While making the final adjustments to the JU-01 engine and racing the bike I will build a new and more powerful JU-02 engine during the next couple of years, it will use the same exhaust turbine as the JU-01 but have a significantly larger compressor wheel to increase both boost pressure and mass flow.
My friend John Wallis is the guy behind the calculations for the JU-02 engine and has donated a set of rotary parts for the cause, it is sort of a combined effort where he is the brains and I am the muscles. *LOL*
I will build the JU-02 as an updated big sister for the JU-01, most of the design is sound and the gremlins are sorted out so I´ll only change a few things that I think I can make improvements to. To start with I made a drawing in Inventor Fusion of the sand casting pattern for the compressor diffusor, and yesterday I started 3D printing it.
Here is a series of pictures from the printing process, it took 18 hours to complete with 0.2mm layers and 20% infill.
The wedges has a 1° taper to make it easier to remove from the casting sand, after some sanding down I think it will be smooth enough to work.
I got the rotor assembly 3D scanned this summer and a couple of weeks ago I printed a copy of the compressor wheel just for fun. It lacks the protruding rear center so I could fit it to the diffusor to see how things line up.
As you could see in the pics during printing there are two alignment holes on the back of the pattern, the thrust bearing housing on the rear of the diffusor plate has to be printed as a separate piece since it needs to be removable during the sand casting process.
Cheers!
/Anders