I was looking for alternative engines yesterday and stumbled across this.
The site says it has been optimized to run on hydrogen, but can be used by many other types of fuel. What really caught my eye was their 2.1 liter 4
chamber engine. It has been estimated that it would produce 170 kW (around 230 hp, thank you google). This is nothing major except that the complete
engine minus the starter weighs in at a slim 65 kg!! 
There is a lot of cool information regarding their design, offer up thoughts and opinions.
Probably the only downside is the same as with other 2 stroke designs, they are terribly inefficient from a fuel perspective. A lot of fuel is going
to be lost out of the exhaust port as its open as the new air/fuel mix is entering the engine.
Top marks for creativity though.
This is also thinking outside the box:
http://kugelmotor.peraves.ch/index_en.htm
There is an animation video at the bottom of this link
quote:
Originally posted by flak monkey
Probably the only downside is the same as with other 2 stroke designs, they are terribly inefficient from a fuel perspective. A lot of fuel is going to be lost out of the exhaust port as its open as the new air/fuel mix is entering the engine.
Top marks for creativity though.
quote:
Originally posted by beagley
I was looking for alternative engines yesterday and stumbled across this.
The site says it has been optimized to run on hydrogen, but can be used by many other types of fuel. What really caught my eye was their 2.1 liter 4 chamber engine. It has been estimated that it would produce 170 kW (around 230 hp, thank you google). This is nothing major except that the complete engine minus the starter weighs in at a slim 65 kg!!
There is a lot of cool information regarding their design, offer up thoughts and opinions.
Does it run on snake oil?