Re: 2 vs 4 engines: R&D costs too much ?

Date:         16 Sep 99 16:42:54 
From:         "Anthony Rassias" <anthrass@ozemail.com.au>
Organization: OzEmail Ltd, Australia
References:   1 2
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Don't forget that a two engined airliner must have more total thrust than a
four engined airliner of the same weight to cope with an engine failure. A
two engined airliner hence has 50% of thrust available available where
obviously the figure is 75% for a four engined airliner.(more engine thrust
= more engine weight)
Also the two engined airliner must satisfy ETOPS requirements (which add
further to weight)