Re: Fuel line fittings
Posted: Sat Sep 03, 2022 3:33 pm
Bryan Cotton wrote:I did a combination of hard line and braided line - all AN fittings. Documented on page 102 of my thread:
http://www.sonexbuilders.net/viewtopic. ... start=1010
This is very much like the arrangement on my plane. That hard line from the valve to the firewall took be the better part of a day to get right. The length and the bend need to be quite precise, and you need to assemble both ends, and flare them. Once you have the fittings on, little micro adjustments are TOUGH without collapsing the tubing. And tightening the aft flare fitting at the firewall was a Bee-Yatch.
The plans just have a hard line running through a hole in the firewall. ANY connection you need to make happens where it is easy to see, easy to reach, and you don't have to work to tight tolerances. Keeping the firewall from chafing through the aluminum tubing, while keeping the fire and heat on the engine side is the only challenge, and Bingelis has suggestions on that front.
I'm not knocking what you did, it's all to "code", and it's VERY much like I did, but as I say, I would NOT do it that way again if I was starting from scratch.