3 ms·
120 knots is normal cruise, 140 knots is fast cruise but that's at sea level. This drops off by 3 knots per 1,000' of density altitude. Airfield elevation at Tu
by tutmeister 5y ago
120 knots is normal cruise, 140 knots is fast cruise but that's at sea level. This drops off by 3 knots per 1,000' of density altitude. Airfield elevation at Tuscon is ~2400' and it was 58⁰F at 10 p.m. on Feb 9. Which puts density altitude at ground level around 2900', so the cruise speed drops around 9 knots, to 111 kias and 131 kias.
I agree this UAS would need to be IC-powered due to the range and altitude the UAS supposedly reached, but I don't think the speed was as fast as many folks have been thinking.