On 6/23/2013 14:40, Bob Camp wrote:
Hi
AC137 doesn't ring any bells. True tube core (no solid state at all) isn't something that
was dimensioned in K words. A couple hundred words was pretty big stuff. "Quite a
bit" of core done that way is a lot of tubes. As the number of tubes goes up, the
time to failure comes down….. hours … minutes … who knows.
Bob
Yeah, it gets to be like the cross country aircraft races in the 20's.
The mechanic had to fly with the pilot. (The MTBF of many of the engines
used was measured in hours.) If necessary he had to climb out on the
cowling while in flight to change plugs and fix whatever possible
without landing. What would OSHA say about that?
Needless to say future generations will probably find lots of aircraft
spark plug artifacts in their digs.
Brian/K3KO
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