Re: 747-400 Initial Cruise

Date:         16 Jun 98 02:15:24 
From: (dzul)
Organization: Singapore Telecommunications Ltd
References:   1 2 3 4 5
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In message <airliners.1997.2703@ohare.Chicago.COM> - 22 Nov 97 20:41:23 (James Matthew Weber) writes:

:>Cruise on a 747-400 at these mach numbers carries a huge fuel burn
:>penalty. There is now ay the aircraft would make a Europe-Asia trip at
:>those speeds. Long Haul Cruise on a 747-400 is M.82, while M.86 may be
:>possible, I have never seen anyone do it.
:>  Have anyone out there seen it?

normally out of singapore to europe, (on the B744 with PW4056) at max
weight, initial flight level is FL280 for a couple of hours and then to
FL310. At about 4-5 hours, FL350 and then a few hours later FL390.

btw we always cruise between Mach 0.85 and Mach 0.86. basically the econ
speed is governed by the weight of the aircraft, the flight level and
the cost index (input into the FMS).