Date: 27 Aug 99 16:25:24 From: JF Mezei <firstname.lastname@example.org> Followups: 1 2 3 4 5
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A recent post mentioned the R&D mega expenditures required to produce the engine for the next 777 which is a big reason only one manufacturer will build one. I am starting to wonder if the extra cost of pushing the "state of the art" limits to get the required performance on a twin is really worth all the effort ? Are we not getting to a point where conventional jet engines are reaching the top of the bell curve and any improvements will cost more and more ? On the other hand, by using 4 engines (or even 3), it allows you to use much more conventional technology which is not only cheaper for R&D but has greater market and hence more competition. Also, in the theroretical A3XX plane, what sort of power is expected out of each of the 4 engines ? Would they be using 777-class engines (90k and above) or 747 class engines (about 60k pounds, right ?) ? Also, is there a significant difference in weight for 4 medium vs 2 huge engines ?