy for several decades, though most builders these days eschew pure balsa for composites if this is their goal. So 3m lead-sled (Glider optimized for energy retention in speed rather than floatyness to punch through turbulence and sink). ![]()
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