Gerry,
I installed an elliptical tank inspection hole between the headrests. Andy
Draper at Europa told me that the rule of thumb for reinforcement around a
hole rim is to apply 3 times the VOLUME of the composite removed by making
the hole (ignoring the foam core). In the case of the cockpit module, the
glass is 300 gms/sq.m. and there are 2 laminates on top, one underneath.
Your 0.031725m radius hole thus had pi x 0.031725 squared x 3 x 300 = 2.846
gms in it. Reinforce the rim with 3 times this = 8.5 grammes of glass. Bid
supplied with the kit is 280gms per sq. m. The weights of the fabric which
went into the hole and that used for the reinforcement, are near enough to
give you very similar volumes when wetted out.
I cleared out the foam 5 mm back around the hole edge and filled it with
flox before glassing.
PFA cleared my mod on this basis,
Hope this helps
Dave Simpson
-----Original Message-----
From: Gerry Cole <gccole13@cwcom.net>
Date: 17 April 1999 10:07
Subject: Lyndhurst Touchdown Services fuel level indicator -
PFA requirements
>Please can anyone help, I am new to the game of clearing mods with the
>PFA. I want to fit the LTS 9-step fuel level indicator, as described by
>Jim Naylor in Europa Flyer no 19. I've got the unit but LTS is currently
>closed to next week and I can't contact Jim. As a result I've drawn a
>blank at the PFA.
>
>1. Does anyone have the PFA mod number for this installation?
>
>2. Can anyone confirm that the PFA accept a total of four (two either
>side) layers of bid to re-inforce the 2 1/2 inch diameter access hole?
>The hole will be just inboard of the left headrest. ( The main hole in
>the tank itself will be 1 1/2 inch dia.)
>
>I'm ready to put the tank into the cockpit module - a very slow build-
>but can't move until I' m sure of the facts.
>
>Gerry Cole , no 121, gccole13@cwcom.net
>
>
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