Approaching Mach 1

• Moving at 700-780 m.p.h. at sea level
• Tail of aircraft worked very nicely, shortening by 50% around Mach 1

Wiktionary Word definitions in Wiktionary
a. 1 just below, or just above the speed of sound (0.8 < Ma < 1.2 approximately) 2 passing from subsonic to supersonic, or vice versa

Wikipedia Word definitions in Wikipedia
Transonic is the debut album by American jazz drummer Whit Dickey , which was recorded in 1997 and released on AUM Fidelity . For his first record as leader, Dickey went into the studio with long-time associate, saxophonist Rob Brown , and then relative ...

WordNet Word definitions in WordNet
adj. (of speed) having or caused by speed approximately equal to that of sound in air at sea level; "a sonic boom" [syn: sonic ] [ant: subsonic , supersonic ]