While the jet is impressive, a motorless glider holds the speed record @ 799fps or 545mph. Winds were 53 - 80 mph.660 fps -----
I use a Hitec Aurora 9x radio with Optima 9 rx. The servos are a mix of MKS HV747 and MKS HV6130.
For the distance travelled per lap you can figure ~3.1sec at 800ft/s ~2500ft so about 800ft diameter. This is larger than theoretically optimal but was alot more flyable given the turbulence...
I was involved with the design and built the plane but 'scratch built' would be misleading since alot of people have contributed on the project. Most notably Dirk Plug, Thomas Pils, and Stutgart University. Thanks guys!
Sorry ,I didn't have a stopwatch when I did the above figuring. Lap times are shorter than I thought...
https://www.rcgroups.com/forums/sho...cer-Lisenby-Kinetic-Transonic-DP-545MPH/page5
That would be so hard to program to be autonomous