Re: A340 speed

From:         kls@ohare.Chicago.COM (Karl Swartz)
Organization: Chicago Software Works, Menlo Park, California
Date:         12 Jul 96 11:49:52 
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>Also, isn't the "old design" 737 as slow or slower than a 757 or 767?

Yes.  This has been one reason why the 737 has lost sales to the A320
and its derivatives.  The new wing on the 737-600/700/800 will give it
higher, more competitive cruise speed.

>And isn't the 727 faster than the 757 as well?

Right again.  Here's a summary of what AW&ST lists as the best cruise
speed for various Boeing models:

   707		M 0.80-.83
   727		M 0.80-.84
   737-100/200	M 0.73-.78
   737-3/4/500	M 0.745
   737-600	M 0.782		(shortest)
   737-700	M 0.781		(same size as -300)
   737-800	M 0.785		(longest)
   747-100/200	M 0.84
   747-300	M 0.85
   747-400	M 0.86
   757		M 0.80
   767		M 0.80
   777		M 0.84

They don't list a "best cruise speed" for Airbus, just "max. speed"
which may be higher than best cruise:

   A300B2	M 0.86
   A300		M 0.82		(all others, including current -600)
   A310		M 0.84
   A320/19/21	M 0.82
   A330/340	M 0.86

Other manufacturers:

   DC-9-10	M 0.75-.80
   DC-9		M 0.76-.80	(all others, including MD-8x and MD-90)
   DC-10	M 0.82		(including MD-11)
   L-1011	M 0.83

--
Karl Swartz	|Home	kls@chicago.com
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