Hacker News new | ask | show | jobs
by otto 5596 days ago
Without altitude and temperature a Mach number is rather useless. (Depending on altitude the temperature and pressure changes which has an effect on the speed of sound.)

Also was this just the Mach experienced at the leading edge?

1 comments

>Without altitude and temperature a Mach number is rather useless

Actually, no, it's the most important number. See http://womanpilot.com/?p=61 (near the end) for why.