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Old 06-23-2011, 02:15 PM
42blue15 42blue15 is offline
Motorized Bicycle Elite Member
Join Date: Sep 2008
Location: St Louis metro, USA
Posts: 135
Default Re: A mini rotary engine for a bike?

Originally Posted by Fulltimer View Post
The Sachs 303 has 303cc and 19hp. If someone put that on a bike they would have to have a pilots license! It would have a decidedly cool factor though!!

Well,,,, putting a huge engine on a bicycle isn't a totally idiotic idea, if you use an intake restrictor plate. And you might need a hefty flywheel on there to smooth out the engine, since it's going to spend a lot of time puttering on its lower-end.

The benefit is that you still get most of the engine's low-end torque.

The drawback is the bigger engine's weight.
The 35cc Robin/Subaru 4-stroke I had was about 8.5 lbs.
A Briggs & Stratton Vanguard v-twin (16 hp normally) weighs about 75 lbs,,, + the flywheel you added....
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