Today's Message Index:
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1. 07:50 AM - Fuel Pump (Neal George)
2. 12:20 PM - Re: Re: Thermocouples: grounded or ungrounded (Robert L. Nuckolls, III)
Message 1
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Mornin=99 James =93
When you have a minute to kill, pull the drawings for 653351-4 (or -4A1), p
lease.
I=99m looking for the travel requirement for the mixture lever.
Meaning, does it need 2=9D of throw to go from stop to stop?
The print may not detail that measurement =93 I can figure it from throw-an
gle and lever length if necessary
Neal George
George Aviation
850-218-2939
Message 2
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| Subject: | Re: Thermocouples: grounded or ungrounded |
>The most important temperature readings will be of the stator.
yeaaahhh . . . sort of. Temperature numbers of the stator
stack adjacent to mounting bolts will be greatly
influenced by heat transfer to the crankcase.
We know that the stator failures are generally limited
to one pole. How do the wires look on remaining poles?
To precipitate this 'isolated' failure suggests a thermal
runaway event where the resistance of copper rises with
temperature which in turn, increases energy dissipated in
the wires. I.e. a positive feedback for temperature
excursion.
To catch a pending failure suggest a need to monitor
each winding . . . unless field experience shows that
failures are concentrated.
In any case, other temperatures around the system's
components may be interesting data but I'm skeptical
as to their ability to flag impending failure any
one coil.
Bob . . .
Un impeachable logic: George Carlin asked, "If black boxes
survive crashes, why don't they make the whole airplane
out of that stuff?"
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