Re: Delta Flt 1288

From:         Steve Lacker <>
Organization: applied research laboratories
Date:         07 Sep 96 17:09:07 
References:   1 2 3 4 5 6
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>> The MD11 tail engine is slightly different in performance than the wings.
>> For example, the inlet air has to flow through a much longer path, and has
>> to undergo a rather severe acceleration-deceleration before entering the
>> fan.
>I know it's worse than on the DC-10-10, because they retained the same
>the banjo frames and thus diameter for the main part of the duct,
>Do you know how much of a performance hit the #2 on the -10-10 took,
>if any?

What about the center engine on an L-1011 or a 727, which in addition to having
a longer inlet path has an "S" duct (two turns together with the longer path)?
Any numbers as to the thrust reduction? What about life cycle of the engine- ie
operating temperatures, loadings, etc. as compared to the outboards?

Steve Lacker	/	Applied Research Laboratories, The University of Texas
512-835-3286	/	PO Box 8029, Austin TX 78713-8029