Today's Message Index:
----------------------
1. 06:34 AM - Re: impulse mags (Ben Charvet)
2. 08:06 AM - Re: New Model A/Pietenpol pix (tools)
3. 08:27 AM - Re: impulse mags (BRETT PHILLIPS)
4. 08:39 AM - Re: impulse mags (899PM)
5. 10:11 AM - Re: New Model A/Pietenpol pix (Bill Church)
6. 01:03 PM - Fuel Tank and Engine (Michael Perez)
7. 01:32 PM - Re: Fuel Tank and Engine (Jack Phillips)
8. 01:50 PM - Re: Model-A starting problem (BYD)
9. 04:05 PM - Re: Model-A starting problem (Jerry Dotson)
10. 06:12 PM - Re: Fuel Tank and Engine (Michael Perez)
Message 1
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Subject: | Re: impulse mags |
My experience is very similar to Oscar's. My old Baby Ace had the twin
Slicks, and was easy to start. Always used both mags, both impulse. My
Piet has one impulse mag (Eisemann) and one non-impulse (Bendix). It
will definitely kick back if you dont give it a real spirited pull. I
usually start it on the Eisemann mag only. I don't have a primer
either, and know about how many blades to pull it through to prime it.
Usually I can hear the intake start to 'sound' wet. I also turn my fuel
off as I taxi in. Pushing the throttle forward as you kill the mags
keeps from loading up the engine with the equivalent of about 8 blades
of prime. After sitting for an hour or so at a pancake breakfast and
additional 2 blades of prime will usually start on the first blade. I'd
really like to upgrade to slicks, but as Oscar also said, the mags I
have are putting out great spark.
Ben Charvet
Mims, Fl
On 2/9/2012 11:37 PM, Oscar Zuniga wrote:
> --> Pietenpol-List message posted by: Oscar Zuniga<taildrags@hotmail.com>
>
>
> 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
>
>
--
Ben Charvet, PharmD
Staff Pharmacist
Parrish Medical center
Message 2
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Subject: | Re: New Model A/Pietenpol pix |
Thinkin' 'bout puttin' the Continental in the Ford? Think it'll cool alright?
Seriously, need a cool oversized warbird style towbar to use your new accessory
to move the Piet into and out of the hangar! Ok, maybe that's not so serious
either...
My dad is finishing up a Model A restoration, would be cool to get a pic like that.
Tools
dna
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http://forums.matronics.com/viewtopic.php?p=366031#366031
Message 3
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Subject: | Re: impulse mags |
My experience with a non-impulse equipped Model A is similar to Ben's. As
long as you snap it through like you mean it the engine will start fine,
even when timed at 30 deg. BTDC with a 6:1 head. With a long prop, it
helps to keep your hands a little closer to the center than you ordinarily
might. This makes it pull a little harder, but increases rpm for the same
hand speed.
Brett Phillips
NX311GP
Strasburg, VA
Message 4
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Subject: | Re: impulse mags |
One important difference to remember in this whole discussion is that the head
mounted mag is turning at cam speed whereas the crank mounted mag will be much
easier to coax a good spark out of.
--------
PAPA MIKE
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Message 5
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Subject: | Re: New Model A/Pietenpol pix |
Tool,
After reading your post, I was wondering what "dna" represented at the end of your
message. Then I thought that maybe it stood for "do not archive". If that's
the case, your abbreviation isn't going to do the job. The Matronics server
only recognizes the exact phrase (no abbreviations, or fancy-schmancy rewording
will work). If, on the other hand, it's just the short form for Deoxyribonucleic
acid, I see why you would want to use the short form... but I have NO idea
why you would want to sign off with that.
Just letting you know before Larry (Top Curmudgeon) gets on your case.
Bill C.
do not archive
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Message 6
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Subject: | Fuel Tank and Engine |
Attached are two pictures of my fuel tank in work. The tank is now finished
and on it's way to Greg K., (noted in last news letter) for welding and pr
essure testing.
