Today's Message Index:
----------------------
1. 12:17 AM - Re: 914 Fuel System (josok)
2. 01:10 AM - Re: 914 Fuel System (G-IANI)
3. 01:43 AM - AW: Re: 914 Fuel System (Ing. Gottfried Komaier)
4. 11:23 AM - Re: AW: Re: 914 Fuel System (danbish)
5. 12:05 PM - Re: Re: AW: Re: 914 Fuel System (Vaughn & Gaye Teegarden)
6. 05:48 PM - Re: Re: 914 Fuel System (Craig Ellison)
7. 05:54 PM - Re: Re: AW: Re: 914 Fuel System (Jim Brown)
8. 06:25 PM - Re: 914 Fuel System (danbish)
9. 09:00 PM - Re: Re: 914 Fuel System (Steve Hagar)
Message 1
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| Subject: | RE: 914 Fuel System |
--> Europa-List message posted by: "josok" <josok-e@ukolo.fi>
Hi Dan,
The difference is that in the tech talk, just as in the latest issue of the XS
914 engine manual the pumps are operating in serial. This seems to be a Rotax
requirement. I intend to follow that requirement, although at this time i can't
figure out where the advantage is. Anybody with more insight?
Kind Regards,
Jos Okhuijsen
----------------
Message 2
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--> Europa-List message posted by: "G-IANI" <g-iani@ntlworld.com>
The 914 fuel system shown in the Mod 33 documentation is the old parallel
pump system. This is no longer recommended by Rotax.
The present recommendation is for the serial layout shown in the Tech Talk
article in EF43.
Ian Rickard #505 G-IANI XS Trigear
Europa Club Mods Rep (Trigear)
e-mail mods@europaclub.org.uk
or direct g-iani@ntlworld.com
Message 3
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| Subject: | RE: 914 Fuel System |
--> Europa-List message posted by: "Ing. Gottfried Komaier" <gottfried.komaier@gmx.net>
Dan,
I know that the emotions about the electrical fuel pumps are great.
Parallel, or in series, this is the point where the opinions are divided. I
let the pumps work in series as ROTAX laid down in the latest Maintenance-
and Operators-Manual, as this version seems to me the only logical design
when flying at high altitudes. If you look at the different ROTAX manuals
(Operators-, Installation-, Maintenance-Manual) you will see in every book
another idea. (Installation-M, page 48 dated 10.5.96 the pumps are operating
in PARALLEL, acc. Maintenance-M, page 32 dated 1.2.97 and acc. Operators-M,
page 9-2 dated 1/98 in SERIES). The documentation of ROTAX is disastrous!
I'm suprised that the Authorities accept this different and not up-to-date
manuals.
Greetings,
Gottfried
-----Ursprngliche Nachricht-----
Von: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] Im Auftrag von josok
Gesendet: Dienstag, 21. Februar 2006 09:14
An: gottfried.komaier@gmx.net
Betreff: Europa-List: RE: 914 Fuel System
--> Europa-List message posted by: "josok" <josok-e@ukolo.fi>
Hi Dan,
The difference is that in the tech talk, just as in the latest issue of the
XS 914 engine manual the pumps are operating in serial. This seems to be a
Rotax requirement. I intend to follow that requirement, although at this
time i can't figure out where the advantage is. Anybody with more insight?
Kind Regards,
Jos Okhuijsen
----------------
Message 4
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| Subject: | Re: AW: RE: 914 Fuel System |
--> Europa-List message posted by: "danbish" <n914rb@earthlink.net>
[quote="gottfried.komaier at gmx."]
"as this version seems to me the only logical design
when flying at high altitudes. "
Are you flying yet? If not, do you know of anyone that is flying at these high
altitudes with the 914 and what configuration they are using? I agree, it seems
like an important issue to be having debate on and that Rotax or someone would
come down in a more definate fashion on it.
Thanks to all for the replys so far,
Dan
----------------
Message 5
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| Subject: | Re: AW: RE: 914 Fuel System |
--> Europa-List message posted by: "Vaughn & Gaye Teegarden" <N914VA@starband.net>
Dan
"If not, do you know of anyone that is flying at these high altitudes with
the 914 and what configuration they are using?"
