Mooney successfully belly's in

Peter Duniho wrote:

"G.R. Patterson III" wrote in message
...
If the engine won't stop with the mixture cut off, it won't stop with
the
mags grounded.

Not necessarily true.

What makes you say that? What motivating force are the magnetos providing
that keep the engine windmilling with just the mixture cut off, and which is
absent when you ground the mags?

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.

"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

On Wed, 02 Jun 2004 00:17:09 -0400, Jack wrote:



Andrew Sarangan wrote:

Dan Truesdell wrote in news:40BCCA76.8090409
@ceaPLsofAtwNarEe.cSom:



All correct. One thing you could have done was just switch off the magnetos
rather than the mixture control. This will shut down the engine faster, and

Depending on the engine that can still leave fuel going to the
cylinders.

might cause the prop to stop too when the mags are grounded. Since you won't
be restarting the engine anytime soon, there is no reason to not stop the
engine with the magnetos.

When I pull the mixture, it's like a switch. No slowing, it just
quits.

Actually that is a good time to reach down and turn off the gas.

Roger Halstead (K8RI & ARRL life member)
(N833R, S# CD-2 Worlds oldest Debonair)
www.rogerhalstead.com

Roger Halstead wrote:

On Wed, 02 Jun 2004 00:17:09 -0400, Jack wrote:



Andrew Sarangan wrote:

Dan Truesdell wrote in news:40BCCA76.8090409
@ceaPLsofAtwNarEe.cSom:



All correct. One thing you could have done was just switch off the magnetos
rather than the mixture control. This will shut down the engine faster, and

Depending on the engine that can still leave fuel going to the
cylinders.

Right. That's why the normal shutdown procedure is to use the mixture. An
airplane engine continues to move fuel into the cylinders after it is shutdown
without starving it of gas, in no small part due to the big prop helping to spin
it around for a bit.



might cause the prop to stop too when the mags are grounded. Since you won't
be restarting the engine anytime soon, there is no reason to not stop the
engine with the magnetos.

When I pull the mixture, it's like a switch. No slowing, it just
quits.

Actually that is a good time to reach down and turn off the gas.

Agreed.