-
I may also have an engine in hand by the end of the weekend! I'll report ba
ck on that if it pans out.
Michael Perez
Karetaker Aero
www.karetakeraero.com
Message 7
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Subject: | Fuel Tank and Engine |
Looks good. How much will it hold?
Jack Phillips
NX899JP
Smith Mountain Lake, Virginia
_____
From: owner-pietenpol-list-server@matronics.com
[mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of Michael
Perez
Sent: Friday, February 10, 2012 4:01 PM
Subject: Pietenpol-List: Fuel Tank and Engine
Attached are two pictures of my fuel tank in work. The tank is now finished
and on it's way to Greg K., (noted in last news letter) for welding and
pressure testing.
I may also have an engine in hand by the end of the weekend! I'll report
back on that if it pans out.
Michael Perez
Karetaker Aero
www.karetakeraero.com
Message 8
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Subject: | Re: Model-A starting problem |
UPDATE: First, Id like to thank my fellow lovers of the blue for sharing their
experiences related to my current struggle. Some I have experienced before posting
like using the spark-plug at the front of the plane (rear of the engine)
as #1 the first time I was setting up the ignition to discovering plug wires
3 and 4 swapped while checking the plugs to see if they were wet (I blame that
goofy firing order). I dont believe to be 180-degrees off since the rotor is
pointing at the #1 contact inside the cap when the engine is at top dead center.
To be clear I use the following procedure to set the timing, which I have
used on regular aircraft engines and have reviewed with an IA that I trust:
With the #1 plug removed (usually all of them and yes, #1 is the rear one on a
Piet) I move the propeller with my thumb on the #1 spark-plug hole until I feel
the compression poofing on my thumb. Then with a popsicle stick (the piston
isnt directly under the spark-plug hole), I rock the propeller back and forth
until I can feel that the piston is all the way up and between the connecting
rod rocking on the crank I declare this position top dead center (TDC). Next,
I turn the blade backwards watching a protractor with a pendulum pointing to
a scale of degrees until it is indicating the amount of advance I want. At
this point, I connect a buzz-box to the magneto and rotate the base until the
light and buzzer just come on where I set the locking screw to hold the base at
that position.
I have come to learn that 30-degrees is the maximum advance to be shooting for
and because my Vertex magneto has 12-degrees advance built in (between 700 and
1000 engine RPMs) the maximum I should be setting my static advance is 18-degrees.
I have received suggestions from that range clear down to 0-degrees to
see if I can at least get a pop. I also was looking at dyno reports from Synders
website and another source and noticed they listed 0-degrees static and 28-degrees
maximum advance as the normal setup for running their tests.
I have been to the airport and set the static advance at 5-degrees following the
procedure above but the weather here is rainy, and my trusted assistant is off
goofing around in the snow up in the mountains. I dont wish to prop it alone
on a wet ramp so I wait for the situation to improve.
Stand by, film at 11.
Bill
Read this topic online here:
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Message 9
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Subject: | Re: Model-A starting problem |
Bill I have been following your thread and now I can't help but add my 2 cents.
I learned a trick from an old junk yard man that sold used engines. Put about 2
tablespoons of oil in each cylinder. On the Piet I would block the tail up level.
Then pull it through several revolutions.Let the tail down and crank it. The oil
seals the cylinder and make it easier to turn. It will blow blue smoke for
a minute or two.
do not archive
--------
Jerry Dotson
59 Daniel Johnson Rd
Baker, FL 32531
Started building NX510JD July, 2009
now covering and painting
21" wheels
Lycoming O-235 C2C
Jay Anderson CloudCars prop 76 X 44
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Message 10
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Subject: | Fuel Tank and Engine |
I believe it to be close in size to Mike C's. His holds around 16-17 gal.(?
)- Once I get it back I'll fill it up and get a better idea.
Michael Perez
Karetaker Aero
www.karetakeraero.com
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