This is the TMG which I showed in a previous video, I have been fortunate is being able to aquire an aluminium container which I have fitted with the intention of filling with Helium, Unfortunately the Helium being lighter than air tends to migrate to the top of the engine and the heavy air sinks to the bottom. It is very difficult to purge the engine of air. Having tried running with Helium I found that the power developed was more than the alternator was able to absorb resulting in the magnets hitting the laminated pole pieces. In another video I will explain the function of the brass component protruding from the side.