Joshua's RV-9A Project

Worked on the fuel pump doubler, bracket, pump install, and selector-pump tubing.  Fabricated a doubler to go under the tunnel cover for support of the pump, out of a piece of .063 stock.  This will be riveted to the tunnel cover, then the pump will attach via screws/nutplates, and the shortened pump doghouse will attach over that.  i think it should work out well.

Much frustration ensued with the seemingly easy tube between selector and filter, but the short distance and radius of the bends actually make it very difficult, because the bottom bend must go nearly 180 degrees, then a 90 back vertical, and the distance between the flare and bend is very short, making flaring a challenge.  I gave up after 4 tries, which usually ended up with flattened, bulging, or kinked tubing.  I think a better option may be to use a swivel elbow on the filter inlet, and a “joggled” vertical tube between the selector and the elbow.  I have the elbow for another task, so I’ll try that–I can always order another if it works.

This entry was posted on Wednesday, June 23rd, 2010 at 11:26 pm and is filed under Plumbing. You can follow any responses to this entry through the RSS 2.0 feed. Both comments and pings are currently closed.