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Date: Sun, 16 Apr 2006 14:29:41 -0400
From: John Slade <sladerj@bellsouth.net>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: Typical EGT
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I'm measuring downstream of the turbo.
I guess I'll just set the alarm up to 1800 and stop worrying about it.
Thanks.
John

Tracy Crook wrote:
> Hells' bells John, 1650 on takeoff is stone cold.  I normally saw 1760 
> - 1800 on a NA 13B.  Turbos normally run higher (pre- turbo) than NA. 
>  
>  BTW, which side of the turbo are you measuring?  Temps are lower 
> down-stream.  Another observation - A turbo with LESS restriction will 
> give higher EGT readings down-stream of the turbine so this could be 
> normal.
>  
> Tracy
>
>     ----- Original Message -----
>     *From:* John Slade <mailto:sladerj@bellsouth.net>
>     *To:* Rotary motors in aircraft <mailto:flyrotary@lancaironline.net>
>     *Sent:* Saturday, April 15, 2006 8:33 PM
>     *Subject:* [FlyRotary] Typical EGT
>
>     Rotarians,
>     When I installed my T04 turbo I must have damaged the EGT probe. I
>     was
>     seeing 500F on take-off. Today I installed a new probe and it
>     looks like
>     the new turbo runs a lot hotter than the old one. While installing
>     the
>     new probe I noticed that the ceramic coating on the turbo had
>     turned to
>     dust.
>
>     On take-off today I saw 1730 and the EGT alarm went off. I backed off
>     the throttle and flew with it down around 1600, but that only gets me
>     around 4500 rpm and zero boost. Bring it up to 5000 rpm and I see
>     1650.
>     This is with the mixture a little higher than mid scale. Richen the
>     mixture a tad and I can reduce EGT by 30 F or so. If I bring the
>     rpm up
>     to 5300 the EGT is up to 1700 pretty quickly. Oil and coolant
>     temps are
>     fine at around 180 - 190. I put 3.3 hours on the plane today with no
>     other issues, but at 4500 rpm I don't get there very fast. :(
>
>     What do other rotary flyers consider max EGT, and what could be
>     causing
>     it to be so high (if this is really high)?
>     John
>     N96PM
>     60.5 Hrs.
>
>     --
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