I am probably one of the "freshest" pilots on this net, but maybe therefore
I remember so well how my CFI reacted when he saw me once push the Cessna
172 into its parking space by the propeller. Did I get an earfull - - !
Re. making sure that the mags are off, how many things have happened because
"I was sure that --". As we say here in Texas: Handle any gun as a loaded
gun!
Svein Johnsen - #A225
-----Original Message-----
From: owner-europa@post.aviators.net
Subject: Re: Pulling on the Prop
Anyone who has ever hand swung a prop will know how easy it can be to get an
engine to fire up by easing it past TDC on any cylinder - especially true
when you dont expect it to fire but usually an absolute b***tard when you
want it to (sods law).
Theoretically it could happen with a 912 but due to the gearing less likely.
Methinks this probably applies to older engines with direct drive props.
The moral of the story is to make sure the mags are definitely off.
CP
----- Original Message -----
From: "Miles McCallum" <milesm@avnet.co.uk>
Subject: Re: Pulling on the Prop
The main reason is that if the ignition is on (as it can be if you have an
open circuit P lead) and you move the prop, the engine can start - OK,
almost impossible with a 912, but on the Auster, you don't have to lean on
it to get it running - 50% of the time just gently pulling it over
compression is enough. I've even seen an engine start by moving the prop
enough to kick off the impulse coupling - about 1/2" at the tip. Impressive,
and it scared the "$%
&*@ out of the engineer....
M
> I was sitting on the loo this morning, reading my favorite aviation
> magazine when I read a warning about "never maneuvering an airplane around
> on the ground by pulling or pushing on the prop".
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