Today's Message Index:
----------------------
1. 12:25 AM - Re: Rotax 914 question? (Gilles Thesee)
2. 05:25 AM - Re: Rotax 914 question? (Jim Thursby)
3. 11:25 AM - Re: Rotax 914 question? (Jim Brown)
4. 02:34 PM - Wednesday DOTH (Bryan Allsop)
5. 06:08 PM - Gas Struts (N55XS)
Message 1
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| Subject: | Re: Rotax 914 question? |
--> Europa-List message posted by: Gilles Thesee <Gilles.Thesee@ac-grenoble.fr>
Hi Jim,
Understand your speed point, though running at 80% instead of 75% gives
you only a 2% speed gain. That's hardly an extra 2 knots.
Now, if speed is the main goal and longevity not a problem, why reduce
boost in descent ? As for the carbon issue, no Rotax 9xx I know of have
suffered of significant deposits.
Now saving fuel is indeed an honourable goal ;-)
Regards,
Gilles Thesee
Grenoble, France
>--> Europa-List message posted by: "Jim Thursby" <jthursby@tampabay.rr.com>
>
>Speed. And the 912/914 series longevity is based on 5,000 plus cruise rpm's
>It does NOTHING but save a little fuel running them lower. And carbon them
>up quicker.
>
>
>
>--> Europa-List message posted by: Gilles Thesee
>--> <Gilles.Thesee@ac-grenoble.fr>
>
>
>Those numbers correspond to rather high settings. While the engine may run
>at 100 % continuous, what is the point for a cruise above 75 % ?
>
>
>
Message 2
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| Subject: | Rotax 914 question? |
--> Europa-List message posted by: "Jim Thursby" <jthursby@tampabay.rr.com>
I won't argue with you. You run yours at "economy cruise" rpm's and see
what happens. I never did and never will.
Jim T
-----Original Message-----
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] On Behalf Of Gilles Thesee
Subject: Re: Europa-List: Rotax 914 question?
--> Europa-List message posted by: Gilles Thesee
--> <Gilles.Thesee@ac-grenoble.fr>
Hi Jim,
Understand your speed point, though running at 80% instead of 75% gives you
only a 2% speed gain. That's hardly an extra 2 knots.
Now, if speed is the main goal and longevity not a problem, why reduce boost
in descent ? As for the carbon issue, no Rotax 9xx I know of have suffered
of significant deposits.
Now saving fuel is indeed an honourable goal ;-)
Regards,
Gilles Thesee
Grenoble, France
>--> Europa-List message posted by: "Jim Thursby"
>--> <jthursby@tampabay.rr.com>
>
>Speed. And the 912/914 series longevity is based on 5,000 plus cruise
>rpm's It does NOTHING but save a little fuel running them lower. And
>carbon them up quicker.
>
>
>
>--> Europa-List message posted by: Gilles Thesee
>--> <Gilles.Thesee@ac-grenoble.fr>
>
>
>Those numbers correspond to rather high settings. While the engine may
>run at 100 % continuous, what is the point for a cruise above 75 % ?
>
>
>
Message 3
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| Subject: | Re: Rotax 914 question? |
--> Europa-List message posted by: Jim Brown <acrojim@cfl.rr.com>
Gilles;
I will correct my original E-Mail to show 33" MP rather than the 34" MP
as shown.
For me its the "sweet spot" on the engine. It has less vibration, its much
smoother running at this RPM as opposed to lower RPM settings. The
difference in
the fuel burn at 5300 RPM as opposed to 5000 RPM is nil.
This engine has served me well, for better than 600 + hours.
Jim Brown
N398JB
Gilles Thesee wrote:
> --> Europa-List message posted by: Gilles Thesee <Gilles.Thesee@ac-grenoble.fr>
>
> Jim Brown a crit :
>
> >--> Europa-List message posted by: Jim Brown <acrojim@cfl.rr.com>
> >
> >Alen
> >
> >Allen in my normal cruise I run the 914 at 5300 RPM and 34" MP
> >
> Jim and all,
>
> Those numbers correspond to rather high settings. While the engine may
> run at 100 % continuous, what is the point for a cruise above 75 % ?
>
> Here are excerpts from the 914 operator's manual :
>
> /100 % power is 5500 RPM / 35"
> 75 % power is 5000 RPM / 31"
> 65 % power is 4800 RPM / 29"/
>
> /10.3.8) Engine shut-off
>
> Normally the cooling down of the engine during descending and taxiing
> will be sufficient to allow the engine to be shut off as soon as the
> aircraft is stopped.
>
> At increased operating temperatures continue to idle until temperature
> will drop to "normal operation level", see Chapter 10.1).
>
> Allow a cooling run of at least 1 min. as an engine shu-off at high
> temperature is especially harmful for the turbo charger. Carburizing oil
> might block the oil supply and firing in the muffler can occur.
> /
> FWIW,
> Regards,
>
> Gilles Thesee
> Grenoble, France/
> /
>
Message 4
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--> Europa-List message posted by: "Bryan Allsop" <bryan@blackballclub.com>
Is anyone up for a Doth this week?
Bryan
Message 5
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--> Europa-List message posted by: N55XS <topglock@cox.net>
Does anyone have a US source for the gas struts used on our Europas?
--
Jeff - N55XS
40 hours are done and phase II is in effect. The missus got her first ride, yeterday...
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