u/c switch.

[Gramin@aol.com]

Come to think of it, this also gives a painless way of activating an
hourmeter.  Misses out your taxying time though, but better than hanging it
on the bus and logging all your engine-off electrics testing as engine hours
 .  True hours would only come by switching it in  from detected  rev.
counter output , though counting the pulses  themselves is a better guide to
engine wear.

Graham C.
.