Convert Mach 20 to Earth Escape Velocity
Convert Mach 20 (Ma20) to Earth Escape Velocity (v_esc) instantly and accurately.
Conversion Formula
v_esc = Ma20 × 0.6084212408
About Mach 20
Mach 20 ≈ 6,805.8 m/s (24,501 km/h) at ISA sea level - the peak heating regime of ballistic re-entry. Shock layer temperature exceeds 10,000 K; plasma sheath causes radio blackout. Space Shuttle decelerated through Mach 20 at ~75-80 km altitude; Apollo CM hit the atmosphere at ~Mach 36; ICBM warheads re-enter at Mach 18-24. DARPA HTV-2 reached Mach 20 in 2011. 1 Mach 20 = 6,805.8 m/s.
About Earth Escape Velocity
Earth's escape velocity = 11,186 m/s at the surface - v_esc = √(2GM/r). A spacecraft launched at this speed (any direction) escapes on a parabolic trajectory; less gives an elliptical orbit. Apollo's trans-lunar injection exceeded this to reach the Moon. Voyager, Pioneer, and New Horizons all exceeded 11.2 km/s at launch. Moon escape velocity 2.38 km/s; Mars 5.03 km/s; Jupiter 59.5 km/s. 1 Earth v_esc ≈ 11,186 m/s = 40,270 km/h.
Quick Reference Table
| Mach 20 (Ma20) | Earth Escape Velocity (v_esc) |
|---|---|
| 1 Ma20 | 0.608421 v_esc |
| 2 Ma20 | 1.21684 v_esc |
| 5 Ma20 | 3.04211 v_esc |
| 10 Ma20 | 6.08421 v_esc |
| 25 Ma20 | 15.2105 v_esc |
| 50 Ma20 | 30.4211 v_esc |
| 100 Ma20 | 60.8421 v_esc |