FlyerTalk Forums - View Single Post - Speed question
Thread: Speed question
View Single Post
Old Feb 6, 2007 | 4:18 pm
  #10  
Ex Amex Card
 
Join Date: Nov 2002
Location: London
Programs: I've got three passports, A couple of visas, Don't even know my real name.
Posts: 909
I've seen 693 MPH (600 kts) on a Boeing 777 with a 130 MPH tail wind.

Quite a bit of turbulence though.

The cruise speed for the aircraft type varies but it's typically around 0.83-0.85 Mach for the larger ones. The speed of sound is about 660 MPH (at cruise height) so the cruise speed is about 660 x 0.85 = 560 MPH. You'd need around 140 MPH tail wind to crack 700 MPH.
Last edited by Ex Amex Card; Feb 6, 2007 at 4:25 pm Reason: Added calculations
Ex Amex Card is offline  
Reply