MRE-FB wrote:
     >
     > You wrote:
     >
     > "BTW Francois most people use four injectors on the rotary and stage
     > them.
     > In other words only two are used at low power for good mixture control
     > and all four are used at high power. Tracy Crook at
     > http://www.rotaryaviationcom/
     > builds an EFI/IGN computer with dual redundant processors that achieves
     > this configuration."
     >
     > We also use 4 injectors and also have redundant processors.  However,
     > contrary to Tracy's ECU, each one of our boards (we call them CIANs for
     > Numerical Injection and Ignition Controllers... in French) runs one
     > injector on each rotor.  This way, should we lose a CIAN on take-off,
     > the engine hardly notices and keeps its rated 220 t/o HP.  That is, if
     > we can feed it enough fuel on only 2 injectors  With the biggest Bosch
     > injectors, we achieve a bit over 180 HP on 2 injectors... good but not
     > good enough.  So we need bigger injectors.  I know Siemens and Delphi
     > make bigger injectors for car (dragsters?) racing, but I'd like to know
     > if someone has experience with them at less than full bore!
     >
     > Thanks for the help.
     >
     > Francois

Tracy Crook wrote:

     Interesting.  How does one CIAN know that the other has failed?

     Tracy

 
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