RV-9A: Fuselage Plumbing - 1/26/2010
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 Trial fit of the Andair Fuel Switch
While I'm waiting for my Facet Fuel Pump and my tube of EZ Turn Lubricant/Sealant, I'm doing a trial fit of the Andair Fuel Switch to make sure everything lines up with the fuel lines so far. I think this fuel switch is much better than the one that comes with the kit. The standard fuel switch is ugly and requires you to cross the fuel lines over each other to get the "left" and "right" fuel tank connection. The standard switch also has the fuel connections aft of the switch knob, where the Andair switch has the connections in front of the switch knob, making it easier to "make the connection".
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 Making the Foam Sandwich
The instructions talk about a "Foam Sandwich" to position the fuel and brake lines between the bottom skin of the fuselage the center console cover, preventing the lines from touching the skin and cover, but also from touching each other along the trek from the main wing spar to the firewall. I did a search on Van's Air Force and found an entry by Finley Atherton where he put a layer of 1/4 inch Super Soundingproofing on the fuselage skin and on the bottom of the center console cover. I just happened to have enough Super Soundproofing left over to do the job. I did a trial fit and the 3/8 inch fuel tubing fits snugly (is that a word?) between the soundproofing "sandwich". The fuel line won't be able to vibrate around at all. I also bought some 3/8 inch Polyethylene Tubing from Lowes Lumber and Aircraft Supply that I will wrap round the 1/4 inch brake lines to keep the separated from the fuel line and also prevent vibration. The fuel line won't require a rubber tubing wrapper.
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