Today's Message Index:
----------------------
1. 06:29 AM - Re: Re: Detonation (A. Dennis Savarese)
2. 07:37 AM - Re: Re: Detonation (Roger Kemp M.D.)
3. 08:01 AM - Re: Re: Detonation (T A LEWIS)
4. 08:50 AM - V530 Two Blades Propeller For Sale (cd001633)
5. 09:05 AM - Re: Re: Detonation (A. Dennis Savarese)
6. 09:41 AM - Re: YAK 50 facts (John Cox)
7. 11:07 AM - Re: Re: Detonation (Kregg Victory)
Message 1
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I believe severe detonation would cause damage to the piston as has been
seen in many internal combustion engines with aluminum pistons, which
the M14 has. The parts you mention, wouldn't there be evidence of
these parts in the combustion chamber upon inspection with a bore scope?
Dennis
On 6/12/2011 1:49 AM, Frank Stelwagon wrote:
> I have seen ground electrodes blown off the spark plugs from
> detonation but never hammered down. I have seen plugs hammered down
> from parts (screws etc.) in the cylinders. In a normally aspirated
> engine the parts can move from cylinder to cylinder, but I don't see
> how that would happen in a supercharged engine. Could be detonation
> but it would be a severe case.
> CJ6-A N23021
> *
>
>
> *
Message 2
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Frank,
I thought the same thing immediately after the event. I bore scoped the
cylinders looking for errant valve fragments, keepers, or any other metal
fragments of unknown etiology. Even put a flexible magnet in the cylinders.
Nothing was found. Inspected the piston heads. There was some pitting
similar to coarse 200 grit sandpaper. Pretty well scanned all of the piston
head as well as looked at the valve seats, the plugs in the cylinder and the
airstart valve. Nothing found in the cylinders and no holes in the piston.
Off to the airport to pull the intake tubes to look for possible holes in
them. Will recheck the collars again.
Doc
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Frank Stelwagon
Sent: Sunday, June 12, 2011 1:50 AM
Subject: Yak-List: Re: Detonation
I have seen ground electrodes blown off the spark plugs from detonation but
never hammered down. I have seen plugs hammered down from parts (screws
etc.) in the cylinders. In a normally aspirated engine the parts can move
from cylinder to cylinder, but I don't see how that would happen in a
supercharged engine. Could be detonation but it would be a severe case.
CJ6-A N23021
Message 3
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Are you sure you installed the correct heat range plugs ? This sounds an
=0Ainterference problem .=0ATerry=0A=0A=0A=0A=0A___________________________
_____=0AFrom: Roger Kemp M.D. <viperdoc@mindspring.com>=0ATo: yak-list@matr
onics.com=0ASent: Sun, June 12, 2011 10:34:08 AM=0ASubject: RE: Yak-List: R
e: Detonation=0A=0A=0AFrank,=0AI thought the same thing immediately after t
he event. I bore scoped the =0Acylinders looking for errant valve fragments
, keepers, or any other metal =0Afragments of unknown etiology. Even put a
flexible magnet in the cylinders. =0ANothing was found. Inspected the pisto
n heads. There was some pitting similar to =0Acoarse 200 grit sandpaper. Pr
etty well scanned all of the piston head as well as =0Alooked at the valve
seats, the plugs in the cylinder and the airstart valve. =0ANothing found i
n the cylinders and no holes in the piston.=0AOff to the airport to pull th
e intake tubes to look for possible holes in them. =0AWill recheck the coll
ars again. =0A=0ADoc=0A-=0AFrom:owner-yak-list-server@matronics.com =0A[m
ailto:owner-yak-list-server@matronics.com] On Behalf Of Frank Stelwagon=0AS
ent: Sunday, June 12, 2011 1:50 AM=0ATo: yak-list@matronics.com=0ASubject:
Yak-List: Re: Detonation=0A-=0AI have seen ground electrodes blown off th
e spark plugs from detonation but =0Anever hammered down.- I have seen pl
ugs hammered down from parts (screws etc.) =0Ain the cylinders.- In a nor
mally aspirated engine the parts can move from =0Acylinder to cylinder, but
I don't see how that would happen in a supercharged =0Aengine.- Could be
detonation but it would be a severe case.=0A-=0ACJ6-A- N23021-=0A
-=0A -=0Ahttp://www.matronics.com/Navigator?Yak-List=0Ahttp://forums.ma
=============== =0A
Message 4
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| Subject: | V530 Two Blades Propeller For Sale |
FYI,
I posted the propeller on e-bay with several expandable pics. I also
reduced the price... It's listed on Barnstormers web site as well.
