Re: Perhaps a silly question (DC-9 barrel roll)

Date:         04 Jun 97 13:04:00 
From:         pierce@pat.mdc.com (Cole Pierce)
Organization: McDonnell Douglas, Houston Division
References:   1
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In article <airliners.1997.1141@ohare.Chicago.COM>, hasmith@acsu.buffalo.edu writes:
|> 	I was wondering if anyone might be able to help me here.  On a
|> recent flight a friend and I were musing on whether a commercial jet (In
|> this case it was a DC9) could handle a barrel roll. Now I know there are
|> all sorts of factors to consider like at what speed, and perhaps how fast
|> the roll itself was executed, but I would appreciate any input anyone
|> might have.

Other than Tex Johnston's roll of the -707 in Seattle, I am not aware of
any other incidents of this type.  If they've been done, they've likely
been kept under wraps.  However, speaking as a retired USN fighter pilot
and current MD-80 pilot, I have little doubt that the DC-9 could pull it
off.

With sufficient entry airspeed, a modified barrel roll could be completed
without exceeding 1.5 to 2 g's on entry and exit.  The exit is critical,
as scooping out at the bottom might lead to exceeding the DC-9's 2.5g
limit.

I say 'modified barrel roll' because I don't think there would be a true
heading change of 90 deg over the top.  Not sure that Tex did a true barrel
roll, either, but rather something between a barrel roll and an aileron
roll.

gun one