Today's Message Index:
----------------------
1. 02:09 AM - thro the fire wall (Graham Singleton)
2. 02:09 AM - thru the firewall (Graham Singleton)
3. 08:10 AM - Re: thru the fire wall (Rob Housman)
4. 09:58 AM - thro'the fire wall (paul stewart)
5. 10:50 AM - Re: thro the fire wall (Jim Brown)
6. 12:08 PM - Re: thro the fire wall (Rob Housman)
7. 09:40 PM - Re: SPA400 Intercom (RUSSnHEDY@aol.com)
Message 1
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| Subject: | thro the fire wall |
--> Europa-List message posted by: Graham Singleton <graham@gflight.f9.co.uk>
--=======70A42F86=======
At 23:56 07/10/2003 -0700, you wrote:
><paul-d.stewart@virgin.net>
>This engine (914) is throwing up more questions then the whole of the
>project so far. Having disconnected the TCU and wastegate servo to mount
>them aft of the firewall,
>I'm guessing that folk make holes to take the pressure sensors etc.
>rather than the large TCU block connector through the fire wall. What is
>a 'suitable method' of sealing - anyone got a pic or two. I suspect
>seeing this sort of thing would be a great help.
>Paul #432
Paul (McAllister) & I went through this a week or two ago. Try and persuade
him to update his website. Don't think I took any pictures at the time.
I did photograph the minor mods we made to the cooling air intake trunk.
Graham
--=======70A42F86=======
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Message 2
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| Subject: | thru the firewall |
--> Europa-List message posted by: Graham Singleton <graham@gflight.f9.co.uk>
--=======26153F76=======
At 23:56 07/10/2003 -0700, you wrote:
>I cut a rectangular hole in the firewall large enough to
>easily fit the connector through. The aluminum was cut in a rectangle to
>overlap the hole by a goodly amount
Better still, use the piece of phenolic you cut from the front of the
tunnel. Also, make it big enough to do the wiring connections to the panel,
or even take out the odd instrument, after the panel is in place. A lot of
people have done this
Graham
--=======26153F76=======
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Message 3
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| Subject: | thru the fire wall |
--> Europa-List message posted by: "Rob Housman" <RobH@hyperion-ef.com>
There is an elegant solution at
http://www.aeroelectric.com/articles/Firewall_Penetration/firewall.html that
I have used for my 914 installation. After agonizing over how to stuff
those rather large connectors through the firewall I found this method by
participating in the AeroElectric-List; - see
http://www.aeroelectric.com/consulting.html for more info. I would urge all
builders to participate in this list and to get a copy of "the book" by Bob
Nuckolls, http://www.aeroelectric.com/Catalog/pub/pub.html#aec9
Being really paranoid about cutting big holes in the firewall, I have used a
slight modification of the feed-through suggested by Bob. Using a standard
12 inch long, 1.25 inch diameter, 304 stainless steel "grab bar" from
McMaster Carr http://www.mcmaster.com/ (p/n 2823K32, US$19.05) as a starting
point, I cut off both flanged "elbows" and then cut each along its
centerline to create a matched set of top and bottom pieces (actually I had
to cut slightly off centerline because of the saw kerf, and discarded the
two smaller pieces - four "halves" make one set). Now I had a split elbow
that would allow passage of the large connectors on the engine side of the
firewall through a minimum size hole in the phenolic firewall, and by using
a stainless steel hose clamp at each end of the elbow, both halves of the
"clamshell" were reunited. The rest of the scheme follows Bob's method.
The flange is sandwiched to the firewall by a large phenolic washer cut from
the material removed prior to installation of the landing gear mounting
frame.
Rotax has a strange concept of how their engines will be installed. Most of
the cables from the TCU have connectors neatly installed by the factory at
each end which discourages cutting them to length, and splicing just adds
another connection that may eventually fail. The two cables from the TCU
through the firewall to the pressure sensors are so short that it is almost
impossible to make them reach, and others such as the connections to the
waste gate servo are ridiculously long. It is essential that the location
selected for the TCU, the pass-through, and the bracket for the pressure
sensors be chosen very carefully or the cables will not reach. The waste
gate arrangement is particularly bizarre because it is tethered by a
mechanical linkage that is much shorter than the electrical cables.
Neither the Rotax installation manual nor the Europa engine installation
manual hints at how to make the short cables reach.
