uuccio(at)gmail.com
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 Posted: Sun Jul 20, 2014 7:15 pm Post subject: polyethylene tanks and fuel ports (used to be in-line filter |
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Hi Guy, thank for your feedback… yeah, those are scary thoughts. I did mean to add “and then glass them over” to my original post in fact.
But it turns out my wing tanks are not made of resin after all; a friend who is more knowledgeable than me in these matters told me they look like they are polyethylene, or maybe a kind of nylon, like the Kitfox header tank. So gluing will be difficult and I’m not sure glassing them will work either: it looks like I will not be able to fit finger strainers (or fuel drain valves) to either wing tank as I can’t find a viable way to attach the fuel ports/aluminum flanges to the tank walls. (As they need to be close to the trailing edge of the wing, it’s not feasible to fit a counter-nut on the inside of the tank either).
Instead of finger strainers on each wing, I’m thinking of fitting a single finger strainer to the header tank. It looks like this can be done without too much difficulty if I can tin-solder some brass mesh to the fuel port (the finger strainers they sell at ACS seem to be made that way… in fact I’m having trouble finding brass mesh so I may have to cut some from one of the ACS strainers).
sacha
From: owner-rotaxengines-list-server(at)matronics.com [mailto:owner-rotaxengines-list-server(at)matronics.com] On Behalf Of Guy Buchanan
Sent: Sunday, 20 July, 2014 07:07
To: rotaxengines-list(at)matronics.com
Subject: Re: in-line fuel filters - can you recommend any?
Sorry for the late reply, Sacha, I've been out of town.
That might work. You must be very careful to sand, clean, then use something like MetalPrep, then Alodine, to prep the surface of the aluminum so you get a really good bond. It will seriously ruin your day to have this flange pop off with the finger strainer in place, thereby letting the entire tank of fuel drain into your wing. > (Meaning: I would never do it, unless I glassed over it after bonding it.)
Guy Buchanan
Ramona, CA
Kitfox IV-1200 / 912-S / Warp 3cs / 500 hrs. and grounded
Now a glider pilot, too.
On 7/16/2014 8:50 PM, Sacha wrote:
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What do you think of the idea of gluing aluminum welding flanges to the outside of the tank using two-part epoxy resin/glue or some other adhesive. Would it work?
Once the flanges are glued i could drill holes in the tank and then screw the finger strainers/fuel drains in place.
The flange for the fuel port could be cut so that it can sit lower down.
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