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Old 06-03-2004, 03:16 AM
  #43  
Sow&Steady
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Originally posted by AMGRacer
With a 4 stroke it is a different story. Exhaust valves make all the difference.

See here:



1990

A special high-performance version of the 20cc single cylinder FS-120S four-stroke, this engine has the addition of an O.S. designed Roots type supercharger: the very first time that a genuine supercharger has been fitted to a production model engine. Mr. Giichi Naruke won the 1995 FAI F3A (aerobatics) World Championship using one of these engines.
Amazing!
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