The left tank is complete, and the testing issues with the right tank resolved. The right tank tested just fine once I got the filler cap sealed (requires two layers of packaging tape applied very diligently and cleanly) and the balloon sealed on (might recommend folks really take their time with this one, sealing that […]
While I get the testing on the right tank sorted out, I’ve started the left tank. First clecoed together and fitted, I then took the same steps forward, starting by riveting the filler neck and the stiffeners. I’m not very happy with some of the rivets. They appear to be sitting a few thousands of […]
The fuel tank appears to have leaks… or at least something in the system does. The balloon deflates after a few hours. At times it appears to hold but the falls flat. Other times, this happens quicker. I believe the leaks are in the testing system. I.e. the balloon, balloon fitting, or the tape sealing […]
The first tank is completed. I’ve brought it inside in order to help the tank sealant cure fully prior to testing. The garage is cold, and I thought there might be portions of the sealant that don’t fully cure in the minimum 48 hour time they suggest for curing.
Construction on the right tank continues, this time with sealant and riveting. The tank sealant (tank taffy) is pretty nasty stuff. I got the filler neck on, which was a good introduction to riveting with sealant in the mix. It makes everything more difficult. I wound up being able to do two ribs in one […]
The fuel tanks require some meaty brackets on the inboard leading edge. They’re fabricated from angle stock, cutting an airfoil shape one way, and a bell-curve-esque shape the other. Time and care was spent here, and it paid off. However, I wouldn’t have minded taking a bit more off initially, especially where the curves met […]