Re: A second 757 crash -- off the Dominican coast

From:         rboggs@pacifier.com (Richard Boggs)
Organization: Pacifier, public access Internet site. 360-693-0325
Date:         15 Mar 96 01:05:23 
References:   1 2 3 4
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In article <airliners.1996.351@ohare.Chicago.COM>,
Peter Hollingsworth <gt1208a@prism.gatech.edu> wrote:

>Why would it suffer from detonation, Kersosene is closer to desil fuel
>then ligh petroleum distilates. Using Jet fuel in an gasolene powered
>pistron engine is akin to using desil fuel in the same engine. In fact the
>U.S. military is standardizing all of the desil and turbine powred
>vehicles to run on Kerosene.

Jet fuels, stove-oil, and kerosene cause detonation in recips (except
diesels) because the burning characteristics (in a reciprocating engine)
are nearly opposite that of gasoline fuels. They work well in diesel engines
while gasoline does not.

Aside from detonation damage in a gasoline fueled recip, a "thin" mixture
of jet fuel and gasoline causes high exhaust temps which lead to stretched
valves and loss of power. There have been many cases of aircraft flying
for extended periods before engine failure. At least one well documented
accident caused by mis-fueling occurred when the crew of a freight
hauling DC-3 attempted several times to take off. Each attempt was
aborted due to power loss. The final attempt ended in flames at the end
of the runway. Examination of the engines showed valve stretching due to
overheating, and detonation damage.

Rick

Rick Boggs                            :  When men come to like a sea-life,
rboggs@pacifier.com                   :  They are not fit to live on land.
Merchant Marine and Maritime Pages    :
http://www.pacifier.com/~rboggs       :                    Samuel Johnson