Another point about locating the TCU - keep it away from the avionics stack
or it will interfere with deep radios such as the GarminAT (formerly UPS
Apollo) CNX80 and SL70, each of which is too deep to fit the standard
(unmodified) Europa panel even with the TCU out of the way.
Rob Housman
A070
Best regards,
Rob Housman
Europa XS Tri-Gear A070
Airframe complete
Irvine, CA
-----Original Message-----
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com]On Behalf Of paul stewart
Subject: Europa-List: thro the fire wall
--> Europa-List message posted by: "paul stewart"
<paul-d.stewart@virgin.net>
This engine (914) is throwing up more questions then the whole of the
project so far. Having disconnected the TCU and wastegate servo to mount
them aft of the firewall, the manual very succinctly tells me to make
holes as small as possible and use a suitable method of sealing.
I'm guessing that folk make holes to take the pressure sensors etc.
rather than the large TCU block connector through the fire wall. What is
a 'suitable method' of sealing - anyone got a pic or two. I suspect
seeing this sort of thing would be a great help.
Regards and thanks in anticipation
Paul #432
<HTML><HEAD>
<META content"MSHTML 6.00.2800.1226" nameGENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor#ffffff>
<DIV><FONT faceArial size2>This engine (914) is throwing up more
questions
then the whole of the project so far. Having disconnected the TCU and
wastegate
servo to mount them aft of the firewall, the manual very
succinctly tells
me to make holes as small as possible and use a suitable method of
sealing.</FONT></DIV>
<DIV><FONT faceArial size2></FONT> </DIV>
<DIV><FONT faceArial size2>I'm guessing that folk make holes to
take the
pressure sensors etc. rather than the large TCU block connector through
the fire
wall. What is a 'suitable method' of sealing - anyone got a pic or two.
I
suspect seeing this sort of thing would be a great help.</FONT></DIV>
<DIV><FONT faceArial size2></FONT> </DIV>
<DIV><FONT faceArial size2>Regards and thanks in
anticipation</FONT></DIV>
<DIV><FONT faceArial size2></FONT> </DIV>
<DIV><FONT faceArial size2>Paul
#432</FONT></DIV></BODY></HTML>
Message 4
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| Subject: | thro'the fire wall |
--> Europa-List message posted by: "paul stewart" <paul-d.stewart@virgin.net>
Many thanks for all the responses - its so gratifying to realise that
others have wondered the same things. Several elegant solutions and the
pictures once again speak more than the preverbial 100 wrds.
Paul
<HTML><HEAD>
<META content"MSHTML 6.00.2800.1226" nameGENERATOR>
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<DIV><FONT faceArial size2>Many thanks for all the responses - its
so
gratifying to realise that others have wondered the same things. Several
elegant
solutions and the pictures once again speak more than the preverbial 100
wrds.</FONT></DIV>
<DIV><FONT faceArial size2></FONT> </DIV>
<DIV><FONT faceArial size2>Paul</FONT></DIV></BODY></HTML>
Message 5
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| Subject: | Re: thro the fire wall |
--> Europa-List message posted by: Jim Brown <acrojim@cfl.rr.com>
Paul;
Having the same questions about the TCU and Wastgate servo when I was at your
build point in the process.
I attached my TCU on the engine side of the firewall, and the wastegate servo on
top of the foot well on the passenger side. I then put a blast tube to flow
outside air the the TCU. In 500 hours of operation no problems so far.
The added advantage if I need to work on either, or replace either, they are
where I can get at them without pulling the panel.
Jim
N398JB
paul stewart wrote:
> --> Europa-List message posted by: "paul stewart" <paul-d.stewart@virgin.net>
>
> This engine (914) is throwing up more questions then the whole of the
> project so far. Having disconnected the TCU and wastegate servo to mount
> them aft of the firewall, the manual very succinctly tells me to make
> holes as small as possible and use a suitable method of sealing.
>
> I'm guessing that folk make holes to take the pressure sensors etc.
> rather than the large TCU block connector through the fire wall. What is
> a 'suitable method' of sealing - anyone got a pic or two. I suspect
> seeing this sort of thing would be a great help.
