Today's Message Index:
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1. 03:45 AM - Re: Steel LG Lug Thickness (NikkoBelik)
2. 09:51 AM - Model-A starting problem (Jim Markle)
3. 08:38 PM - impulse mags (Oscar Zuniga)
4. 10:50 PM - Re: impulse mags (Clif Dawson)
Message 1
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| Subject: | Re: Steel LG Lug Thickness |
I never does that , will try too ))
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=365951#365951
Message 2
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| Subject: | Model-A starting problem |
Not sure if the issue has been resolved or not but....I had some problems starting
my engine (with a Wico top mounted mag) until I realized....I had it installed
180 degrees off. Lifted it out of the distributor hole, moved the shaft
around 180 degrees and it started right off....
Maybe your Vertex is the same....
Just a thought....
jm
> > The magneto Im utilizing is a Vertex mag that slips into the distributor hole
and it does not have an impulse coupler. There isnt enough room between the
firewall and engine to mount an aircraft mag so the plans solution is out. I
wonder if a stock automobile (Model-A) ignition system (battery, coil, condenser
and such) might give a better slow speed spark at least to get it running long
enough to loosen the tight engine so I could go back to the magneto.
> >
> > Any ideas, schemes or shots in the dark will be entertained. The only reward
will be a yet another YouTube video of a Model-A Pietenpol running.
> >
> > Bill
> >
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> > Read this topic online here:
> >
> > http://forums.matronics.com/viewtopic.php?p=365846#365846
> >
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> http://www.matronics.com/contribution
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Message 3
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I flew 41CC behind the A65 with two different mags (left and right
mags were different). Neither had impulse couplers and the older
one was a Scintilla "lunchbox", probably as old as the engine.
Still threw a great spark.
The A75 on the airplane now has matched, brand-new Slicks and
they both have impulse couplers.
Honestly, I don't notice any difference in ease (or difficulty) of
starting, probably because the compression is so low, the prop is
so long, and I try to keep everything in a good state of tune. I
can't comment on starting a Ford without impulse coupling, but my
experience with my Continentals has been fine with or without.
That plus the key to hand-propping these engines is finding the
right starting routine and following it exactly, every time, and
including whatever types of sprinkling pixie dust in the air or
swinging a dead chicken make it work for you. There is also an
importance to what you do when you shut the engine down, too. If
you shut off the fuel valve as you taxi up to your hangar and then
let the engine sputter and die as it runs out of fuel before you
kill the mags, it will start differently than if you leave fuel on
and shut it off with the mag switch, leaving fuel in the
carb bowl. It will also start differently if after you turn off
the mag switch and as the engine is spinning down you roll the
throttle forward (open) instead of leaving it at the idle stop.
I do not have a fuel primer; I pull it through a couple of blades
with the throttle back at the stop so it will pull fuel through
the idle circuit (Stromberg carb). It will usually start on the
first or second blade after I go through the proper motions.
Sprinkling the pixie dust works for me ;o)
Oscar Zuniga
Air Camper NX41CC "Scout"
Flying Squirrel N2069Z "Rocket"
Medford, OR
website at http://www.flysquirrel.net
Message 4
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| Subject: | Re: impulse mags |
I remember reading somewhere that two impulse
mags was a bad idea. I can't remember exactly
why but I think it had something to do with some
form of engine damage on startup.
I thought it was one of the Skyranch articles I've
got but it's not there.
Both O-290's I've got have one impulse, on the
left. Also the parts book and repair manual say
the same.
Clif
> The A75 on the airplane now has matched, brand-new Slicks and they both
> have impulse couplers.
> Oscar Zuniga
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