Re: Q:747-400F vs. 747-200

Date:         18 Aug 97 02:22:14 
From:         Marc Schaeffer <marcmsc@geocities.com>
Organization: None
References:   1 2 3 4 5 6 7 8
View raw article
  or MIME structure

Karl Swartz wrote:

> With the 777-200(IGW), the only difference between various MGTOW
> optiosn is paperwork and dollars.

Don't forget the engines (dollars) which change with the MTOW.
B777A Trent 875/877, PW4074/4077 and GE90-75/77B.
B777B Trent 884/890, PW4084/4090 and GE90-85/90B.

The additional thrust is needed to get the additional fuel to takeoff
speed, or if you keep the smaller engines on a higher MTOW you have a
longer takeoff distance.

I was told that the engines can be upgraded by reprogramming the FADEC.
According to the same source the higher TOW is achieved by reprogramming
the FMS.

...........................................................
Marc Schaeffer, Luxembourg // mailto:marcmsc@geocities.com
---->>>>> Check out my aircraft homepage <<<<<----
WWW  http://www.geocities.com/CapeCanaveral/Lab/8803/