Junkers Trimotor Airliner

Date:         02 Sep 98 01:08:26 
From:         Andrew Goldfinger <Andy.Goldfinger@jhuapl.edu>
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Recently, at IAD I saw a display of a Junkers Trimotor Airliner (IIRC it
was the Ju52, or some similar designation).  It had one rotary engine on
the nose, and one on each wing.  The wing mounted engines appeared to be
canted slightly outwards.  Does anyone know why this was done?  I
speculate that it may have been to make the effective thrust vectors of
the engines go through the center of mass, and therefore improve engine
out performance.  If so, why is this not done with modern airplanes?