Dave Anderson is flying his XS 914 with glider at 17,000'. He used to have a
web page with his build log, but I haven't looked for it lately so I will
have to. Formerly it could be accessed from the Europa site somehow.
Vaughn Teegarden
============================================================
>
>
>
Message 6
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| Subject: | Re: RE: 914 Fuel System |
--> Europa-List message posted by: "Craig Ellison" <craig.ellison2@verizon.net>
All,
I too had my system set up in parellel and changed to series after talking
to John H. One reason I remember of the conversation was about allowing
proper readings on the fuel pressure/MP differential gauge.
craig ellison
A205/N205CN
Almost ready to fly
----- Original Message -----
From: "josok" <josok-e@ukolo.fi>
Sent: Tuesday, February 21, 2006 12:14 AM
Subject: Europa-List: RE: 914 Fuel System
> --> Europa-List message posted by: "josok" <josok-e@ukolo.fi>
>
> Hi Dan,
>
> The difference is that in the tech talk, just as in the latest issue of
> the XS 914 engine manual the pumps are operating in serial. This seems to
> be a Rotax requirement. I intend to follow that requirement, although at
> this time i can't figure out where the advantage is. Anybody with more
> insight?
>
> Kind Regards,
>
> Jos Okhuijsen
> ----------------
>
>
>
Message 7
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| Subject: | Re: AW: RE: 914 Fuel System |
--> Europa-List message posted by: Jim Brown <acrojim@cfl.rr.com>
Vaughan,
We have an XS mono wheel, with the 914 installed. The fuel pumps are in parallel
which is what Rotax was preaching at the time of our installation.
We do a lot of long cross countries, and we fly in the high teens (15000-17500)
when
winds aloft are favorable. We have not experienced any fuel problems, at these
altitudes, and a lot of this time was using auto fuel....I would say we have at
least
20 hours logged at these altitudes.
Rotax has made a lot of changes since 2000, when we first flew our a/c. Several
times
different oils have been recommended, the coolant change, and now the fuel pump
change, to name a few. I thank as they see the operating experience of the 914
in
private hands, and the military, we will continue to see running changes as they
see
fit.
Just my thoughts.
Jim Brown
Vaughn & Gaye Teegarden wrote:
> --> Europa-List message posted by: "Vaughn & Gaye Teegarden" <N914VA@starband.net>
>
> Dan
>
> "If not, do you know of anyone that is flying at these high altitudes with
> the 914 and what configuration they are using?"
>
> Dave Anderson is flying his XS 914 with glider at 17,000'. He used to have a
> web page with his build log, but I haven't looked for it lately so I will
> have to. Formerly it could be accessed from the Europa site somehow.
>
> Vaughn Teegarden
> ============================================================
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
>
>
Message 8
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| Subject: | RE: 914 Fuel System |
--> Europa-List message posted by: "danbish" <n914rb@earthlink.net>
Thanks all. I'll have a look at Dave's site as I think I still have a link somewhere.
Good to hear there are those out there flying at significant altitude and
not experiencing problems.
All the best,
Dan
----------------
Message 9
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| Subject: | RE: 914 Fuel System |
--> Europa-List message posted by: "Steve Hagar" <hagargs@earthlink.net>
Pumps in parallel increase volume, pumps in series increase pressure. This
per Eric Tucker the Rotax class instructor.
Presently have pumps in parallel per initial instructions. Need to evaluate
what it will take to change it out. Does anyone out there know a 4 ft tall
90 lb mechanic?
Steve Hagar
A143
Mesa AZ
Spraying the last coat of primer on.
Steve Hagar
hagargs@earthlink.net
> [Original Message]
> From: josok <josok-e@ukolo.fi>
> Date: 2/21/2006 1:21:28 AM
> Subject: Europa-List: RE: 914 Fuel System
>
> --> Europa-List message posted by: "josok" <josok-e@ukolo.fi>
>
> Hi Dan,
>
> The difference is that in the tech talk, just as in the latest issue of
the XS 914 engine manual the pumps are operating in serial. This seems to
be a Rotax requirement. I intend to follow that requirement, although at
this time i can't figure out where the advantage is. Anybody with more
insight?
>
> Kind Regards,
>
> Jos Okhuijsen
> ----------------
>
>
>
>
>
>
>
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