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rowlandcarson(at)gmail.co
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 Posted: Thu Nov 20, 2014 12:18 pm Post subject: firewall mountings and penetrations |
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I’m thinking about where some of the things that are mounted on or penetrate the firewall would be best located. Obviously there are some things like the throttle and choke cables that have to go through in a certain area to maintain a smooth line, but other things seem to have no specific constraints, just a lot of interdependencies.
For instance, I’d like to settle on a position for mounting the “forest of tabs” (from B&C Specialty) that I’m using for all ground connexions (so I know how long the wires to it, including service loops, should be). However, I don’t want to drill holes for that and then find it’s going to be obstructed by the battery or get in the way of the nicest line for the hose from the vacuum pump. (Thinking again about the battery, I seem to recall that most folk mount them on top of the starboard footwell, because there’s nothing likely to be coming through the firewall above the sandwich shelf - Bob’s photo mentioned below supports this observation.)
Then there are all the other wires that need to penetrate the firewall - I reckon most will be in a big bunch to minimise the number of holes, although custom and practice seems to indicate that the mag leads should be well-segregated from all others. What about finding good airflow in which to mount the regulator? Is there an ideal place for the ammeter shunt? The fuel supply & return lines will be down at tunnel level, I guess.
What might help me is to see pictures of other folks’ (Rotax 912/912S) firewall layouts, preferably in a picture taken from the engine side. I’ve not seen many Europas sufficiently undressed to take this sort of picture myself. I’ve had a quick look through the select few pictures on the Matronics Europa picture archive and have only seen one Rotax firewall picture, from Bob Harrison.
Would anyone care to give me links to this sort of picture of their own machine, please?
Thanks to anyone who can help.
in friendship
Rowland
| Rowland Carson ... that's Rowland with a 'w' ...
| <rowlandcarson(at)gmail.com> http://www.rowlandcarson.org.uk
| Skype, Twitter: rowland_carson Facebook: Rowland Carson
| pictures: http://picasaweb.google.com/rowlandcarson
| | - The Matronics Europa-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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graeme bird
Joined: 15 Jul 2010
Posts: 434
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| Posted: Sat Nov 22, 2014 7:01 am Post subject: Re: firewall mountings and penetrations |
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My battery is on the Port footwell, I took two power and the two earth(s) through using brass studds just above the battery position. All the low current stuff went through on a couple of 'D' connectors mounted on one side (engine) above the battery position , the plug plugging in from the other cockpit panel side.
| | - The Matronics Europa-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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_________________
Graeme Bird
kit4 (Wagstaff) TBD
Kit3 G-CLXU (Gregory) mono 914 xs Woodcomp
Kit2 G-PATS - (kesterton) Mono Classic 912 warpdrive
Kit 1 G-UMPY - Mono Classic/XS 912S, Woodcomp G(@)gdbmk.co.uk |
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rampil
Joined: 04 May 2007
Posts: 870
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| Posted: Sun Nov 23, 2014 10:25 am Post subject: Re: firewall mountings and penetrations |
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A few suggestions:
1. Make access panels in the firewall above the footwell. Layer the panel
with stainless on the engine side. The panel is absolutely invaluable to
reach and work on the inside of the panel module without having to
remove it from aircraft.
2. Plan ahead that there will be times where removal of the instrument
panel will necessary. fixed wires running through to the engine area will
preclude that. The safest, most reasonable approach is to use multipin,
metal shell circular amphenol connectors
| | - The Matronics Europa-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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_________________
Ira N224XS |
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