I was wondering what the tachometer's RPM measurement is based off of. Since the eccentric shaft turns 3 times as fast as the rotor, are the RPMs derived from the shaft or the rotors them selves?

Here is a great link detailing my question.

http://science.howstuffworks.com/rotary-engine7.htm

 

distributor

 

The CAS 24 tooth *gear*.

http://www.teamfc3s.org/info/articles/demystifying.html

The rpm comes off the NE signal created by the 24 tooth *gear* on the cas shaft.

Also go to the FAQ on this site and download the Training Manual.

 

and the RPMs are measured for the output shaft, not the rotor.

-bill

 

Thanks all to the responses. I am trying to learn something new about my Seven everyday.