Today's Message Index:
----------------------
1. 07:11 AM - Re: RPM vs MP (Dave Grosvenor - DreamWings)
2. 08:46 AM - 901 Engine Starter Engaged with Spark Plug Wire Disconnected (WAYNE BEATTIE)
3. 09:02 AM - Re: 901 Engine Starter Engaged with Spark Plug Wire Disconnected (ivor.phillips)
4. 03:49 PM - Re: rpm (JetPilot)
5. 03:56 PM - Re: Re: rpm (Gilles Thesee)
6. 03:56 PM - Re: Re: rpm (Duncan McFadyean)
7. 05:04 PM - Re: rpm (David X)
Message 1
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--> RotaxEngines-List message posted by: "Dave Grosvenor - DreamWings" <dave@dreamwings.co.za>
Thanks to all for the input, that is the sort of info I was looking for.
Dave
Message 2
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| Subject: | 901 Engine Starter Engaged with Spark Plug Wire Disconnected |
By accident I engaged the starter of my 912 UL for several seconds with the spark
plug wires disconnected from the plugs. Now I fear I may have damaged the ignition
circuitry. Has anyone done this and what was the result?
The L.E.A.F. Catalogue shows a piece of equipment that it says allows you to turn
the engine over with the plug wires disconnected from the plugs. It does not
show up on the website and when I call they have no listing on their computer.
Has anyone heard of this being used?
Wayne
Message 3
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| Subject: | Re: 901 Engine Starter Engaged with Spark Plug Wire |
Disconnected
Assuming you have a key switch and not toggles, then there is a slim chance that
the Ignition modules have been damaged, They are quite robust so you may be
OK!
connect every thing back up and test,
Ivor Phillips
----- Original Message -----
From: WAYNE BEATTIE
To: RotaxEngines-List Digest Server
Sent: Sunday, February 26, 2006 4:45 PM
Subject: RotaxEngines-List: 901 Engine Starter Engaged with Spark Plug Wire Disconnected
By accident I engaged the starter of my 912 UL for several seconds with the spark
plug wires disconnected from the plugs. Now I fear I may have damaged the
ignition circuitry. Has anyone done this and what was the result?
The L.E.A.F. Catalogue shows a piece of equipment that it says allows you to
turn the engine over with the plug wires disconnected from the plugs. It does
not show up on the website and when I call they have no listing on their computer.
Has anyone heard of this being used?
Wayne
Message 4
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--> RotaxEngines-List message posted by: "JetPilot" <orcabonita@hotmail.com>
So does that mean that using a lower RPM like 4800 on a 912-S for cruise is bad
?????
--------
NO FEAR - If you have no fear you did not go as fast as you could have !!!
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=15202#15202
Message 5
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--> RotaxEngines-List message posted by: Gilles Thesee <Gilles.Thesee@ac-grenoble.fr>
JetPilot a crit :
>--> RotaxEngines-List message posted by: "JetPilot" <orcabonita@hotmail.com>
>
>So does that mean that using a lower RPM like 4800 on a 912-S for cruise is bad
?????
>
>
>
Hi JetPilot,
Better follow the engine manufacturer recommendations.
You may wish to download the Operator's Manual. All the tables are in it.
As a rule, to insure the best specific consumption, you run at the
highest manifold pressure, and the lowest RPM compatible with engine
reliability. 4800 RPM seems quite right for circa 65-75% power.
Regards,
Gilles Thesee
Grenoble, France
http://contrails.free.fr
Message 6
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--> RotaxEngines-List message posted by: "Duncan McFadyean" <ami@mcfadyean.freeserve.co.uk>
Why would reducing both mechanical stress and thermal stress be bad?
Duncan Mcf.
----- Original Message -----
From: "JetPilot" <orcabonita@hotmail.com>
Sent: Sunday, February 26, 2006 11:48 PM
Subject: RotaxEngines-List: Re: rpm
> --> RotaxEngines-List message posted by: "JetPilot"
> <orcabonita@hotmail.com>
>
> So does that mean that using a lower RPM like 4800 on a 912-S for cruise
> is bad ?????
>
> --------
> NO FEAR - If you have no fear you did not go as fast as you
> could have !!!
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=15202#15202
>
>
>
Message 7
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--> RotaxEngines-List message posted by: "David X" <dxj@comcast.net>
The only "bad" RPM settings that are evident from available documentation/bulletins
are exceeding 5500 for more than 5 minutes, or running below 2000 RPM for
extended periods; which may cause gear box "chatter".
Max cruise power will give you most speed, 65% power will give you better economy
and range, 75% power will give you the happy medium between speed and economy.
I really don't know if running an engine mostly at 65% power vs. 75% will make
it last longer or not. Theoretically, perhaps. I think the greater factors to
long life have to do with running MOGAS instead of AVGAS, changing the oil every
50 hours instead of every 100, keeping the carbs tuned, keeping the fliters
and plugs clean etc.
Maybe someone who has worn out a few Rotax 912 might have more authoritative opinion.
--------
Zodiac 601 XL - CZAW Built - Rotax 912S
DO NOT ARCHIVE
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=15213#15213
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