"Jack" wrote in message
...
No motivating force, however the mag switch in most planes works by
grounding
(short circuiting) the magnetos, not opening a circuit. A grounded
magneto has
a much greater load than a magneto happily humming around producing a
spark.

Are you seriously trying to claim that the additional load will make the
difference between the windmilling engine stopping or not? (Even assuming
your claim of increased load due to grounding is valid...seems to me, the
load is caused by the generation of electricity, which happens either way,
to the same degree).

Pete