Here are a few pictures of my engines. The detailed builds are on MEM.
The first engine was designed and started when I was at secondary school. It was finished over many years as and when workshop facilities became available. It does run, but not very well.
The vertical engine, again my own design, was my reintroduction to model engineering. It was mostly built on a minilathe with a vertical slide for milling. After a lot of fiddling it runs quite well.
The second horizontal engine is an update of the original. It runs quite well and has been capable of delivering 120W from the generator. It's currently being used as a testbed for my mechanical fuel injection system. The first trial was successful in as far as it did run, but needs more detail work.
The 20cc two stoke is intended to be a full diesel with high pressure fuel injection, hence the trials above.