Supersonic turbofan airplane 7.7 years ago

Forgive me if I'm incorrect

Supersonic turbofan airplane 7.7 years ago

Mach 1 = 761 mph (speed of sound)
Mach 1.5 = 1,112.6 mph (1.5x the speed of sound)
Mach 2 = 1,483.5 mph (2x the speed of sound)

my firs creation yay 7.7 years ago

It's actually not bad at all after a couple test flights @tommid686

Helicopter (fixed) 7.7 years ago

WTF you sabotaged my helicopter so it would overspeed and blow. Up on takeoff