'Sonic cruiser' claims
"The plush superjet is expected to knock up to 75 minutes off journey times between London and New York"
Can somebody help a poor non-tekkie understand how ?
Mach 1 = 658kts = 758mph (SA value)
LHR-JFK = 3451 miles
3451 at M0.95 = 4.79hrs = 4:47
3451 at M0.82 = 5.55hrs = 5:33
max saving = 0:46, and that's assuming M0.95 sustained for the entire block (not true) and flying a true GC (also not).
Is my math faulty ? Where's the 75 minutes ?
Genuine questions.