Convert Mach 20 to Feet per Minute
Convert Mach 20 (Ma20) to Feet per Minute (ft/min) instantly and accurately.
Conversion Formula
ft/min = Ma20 × 1339724.409
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 Feet per Minute
A foot per minute (ft/min) = 5.08 × 10⁻³ m/s - the US standard for elevator speed, HVAC duct velocity, and conveyor speed. Residential lifts: 100-200 ft/min; commercial 200-400 ft/min; skyscraper express lifts 1,000-3,000 ft/min (Burj Khalifa 2,953 ft/min). HVAC low-velocity ductwork: 500-1,000 ft/min; medium-velocity 1,000-2,200 ft/min. Paper machine Fourdrinier wires: 200-6,000 ft/min. 1 ft/min = 0.00508 m/s.
Quick Reference Table
| Mach 20 (Ma20) | Feet per Minute (ft/min) |
|---|---|
| 1 Ma20 | 1339720 ft/min |
| 2 Ma20 | 2679450 ft/min |
| 5 Ma20 | 6698620 ft/min |
| 10 Ma20 | 13397200 ft/min |
| 25 Ma20 | 33493100 ft/min |
| 50 Ma20 | 66986200 ft/min |
| 100 Ma20 | 133972000 ft/min |