Vent Lines

After installing the Fuel Lines, I’m getting more and more familiar with the Aluminum Tube hand bender. Time to go for the Vent Lines. The tubing is thinner and the routing is plain crazy. The reason is the aerobatic capabilities of the RV-7. It shouldn’t gush out all the Fuel through the Vent Lines with negative G’s.

While my dad is grinding the air intake bulkhead, I’m enlarging the pilot holes in the bottom for these bulkheads. I decided to NOT take a normal bulkhead and grind it to 45 degrees, but take a 45 degree bulkhead and make it a little smaller. This allows to insert a nice filter.

We are inserting the Rudder pedals to check that the Vent Lines are not preventing the Pedals in their movement.

I used some old Fuel Lines from my first attempt and crudely bend them as if they were the Vent Lines. This gives us a nice template for the real Vent Lines.

Here you can see the creazy routing the Vent Lines take and the hard part is to NOT forget to insert the bulkhead fitting before tapering the end. Also the last bend is hard, because it is so close to the end of the Vent Line.

With the right side finished, the left is easier.

We now know all the pitfalls and tricks to create a nice Vent Line.

Whooohooo, really excited and pleased with the result. Especially with the frustration of doing the Fuel Lines all over again. The Vent Lines went way better.


You can see the curve around the Rudder cables and toward the bulkhead to the wings. The red color on the bottom is NOT my blood, but ink of the type numbers on the Aluminum. Somehow these get more pronounced after priming.

Last part is finishing of the intake of the Vent Lines.

I use normal water tap filters, modify them and insert them in the bulkhead. This prevents the Vent Lines of sucking up dirt and contaminating my Fuel Tanks.

Time: 4 Hours, Rivets:  0/0 (2020-05-05)
Time: 3 Hours, Rivets:  0/0 (2020-05-07)


Leave a Reply

Your email address will not be published. Required fields are marked *