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Reply-To: "David Carter" <dcarter@datarecall.net>
From: "David Carter" <dcarter@datarecall.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-539457@logan.com>
Subject: Spark Plug cleaners (was Re: [FlyRotary] Re: Bernie Kerr had fire in the hole!
Date: Fri, 26 Nov 2004 22:44:16 -0600
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Ken,

I didn't see any responses to your observation about plug cleaners.

I used to use plug cleaners all the time in 1954 Ford 6 (low 7.x to 1
compression ratio) and on my VW.  They didn't seem to do as much good on
higher compression 1956 Chev'y power pack engine (8.5? to 1 "high"
compression) - plugs had to be good - cleaning and re-using didn't seem to
work well.

Have I heard that a "cleaned used plug" is not as effective as a "new plug"
in the rotary engine after flooding?  If there is such anecdotal info, then
I wonder if the "hard to start unless new plugs" is due more to loss of
compression due to loss of oil film and resulting need for "max good spark"?
I wonder if squirting some extra oil in the plug holes for each rotor face
wouldn't help it start better, maybe with "cleaned plugs"?  Leon Prommet
mentioned a long time ago that an ideal engine setup would have a little
tank of some concoction of oil (he mentioned brake fluid??) that would be
allowed to drip into the intake just before shutdown to "fog" the engine
really good (coat parts with a robust oil film) before shutdown.

Just wonder if "cleaned plugs" have been given a "bum rap".

David

----- Original Message ----- 
From: <kenpowell@comcast.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Friday, November 19, 2004 8:13 PM
Subject: [FlyRotary] Re: Bernie Kerr had fire in the hole!


> Congrads Bernie!!!   I can't wait to see and hear the new RV-9a.
> Also, a 'plugs cleaner' is a neccessary accessory for 2-stroke guys and
apparently rotary guys as well.  You will save a bundle on plugs if you
beadblast them lightly (you can do this 2 - 5 times with no apparrent lose
of performance) rather than replacing them everytime you wet foul them.
>
> Ken Powell
>
> -------------- Original message -------------- 
>
> >
> > Finally had the 13B running with a lot of help from "THE" rotary guru
himself,
> > Tracy Crook. Tracy flew down yesterday in the Otter on his first real
cross
> > country (1.5 hours). I still have some problems to sort out but at least
we had
> > it running after a lot of diagnostic work and chasing phantom problems.
It was a
> > very educational day for me, but am still a neophyte at the rotary game.
> >
> > The engine was severely flooding itself and Tracy convinced me that once
the
> > plugs are wet, you are only kidding yourself if you continue to crank
until you
> > remove the plugs and clean them. I have been trying to crank with some
suspect
> > plugs that I had thought were new. They came in the engine, but Tracy
said they
> > have run before somewhere. We finally resolved that the two things
causing the
> > extreme flooding were that the fuel pressure really was what the EC2
monitor was
> > reporting (64 psia) and that somehow when I checked the impedance on my
> > injectors that I thought they were the saturated type and they are
really the
> > peak type that require the resistors. Tracy flew the otter home this
morning
> > from TCAP and has some resistors coming priority mail which I should get
Monday.
> > Bruce Turrentine suggest that I just buy a new requlator from
Advance/Discount
> > auto. Will pick it up tomorrow.
> >
> > Even with these two problems, Tracy was able to get it running and had
it
> > purring pretty good on the B controller by turning the mixture control
full lean
> > and setting the internal trim full lean. When he flipped it to A channel
, the
> > plugs fouled before he could get it leaned. We could not get a restart
because
> > of the flooding.
> >
> > My wife commented on how much better the Otter sounds with the new
gearbox and
> > engine. Hope she thinks ours sounds as good when it gets all sorted out
here.
> >
> > Should be cranking again on Monday pm. Stay tuned.
> >
> > Bernie Kerr, itching to get flying!
> >
> > >> Homepage: http://www.flyrotary.com/
> > >> Archive: http://lancaironline.net/lists/flyrotary/List.html