This prop will make a great back up and a great insurance for zero down
time, just in case...
The e-bay listing can be found by searching "M14P propeller" or directly by
record number: 260799383966
Will consider a serious offer.
Sam Sax
305.215.5599 cell
Message 5
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The plugs are correct Terry. It's the same automotive plugs we've all
been using for years. 1/2" reach. Actually the same length as the
original Russian plugs.
Dennis
On 6/12/2011 9:59 AM, T A LEWIS wrote:
> Are you sure you installed the correct heat range plugs ? This sounds
> an interference problem .
> Terry
>
> ------------------------------------------------------------------------
> *From:* Roger Kemp M.D. <viperdoc@mindspring.com>
> *To:* yak-list@matronics.com
> *Sent:* Sun, June 12, 2011 10:34:08 AM
> *Subject:* RE: Yak-List: Re: Detonation
>
> Frank,
>
> I thought the same thing immediately after the event. I bore scoped
> the cylinders looking for errant valve fragments, keepers, or any
> other metal fragments of unknown etiology. Even put a flexible magnet
> in the cylinders. Nothing was found. Inspected the piston heads. There
> was some pitting similar to coarse 200 grit sandpaper. Pretty well
> scanned all of the piston head as well as looked at the valve seats,
> the plugs in the cylinder and the airstart valve. Nothing found in the
> cylinders and no holes in the piston.
>
> Off to the airport to pull the intake tubes to look for possible holes
> in them. Will recheck the collars again.
>
> Doc
>
> *From:*owner-yak-list-server@matronics.com
> [mailto:owner-yak-list-server@matronics.com] *On Behalf Of *Frank
> Stelwagon
> *Sent:* Sunday, June 12, 2011 1:50 AM
> *To:* yak-list@matronics.com
> *Subject:* Yak-List: Re: Detonation
>
> I have seen ground electrodes blown off the spark plugs from
> detonation but never hammered down. I have seen plugs hammered down
> from parts (screws etc.) in the cylinders. In a normally aspirated
> engine the parts can move from cylinder to cylinder, but I don't see
> how that would happen in a supercharged engine. Could be detonation
> but it would be a severe case.
>
> CJ6-A N23021
>
> * *
> * *
> **
> **
> **
> **
> **
> *http://www.matronics.com/Navigator?Yak-List*
> **
> **
> *http://forums.matronics.com*
> **
> **
> **
> **
> *http://www.matronics.com/contribution*
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> ist" rel=nofollow target=_blank>http://www.matronics.com/Navigator?Yak- -Matt Dralle,
> on" rel=nofollow target=_blank>http://www.matronics.com/contribution*
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Message 6
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Message 7
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Doc. When you get a chance call me @ 408.836.5122. I may be able to help.
Kregg Victory
Sent from my Samsung Epic 4G
"Roger Kemp M.D." <viperdoc@mindspring.com> wrote:
>Frank,
>
>I thought the same thing immediately after the event. I bore scoped the
>cylinders looking for errant valve fragments, keepers, or any other metal
>fragments of unknown etiology. Even put a flexible magnet in the cylinders.
>Nothing was found. Inspected the piston heads. There was some pitting
>similar to coarse 200 grit sandpaper. Pretty well scanned all of the piston
>head as well as looked at the valve seats, the plugs in the cylinder and the
>airstart valve. Nothing found in the cylinders and no holes in the piston.
>
>Off to the airport to pull the intake tubes to look for possible holes in
>them. Will recheck the collars again.
>
>Doc
>
>
>
>From: owner-yak-list-server@matronics.com
>[mailto:owner-yak-list-server@matronics.com] On Behalf Of Frank Stelwagon
>Sent: Sunday, June 12, 2011 1:50 AM
>To: yak-list@matronics.com
>Subject: Yak-List: Re: Detonation
>
>
>
>I have seen ground electrodes blown off the spark plugs from detonation but
>never hammered down. I have seen plugs hammered down from parts (screws
>etc.) in the cylinders. In a normally aspirated engine the parts can move
>from cylinder to cylinder, but I don't see how that would happen in a
>supercharged engine. Could be detonation but it would be a severe case.
>
>
>
>CJ6-A N23021
>
>
>
>
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