>
> Regards and thanks in anticipation
>
> Paul #432
>
> <HTML><HEAD>
> <META content"MSHTML 6.00.2800.1226" nameGENERATOR>
> <STYLE></STYLE>
> </HEAD>
> <BODY bgColor#ffffff>
> <DIV><FONT faceArial size2>This engine (914) is throwing up more
> questions
> then the whole of the project so far. Having disconnected the TCU and
> wastegate
> servo to mount them aft of the firewall, the manual very
> succinctly tells
> me to make holes as small as possible and use a suitable method of
> sealing.</FONT></DIV>
> <DIV><FONT faceArial size2></FONT> </DIV>
> <DIV><FONT faceArial size2>I'm guessing that folk make holes to
> take the
> pressure sensors etc. rather than the large TCU block connector through
> the fire
> wall. What is a 'suitable method' of sealing - anyone got a pic or two.
> I
> suspect seeing this sort of thing would be a great help.</FONT></DIV>
> <DIV><FONT faceArial size2></FONT> </DIV>
> <DIV><FONT faceArial size2>Regards and thanks in
> anticipation</FONT></DIV>
> <DIV><FONT faceArial size2></FONT> </DIV>
> <DIV><FONT faceArial size2>Paul
> #432</FONT></DIV></BODY></HTML>
>
Message 6
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| Subject: | thro the fire wall |
--> Europa-List message posted by: "Rob Housman" <RobH@hyperion-ef.com>
If you can trust Rotax to know what is correct, this from the 914
Installation Manual should be our guide:
"WARNING: Installation in the engine compartment is not permitted since
the
TCU is not of a fire resistant construction.
A recommendable location is in the cockpit, below the instrument panel."
Best regards,
Rob Housman
Europa XS Tri-Gear A070
Airframe complete
Irvine, CA
-----Original Message-----
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com]On Behalf Of Jim Brown
Subject: Re: Europa-List: thro the fire wall
--> Europa-List message posted by: Jim Brown <acrojim@cfl.rr.com>
Paul;
Having the same questions about the TCU and Wastgate servo when I was at
your
build point in the process.
I attached my TCU on the engine side of the firewall, and the wastegate
servo on
top of the foot well on the passenger side. I then put a blast tube to
flow
outside air the the TCU. In 500 hours of operation no problems so far.
The added advantage if I need to work on either, or replace either, they are
where I can get at them without pulling the panel.
Jim
N398JB
paul stewart wrote:
> --> Europa-List message posted by: "paul stewart"
<paul-d.stewart@virgin.net>
>
> This engine (914) is throwing up more questions then the whole of the
> project so far. Having disconnected the TCU and wastegate servo to mount
> them aft of the firewall, the manual very succinctly tells me to make
> holes as small as possible and use a suitable method of sealing.
>
> I'm guessing that folk make holes to take the pressure sensors etc.
> rather than the large TCU block connector through the fire wall. What is
> a 'suitable method' of sealing - anyone got a pic or two. I suspect
> seeing this sort of thing would be a great help.
>
> Regards and thanks in anticipation
>
> Paul #432
>
> <HTML><HEAD>
> <META content"MSHTML 6.00.2800.1226" nameGENERATOR>
> <STYLE></STYLE>
> </HEAD>
> <BODY bgColor#ffffff>
> <DIV><FONT faceArial size2>This engine (914) is throwing up more
> questions
> then the whole of the project so far. Having disconnected the TCU and
> wastegate
> servo to mount them aft of the firewall, the manual very
> succinctly tells
> me to make holes as small as possible and use a suitable method of
> sealing.</FONT></DIV>
> <DIV><FONT faceArial size2></FONT> </DIV>
> <DIV><FONT faceArial size2>I'm guessing that folk make holes to
> take the
> pressure sensors etc. rather than the large TCU block connector through
> the fire
> wall. What is a 'suitable method' of sealing - anyone got a pic or two.
> I
> suspect seeing this sort of thing would be a great help.</FONT></DIV>
> <DIV><FONT faceArial size2></FONT> </DIV>
> <DIV><FONT faceArial size2>Regards and thanks in
> anticipation</FONT></DIV>
> <DIV><FONT faceArial size2></FONT> </DIV>
> <DIV><FONT faceArial size2>Paul
> #432</FONT></DIV></BODY></HTML>
>
Message 7
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| Subject: | Re: SPA400 Intercom |
--> Europa-List message posted by: RUSSnHEDY@aol.com
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