Virg wrote:

Paul, I thought that the flame front traveled at 750 fps.
Regardless ??? Virg

Paul wrote:

That is in a piston engine. You have a moving combustion chamber in a
rotary.

Russell Kent wrote:

I don't think the moving combustion chamber is a factor.  The flame speed is
referenced to the combustion medium.  By your logic, Paul, a welding torch
has a flame speed of 0.  How can it burn with a flame speed of 0?  It
cannot.  The flame speed is referenced to the speed of the oxygen and
acetylene squirting out of the tip.

Virg,
Flame front propagation speed (aka "flame speed") is a function of the
combustion medium.  The fuel used, the availability of oxygen (%), the
medium's pressure are all factors.  For internal combustion engines, it is a
reasonable approximation to say that the speed is 750 fps.

Russell Kent

Try and find this book used on the Internet guys. 
Rotary Engine Kenichi Yamamoto 1981 version.

Paul Lamar
 
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