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Old September 9th 09, 12:35 PM posted to rec.aviation.piloting
Brian Whatcott
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Posts: 915
Default Declared first emergency last week

Morgans wrote:

"brian whatcott" wrote

There's one element that is very troubling: the cable break in the
middle. I am supposing that the bowden has triple internal helical
wires as low friction standoffs - and that repeated motion against a
wire cut the cable.

That shouldn't happen....


Unless the run is perfectly straight, any bend will flex the internal
cable each time it moves. Metal fatigue still happens, given enough time.


If a plane is flown twice a week for thirty years, there could be
30 X 52 X 2 X 5 cycles on the throttle - and that's a highball estimate.
16000 cycles should not fatigue a wire, should it?

Brian W