x3heimmr

OK, here’s some more progress. Don’t worry, I’m not going to stop building this plane until it is done – but there may be some times when I get busy with other things and have to break for a few weeks.

I have still been working on the engine box. It is now done and installed into the fuse. It is epoxied in with tri stock on both sides of each former. I used ½” stock in front of the firewall – then 3/8” stock on all other places. The plans do not call of any right thrust or down thrust. I am building in 1 ½ deg right and no down. You can see the right thrust in the pic looking down from the top of the fuse. Compare the front of the motor mount with the firewall of the fuse. I made two spacers out of UHMW (ultra high molecular weight polyethylene.) It is what a lot of cutting boards are made of. The spacers are the white colored pieces. I made the spacers different heights to set the motor mount on 1 ½ deg to the right. The motor mount is also offset to the left so the prop shaft will come out in the center of the cowl.

You can see the Robart air tank mounted on the outside of the engine box. The gas tank is now mounted inside the engine box. I am going with a two line setup. There are many threads in the gas engine forum on setting up the lines for a gas tank. There will be a filter in the vent line to keep trash from getting in. There will be a filter between the fuel valve and the engine as well.

Next up, I have to make a major decision. Should I make the exhaust come out at the waste gate location as on the real plane or just exit straight down out of the cowl?