The design airspeeds for the KR-2 are: Va = 123 mph design maneuvering speed Vc = 171 mph design cruising speed Vd = 242 mph design diving speed
The new ASTM standard F2245 "Standard Specification for Design and Performance of a Light Sport Airplane" requires that Vh <= Vne <= 0.9Vdf Vh = maximum speed in level flight with maximum continuous power (corrected for sea level standard conditions) Vdf <= Vd , Vdf = demonstrated diving speed also Vne >= 1.1 Vc ( min Vne = 188 mph for the KR-2) if Vd = Vdf then max Vne for the KR-2 = 218 mph To quote from a Marcy Analytics report for the KR2S: "Again using FAR 23, Appendix A, the calculated minimum values of Vc andVd are 140 and 198 mph, respectively. Inasmuch as the KR2S is expected to be capable of 200 mph maximum level flight speed, we have selected Vc = 180 mph and Vd = 220 mph as design values, so that Vne = .9 Vd = 200 mph at 1050 lb gross weight. These selected design values exceed teh minimums specificed in FAR 23, Appendix A." ----- Original Message ----- From: "Mark Langford" <n5...@hiwaay.net> > Orma wrote: > > >Of interest is the Stall speed of 42 MPH and the Top Speed of 210, for the > Turbo KR-2. > > A "top speed" of 210 mph???? So much for the mythical 200 mph Vne! I've > always wondered where the 200 mph number came from (although I have my idea > of exactly which cavity), but now we have printed evidence that at some > point 210 mph was considered acceptable. And it only took 10 years for this > to rise to the surface. See > http://home.hiwaay.net/~langford/210mph_Vne.jpg for the proof. And I've > just got to say that somebody needs to go back to drafting school on this > side view. >
