Hi! Paul.
I copied a Factory cut out panel to give access to the rear of the panel and
instruments then also decided to do another cut out behind the radio stack
since I was having to get calculations done for the first one.
It is quite critical that any holes are made good by flange strengthening
the perimeter of any cut outs. I used 2" wide1/16 thick stainless with
stainless pop rivets (to ensure the fire wall remained intact) about every
two inches spacing round to fix the flange to the rear of the firewall
then used anchor nuts on the inner portion of the flange to clamp the
removable piece of firewall back into place with bolts and spreader washers
also every 2 " spaced. However I also embodied a sheet of thin aluminium
over the entire rear of the firewall to stop radio interference from the
induced ignition system. This sheet of alloy was also considered to be part
of the new structures strength capability.
If you visit the support pages operated by John Cliff , click on to "Bob
Harison's Europa" and select "Firewall" you will get the idea. The PFA do
have an approved mod. submission for it . In addition you will see that the
rectangular portion behind the radio stack also coincides with the flanges
of the Air Filter Housing ( Jabiru!) which also serves to stiffen the
assembly back to the original integrity.( http://www.crix.org.uk )
My panel is now not required to be removed because all access can be made
---From the forward firewall position except to coin the frase it is "very busy
in there"!
Regards
Bob Harrison G-PTAG Europa MKI/ Jabiru 3300
----- Original Message -----
From: "Paul Stewart" <europa@pstewart.f2s.com>
Subject: Europa-List: firewall penetration
>
> I have seen some vey neat ways of getting stuff thro' the firewall,
> often with quite large panels removed. Does anyone know what the
> implications for strength are and if the PFA/factory would have a view
> on minimising cutting the firewall ?
>
> Regards
>
> Paul Stewart #432
>
>
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