Unusual Engines
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This site is dedicated to the engines that you'll never read about in the standard textbooks.  The promising ideas that didn't make it commercially, yet have technical merit over what we are all using today.

This site is also about some of the lies that average consumers are unwittingly buying in to.

My apologies in advance if segments of the site are down.  I went for high resolution in the graphics.  Great, but the site was done on a budget and I only have so much data transfer per month, leading to the site getting turned off for a few days every month.  If you think you'll be back, it may be worthwhile saving the images rather than reopening pages several times.  It'll save your modem bills and keep the site up for others.

Finally, I have included a few of my own ideas (engines and otherwise) for public use.  I want to see them built, so if you like the look of something, go for it!
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Aspin Rotary Valve 4-Stroke
Cross Rotary Valve 4-Stroke
Frode Rotary Valve 4-Stroke
Poppet Valve Properties
Mechanically Closed Poppet Valves (desmo systems)
Sleeve Valve Engines
What the fuel companies aren't telling you
The inventor's path to failure
The Miller cycle
Tesla's flat-disc boundary layer turbine
Sarich's orbital rotary engine
Impulse Turbines