On Tue, 2011-02-22 at 09:22 +0000, Andrew Wood wrote:
> Thanks for the replies so far.
>=20
> Is it true that a generator becomes physically harder to turn the higher =
the current load?

Yes.

> Presumably in that case a petrol diesel generator must have some way of a=
utomatically detecting this and increasing the power to the engine?

Yes. Generators have a throttle govener that ensures the correct output
RPM, which translates to the correct output frequency.

You can see the effect whenever switching a heavy load on (or off), the
engine speed drops (or rises) and then settles back at the correct
value.

TTYL


--=20
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