Sealing gasket for fuel filler pipe through curved deck ply
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Sealing gasket for fuel filler pipe through curved deck ply
Hi Guys,
I'm after a good way of sealing around the fuel tank filler where it emerges through the front decking, mid-way between the firewall and the canopy.
There has to be some clearance when the tank is first installed (and it's preferable to allow for removal and re-installation in case of a problem with the tank) and in any case it's not that easy to get a perfect fit. So how do you prevent surplus fuel finding its way down the cracks between the deck and the outside of the filler tube?
What have you seen that really works? Are there Viton gaskets available, for example that would work on curved surfaces? I guess that sealing around the filler on a curved wing surface is just as difficult. Am I missing an obvious solution?
On G-TREK, the filler tube emerges from the fuselage side skin (as the tank is behind the seat) and I just crammed in some very old and putty-like zinc chromate which, to my surprise, has held up for many years, possibly because it has some tough polyurthane paint on top of a tight fabric layer. But there must be a better way! Helpul pointers would be much appreciated.
Richard
I'm after a good way of sealing around the fuel tank filler where it emerges through the front decking, mid-way between the firewall and the canopy.
There has to be some clearance when the tank is first installed (and it's preferable to allow for removal and re-installation in case of a problem with the tank) and in any case it's not that easy to get a perfect fit. So how do you prevent surplus fuel finding its way down the cracks between the deck and the outside of the filler tube?
What have you seen that really works? Are there Viton gaskets available, for example that would work on curved surfaces? I guess that sealing around the filler on a curved wing surface is just as difficult. Am I missing an obvious solution?
On G-TREK, the filler tube emerges from the fuselage side skin (as the tank is behind the seat) and I just crammed in some very old and putty-like zinc chromate which, to my surprise, has held up for many years, possibly because it has some tough polyurthane paint on top of a tight fabric layer. But there must be a better way! Helpul pointers would be much appreciated.
Richard
Richard
I'm trying to come up with a solution to a very similar problem with a group owned Aeronca and would also be interested in any solutions offered.
On my Boredom Fighter project, there is a ring shaped scupper welded to the tank and surrounding the filler neck, with a drain pipe leading overboard. This is not an answer for the Aeronca. There is an expensive moulded rubber part available in the States, but the tank filler neck is not centrally located in the hole in the decking, so it wouldn't fit very well, anyway.
I had thought of making a slightly conical disc of thin aluminium with an inner disc of 1/8"(say) rubber sheet sandwiched underneath and forming a tight push fit over the filler neck. The outer aluminium could then be pop riveted in three or four places to the coming/fuselage decking.
Any better ideas gratefully received!
Ian
On my Boredom Fighter project, there is a ring shaped scupper welded to the tank and surrounding the filler neck, with a drain pipe leading overboard. This is not an answer for the Aeronca. There is an expensive moulded rubber part available in the States, but the tank filler neck is not centrally located in the hole in the decking, so it wouldn't fit very well, anyway.
I had thought of making a slightly conical disc of thin aluminium with an inner disc of 1/8"(say) rubber sheet sandwiched underneath and forming a tight push fit over the filler neck. The outer aluminium could then be pop riveted in three or four places to the coming/fuselage decking.
Any better ideas gratefully received!
Ian
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Richard, I've used black RTV on my D112 but I'm interested in the rubber seal. Sussex Classic Car Parts has them, with a photo on eBay http://cgi.ebay.co.uk/FUEL-FILLER-NECK- ... otohosting
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- Posts: 213
- Joined: Wed Jan 02, 2008 7:06 pm
- Location: East Midlands
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- Posts: 213
- Joined: Wed Jan 02, 2008 7:06 pm
- Location: East Midlands
-
- Posts: 213
- Joined: Wed Jan 02, 2008 7:06 pm
- Location: East Midlands