Re: Cruising speeds - 727, 737, 767, 747

Date:         10 Jun 97 00:35:01 
From:         Ron Adams <ronadams@randomc.com>
Organization: Random Access Inc. +1 (800) 910-1190
References:   1 2 3
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> >Tom Atkinson <tom@tyco.net.au> writes:
> >>Please could somebody enlighten me as to the crusing speeds of these
> >>aircraft:
>
> 727 (200) 515 kt (953 km/h)
> 737 -300 429 kt (794 km/h) 737-400 439 kt (813 km/h)
> 767 460 kt (850 km/h)
> 747 (200, 300 or 400) 490 kt (939 km/h)

Those are calibrated true airspeeds. We usually use Mach numbers:

727  .84
737  .74
767  .80
747  .82

These are approximate and vary according to wind and aircraft gross
weight. i.e., higher headwinds and gross weight required higher cruise
mach.

(Mach is equal to the percentage of the speed of sound)