Mark Steitle wrote:

Quoting Paul Yaw's web article on Combustion and Ignition -Part

One

(http://personal.riverusers.com/~yawpower/techindx.html) he

states, "In the

real world we do not have this option because the fuel does not

burn fast

enough to complete the combustion process within such a narrow

range. ...you

will realize that the power output of the engine can be increased

by

increasing flame speed.  Increasing the flame speed will release

the energy

from the fuel in a shorter period of time.  This will allow more

effective

use of this energy by timing the combustion process to more

closely match

the torque transfer curve of the rotor/eccentric shaft

combination."  If it

really is beneficial to increase the flame speed, then wouldn't

firing both

plugs at the same time help to accomplish this, resulting in more

power at

the flywheel?

End of quote.

Al Gietzen wrote:

My understanding is that propagation speed of the flame front has

to do with

mixture, compression ratio, fuel volitily, etc., and would not be

affected

by whether you fired one plug or two.  Paul  has told me that

firing both

leading and trailing at the same time will reduce effective "power

range",

but will make little or no difference in the power at the RPM we

run our

engines in an airplane.

Al

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

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

Paul Lamar
 
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