A Swedish engineer has designed out the normal four stroke valves with springs etc and inserted the well tried 2 stroke types instead. Not to convert an engine from one to the other but strange how long the idea has been to make the jump . I think reed valves is the type he uses .
The (John ) Elwood 1300cc and Elwood 500cc are the 2 machines mentioned . The designer is a one off racer /engineer . I wonder if Alan would be interested . The intake gases are compressed and held ready for the next stroke. Also used is a cross head rotary valve . If anyone knows about that please help us with it . The big one produces the thick end of 150 horses at about 7,000 revs . An Australian interviewer chats with John about his bike and the prototype is started up at the end . It has no gearbox!!! The single piston is huge . The cylinder head is a thing of beauty .
The (John ) Elwood 1300cc and Elwood 500cc are the 2 machines mentioned . The designer is a one off racer /engineer . I wonder if Alan would be interested . The intake gases are compressed and held ready for the next stroke. Also used is a cross head rotary valve . If anyone knows about that please help us with it . The big one produces the thick end of 150 horses at about 7,000 revs . An Australian interviewer chats with John about his bike and the prototype is started up at the end . It has no gearbox!!! The single piston is huge . The cylinder head is a thing of beauty .
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