>My XS Tri-Gear has always smelt of petrol, whatever the level of fuel in
>the tank, until the air is changed during flight. When opening up the
>smell is quite nauseating. Worse when using Mogas than it is with Avgas,
>but always very obvious. I have come to the conclusion that it must be a
>combination of all the things people have mentioned with perhaps the
>greatest contribution coming from the fuel filler pipe - because of its
>physical area.
>
>I intend to add the Europa mod to cover over the filler pipe. I would
>also like to replace all the rubber fuel lines with something less
>'porous' if this is practical - and then look carefully at the Avelec
>fitting in the top of the tank.
>
>Mark G-CHET
Mark,
The simplest is to go solid aluminium from the tank to the firewall, then
flexible to the engine. PTFE is the least porous of the flexibles, IMHO.
I have made tank outlet fittings with 3 NPT threaded holes to allow flared
fittings for fuel supply, fuel return and sight gauge / pressure sensor.
Email me privately ifyou would like more details.
Graham
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