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                           TeamGrumman-List Digest Archive
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                     Total Messages Posted Thu 03/18/04: 2
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Today's Message Index:
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     1. 04:54 PM - Re: TeamGrumman-List Digest: 8 Msgs - 03/15/04  (Tiger67B)
     2. 08:21 PM - Re: CHT PROBES  (FLYaDIVE@aol.com)
 
 
 
________________________________  Message 1  _____________________________________


Time: 04:54:47 PM PST US
From: Tiger67B <jnpsavage@cox.net>
Subject: TeamGrumman-List: Re: TeamGrumman-List Digest: 8 Msgs - 03/15/04

--> TeamGrumman-List message posted by: Tiger67B <jnpsavage@cox.net>

On some installations they will supply you with a thermocouple and 3 
bayonets for picking up  CHTS's.... and they warn you that
numbers can be very different.... when I put in my JPI, I made a point 
of getting all the same (bayonets) temp pickups, with no
thermocouples...it came with at least one..

Jan Savage
Tiger 67B


>________________________________  Message 1  _____________________________________
>
>
>Time: 06:36:20 AM PST US
>From: "flyv35b" <flyv35b@ashcreekwireless.com>
>Subject: Re: TeamGrumman-List: Baffle adjustments
>
>--> TeamGrumman-List message posted by: "flyv35b" <flyv35b@ashcreekwireless.com>
>
>I'm sure Gary will have something to say about this, but 130+F variation
>between the front and rear cylinders is HUGH.  I've never seen a plane with
>anywhere near that much variation.
>
>I'd take a close look at the rear baffles and the parts that wrap down under
>the cylinder barrel and head fins.  The length of the head baffle is to long
>many times after someone has replaced it and it can restrict air flow.  The
>head baffle should terminate at about the same location (clock position) as
>the barrel baffle.  Some go so far you can even install a CHT probe.
>
>Of course there are several other areas that could be contributing to your
>high CHTs.  Maybe something is wrong with the forward cylinder baffling and
>a lot of air is being "dumped" up at the front and thereby lowering the
>pressure and flow across the rear cylinders.  Best get the problem resolved
>before the ambient temp gets warmer.
>
>Cliff  A&P/IA
>  
>






________________________________  Message 2  _____________________________________


Time: 08:21:27 PM PST US
From: FLYaDIVE@aol.com
Subject: Re: TeamGrumman-List:CHT PROBES

--> TeamGrumman-List message posted by: FLYaDIVE@aol.com

In a message dated 3/18/04 7:56:02 PM Eastern Standard Time, 
jnpsavage@cox.net writes:

> --> TeamGrumman-List message posted by: Tiger67B <jnpsavage@cox.net>
>  
>  On some installations they will supply you with a thermocouple and 3 
>  bayonets for picking up  CHTS's.... and they warn you that
>  numbers can be very different.... when I put in my JPI, I made a point 
>  of getting all the same (bayonets) temp pickups, with no
>  thermocouples...it came with at least one..
>  
>  Jan Savage
>  Tiger 67B
================
Jan:

Could you explain further?  What do you mean by "I made a point of getting 
all the same (bayonets) temp pickups, with no thermocouples...it came with at 
least one.."

Bayonet is the type of mount.  Example: Bayonet and Ring/Gasket.  Bayonet is 
a misnomer it really is a threaded mount that screws into the cylinder head, 
The Ring is a ring that fits under the spark plug. Which does not read CHT's as

accurate as a bayonet due to its location.
The both are thermocouples.  It is called a thermocouple because of the 
dissimilar metal junction that produces a voltage in correspondence to a 
temperature.

Barry
"Chop'd Liver"