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Eliaciam,
I know it's good to be as accurate as possible, but, is it worth
the effort? You have to estimate anyways for the deviation unless
you're right on the adjusted heading. One of the long time pilots I
know said he's never heard of anybody getting lost due to deviation.
So, real life, it doesn't sound worth it to me.
-----Original Message-----
From: Jason J Ellingson [mailto:[EMAIL PROTECTED]
Sent: Wednesday, December 28, 2005 6:31 PM
To: [email protected]
Subject: RE: [COUPERS-TECH] Deviation chart - engine on or off?
----[Please read http://ercoupers.com/disclaimer.htm before following
any advice in this forum.]----
<humor mode = "ON">
Take the prop off. Then you can leave it running while using the tow
bar to move it around.
<humor mode = "OFF">
On a serious note... I wonder how many airports repaint their compass
rose to keep with magnetic drift? A local airport here has one, but it
hasn't been repainted for a long time... Yet the runways have been
renumbered due to magnetic drift.
------------------------------------------------------------
Jason J Ellingson
NC2273H
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Sent: Wednesday, December 28, 2005 5:17 PM
To: [email protected]
Subject: [COUPERS-TECH] Deviation chart - engine on or off?
----[Please read http://ercoupers.com/disclaimer.htm before following
any advice in this forum.]----
Okay, on to esoteric technical problems...
I found an airport with a compass rose and proceeded to align my
airplane over the rose, to get data to make a compass deviation card.
Found it hard to assure good alignment with the rose, with the plane's
engine on and myself inside the plane.
It would be more precise to have the plane off and to position it over
the compass rose by handling it from the outside. I could have the
radios on while doing this, however, I think that I would be missing
significant mangnetic fields from all those moving metallic parts in the
motor, the firing magnetos and spark plugs, and the turning generator,
which's not that far from the compass.
IMHO you need the engine on in order to take every magnetic field into
account while gathering data for your compass deviation card.
Am I right?
Of course, I could position the plane while turned off, then start it
and take the reading, turn it off, reposition it, take another reading,
and go on...
However, I don't think turning the plane's engine on and off 12 times in
a short span of time is healthy for the engine, and worth it.
So I either have the plane off and miss all those magnetic fields, or
have it on and miss accuracy in positioning it over the compass rose.
So which one is it? How is it done in real life??
Eliacim Cortes
N87071
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