Been playing around with a F-106 wing design for a few weeks now. From prior experience with my MiG 15 I know that flat plate wings seem to bleed energy badly in turns and that for me the KFm4 aerofoil worked best........but when I built a 29” KFm4 for the F-106 it just looked odd. Sooooo - I decided to try my hand at designing my first FT style Delta. To be fair, Zephyr1 and Ben Harber’s MiG21/A-4 wings were definitely my inspiration here, so a big thank you to them both!
What I ended up with is this
Once the were joined together with 1/4” dihedral at the tips they formed a ridiculously strong wing that is very light. I designed in under-camber from the leading edge droops to the tips so I can test out slow speed and stall characteristics with and without the under-camber simply by adding a bottom plate with velcro. And also to help figure out how to do full scale droops with a flat bottom.
The original design was for a 29” F-106 powered by a 50mm 4S motor. Only problem is I can’t seem to crash my 50mm MiG no matter how hard I try😆. So I decided to slap a FMS 64MM 12 blade into a butcher block fuselage and make a flying testbed out of the wing.
Please don’t judge the fuselage too harshly, my original design for the 50mm fuselage is very involved in order to get that area ruled shape, but since none of my drawings allowed for the size of the 64mm fan (and I’d already built the wing) I decided to just slap together a fuselage and get the wing in the air to test it out. I borrowed heavily from Flite Test concepts and anyone who built Ben’s AMAZING A-4 will recognize his intake design (this is not what the 50mm version will use, but it’s simple, light and very easy to build), basically I want to figure out if my design would fly well (it’s my first attempt at a Delta), the optimum CG range, how much reflex is needed for reliable hand launch, whether or not a scale vertical stab will work well at low Rn on a Delta planform, how much control throw is required, can the LE droops be extended to a scale length without getting broken off on landing - also, do they alter the flight characteristics at this scale, and if at 30oz AUW will the 650W of power (325W/lb power loading) be sufficient - because the 50mm version will be about 6oz lighter and puts out 580W............blah blah, you get the picture - Basically will my wing fly?
If the weather cooperates I’ll attempt a maiden today🤞. Standby for a crash (I mean flight) report, complete with pictures of the carnage😂
What I ended up with is this
The original design was for a 29” F-106 powered by a 50mm 4S motor. Only problem is I can’t seem to crash my 50mm MiG no matter how hard I try😆. So I decided to slap a FMS 64MM 12 blade into a butcher block fuselage and make a flying testbed out of the wing.
If the weather cooperates I’ll attempt a maiden today🤞. Standby for a crash (I mean flight) report, complete with pictures of the carnage😂