While I am waiting for the new throttle and stuff to arrive I´ll get some work done on JU-02, it was a while since I last worked on it now.
First out for the evening was to cut the thick walled stainless pipe to the correct length, it will be used as the engine cover.
After that I continued where I left off, with the oil drain. I had cut a couple of stainless pipes to length so after aligning them I welded them together. No fancy radiuses on the drain line unfortunately since the combustor will be placed just outside it.
Something I hadn´t figured out earlier was how to route the drain line out through the engine cover without any oil or air leaks, but now I figured out a pretty neat solution in my humble opinion.
The idea is to have the drain pipe split in two where the inner pipe is the one on the picture above and the outer one in inserted through a hole in the casing with an air tight flange welded to it. The connection between the two pipe ends will be made with the following contraption, an O-ringed coupling that allows the outer pipe to slip into the inner pipe where the O-ring seals them together so no oil can leak out or air leak in.
Here are the two coupling halves with the O-ring in place.
Perhaps the picture gets a bit clearer now, the foremost pipe end will seal inside the O-ring which is flexible enough to allow for a certain degree of misalignment.
Here the pipes are fitted together, I just need to make some sort of bracket for the internal oil line so it will stay in place but still allow for some heat expansion.
Cheers!
/Anders
Topic: APS/Ω Gas turbine bike build (Read 1003284 times)