Re: A 777 with four engines.

Date:         29 Jun 98 02:38:20 
From:         domk1031@cetus.zrz.TU-Berlin.DE (Burkhard Domke)
Organization: Technical University of Berlin, Germany
References:   1 2 3 4
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On 28 Jun 98 18:47:26 , Marc Schaeffer <marcmsc????@cmdnet.lu> wrote:

>H Andrew Chuang wrote:
>>
>>  IIRC, the new A340-500/600 will still have a nominal
>> cruise Mach number of 0.82, same as the original A340.
>
>Not correct, the A340NG will have a slightly higher Mach number of 0.845,
>this is a result of the higher wing sweepback.

...combined with reduced thickness/chord ratio (chordwise "insert").
But as wing loading has crept well into the 800s (kg/m², that is),
0,845 seems somehow ambitous. LRC/ECON speeds may differ.
How balanced a design can these -500/600 A340s be, anyway?

Burkhard