2 ms·
Mach 20 is so fast. It's around the Earth at the equator (ground level) in two hours.
by FredPret 4y ago
Mach 20 is so fast. It's around the Earth at the equator (ground level) in two hours.
- HPsquared 4y agoOrbital speeds within the atmosphere, basically. Edit: I suppose that means the vehicle wouldn't need any aerodynamic lift when going at full speed; indeed, to maintain altitude it'd need negative lift.
- SkyMarshal 4y agoBarely within the atmosphere, I assume. Mach 20 at commercial jet altitudes would probably melt the aircraft.
- Victerius 4y agoJust build your aircraft out of titanium. *cough*SR-71*cough*
- SkyMarshal 4y agoI said Mach 20, not Mach 3.
- FredPret 4y agoWonder if this would be much of an issue for a missile. It can melt away on the outside to a degree, as long as the payload gets there intact. And it can get anywhere on the planet in an hour, so perhaps a sacrificial shield would work.