Today's Message Index:
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1. 10:03 AM - Re: egt temp (Noel Loveys)
2. 11:40 AM - Re: Re: RotaxEngines-List Digest: 4 Msgs - 06/25/07 (Gilles Thesee)
Message 1
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100 % in agreement
Noel
> Time: 03:55:22 AM PST US
> From: Thom Riddle <thomriddle@roadrunner.com>
> Subject: Re: RotaxEngines-List: egt temp
>
>
> Noel,
>
> When you used the term "backfire" I mistakingly thought you were
> referring to the explosion in the exhaust system phenomenon, which is
> what many (maybe most) people erroneously call "backfiring" when in
> truth that is an "afterfire". Afterfiring being generally caused by
> unburned fuel (from overly rich condition) in the exhaust system
> hitting a hot spot and exploding. With your further explanation I now
> know you were speaking of firing back through the intake
> system, which
> indeed can be caused by lean condition among others. Thanks for the
> clarification.
>
> You are also correct when you state that when the fuel level in the
> float bowl is low that would cause a lean condition, whether it is
> caused by the fuel supply being exhausted or the float level
> is set too
> low.
>
> I'm well acquainted with the rich of peak and lean of peak situations
> and in general, especially with engines that are not fuel injected or
> in which instrumentation does not include EGT for every
> cylinder, your
> recommendation to run a bit rich of peak EGT is a good one.
> However, in
> a system with manual mixture control, as long as I'm running
> at normal
> cruise power or less, I generally lean very slowly until the
> slightest
> roughness begins to be noticed and then enrichen mixture until smooth
> again. As long as the fuel is of the proper octane and
> everything else
> is normal in the engine, this will yield best fuel economy without
> risking the engine in any way. Unfortunately, we don't have a manual
> mixture control on our 912UL.
>
> Thom in Buffalo
Message 2
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| Subject: | Re: RE: RotaxEngines-List Digest: 4 Msgs - 06/25/07 |
Noel Loveys a crit :
> P51s were built to be used in the European theatre with Rolls-Royce engines.
> That could be the reason for the Celsius gauges.
>
Noel,
P-51 crews were mainly from the the US, Britain and its "colonies", the
only nations in the world using Fahrenheit. After the war, they forgot
about their good dispositions...Funny.
Best regards,
--
Gilles
http://contrails.free.fr
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