Re: Boeing 720B

Date:         11 Feb 98 04:24:14 
From: (WSherr6080)
Organization: AOL
References:   1 2 3 4
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The Boeing 720B is 8 feet shorter than the 707 and therefore more
susceptible to a weather induced 'pitch-up' from a strong updraft, due
to the shorter moment arm.

e.g., The Northwest Airlines Boeing 720B fatal accident near Miami, Fl.
on February 12, 1963  the pilots' reacted to a weather induced
'pitch-up' by trimming both the horizontal stabilizer and the elevators
full nose down, along with a strong forward pitch control input. The
aircraft was upset into a vertical dive.  The crew had about 35 seconds
to recover from 19,000 feet.  The aircraft came apart in the air.