Made a small modification to our header tank to optimize the fuel return for our fuel-injected engine. We welded on another AN6 bung a little further down from the top of the header tank which allows us to locate the fuel return a bit lower. This allows any returning fuel vapor to cool and condense before rising and venting to the wing.
After welding, a 24 hour pressure test at 9psi was run and it lost a little pressure. With soapy water, I found a slow pinhole leak. The pinhole was welded closed and the tank was retested. This time it held pressure for 24 hours, so the problem was fixed.
 |
| Pressure test on header tank |
Planned out some of the fuel line routing, and installed a fuel shut-off valve.
Two mounting brackets and a tray were fabricated for mounting the Rotax fuel pumps. The tray was riveted to the brackets and the brackets were installed with Adel clamps.
 |
| Fuel pumps installed |
A few small nose-gear spacers were painted gloss black, and the nose gear was reassembled.
Two covers were also created to enclose the landing gear holes in the bottom of the fuselage. The back edge required a slight bend to match the profile of the fuselage. Holes were drilled to match the existing nut plates that were previously installed in the lower support tubing. These came out looking nice. Hours: 24
 |
| Aluminum cover for landing gear (2 were made) |
No comments:
Post a Comment