[time-nuts] tube GPS receivers

[Brian Alsop]

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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