fbpx

 

Hi,
1. I am after an indicator diagram for a Rotax 582, i.e. torque versus crank angle. Does anyone know where one might be, (I've tried the factory to no avail)? Failing this, does anyone know where I could get a representative indicator diagram for a twin cylinder two stroke, or even a single cylinder engine?
2. I want to put an rpm limiter into the ignition circuit on a Rotax 582, i.e. so the sparks dies if rpm goes beyond 6800. Does anyone have any knowledge of how to do this?
Regards
Mark
  • Re: indicator diagram & rpm limit

    by » 8 years ago


    Y

  • Re: indicator diagram & rpm limit

    by » 8 years ago


    Hi Nick
    1. Thanks for your reply. Where can I get an indicator diagram for a Rotax 582, or representative engine?
    2. Regarding the rpm limit I am going to build an Arduino unit to go between the ignition unit and the plug. This'll give me a very quick way of stopping the unit should the load disappear.
    Regards
    Mark

  • Re: indicator diagram & rpm limit

    by » 8 years ago


    Hi, sorry, I misinterpreted your Y reply. The reason i want an indicator diagram is so that I know the maximum peak torque coming out of the crankshaft. This will allow me to size other drive train components. Regards Mark

  • Re: indicator diagram & rpm limit

    by » 8 years ago


    Mark: 582 torque peaks just over 6000 rpm. These values are available on this site in the information section.
    Dennis

  • Re: indicator diagram & rpm limit

    by » 8 years ago


    He is looking for Instantaneous Torque vs Crank Angle, not average Torque vs Rpm.

    A quick Google search of "Engine Torque vs Crank Angle" shows the peak torque is 300-400% of the average torque, depending on the engine.
    ----------------------

    I would be hesitant in installing anything that has the capability of disabling the ignition in an aircraft.
    Even Rotax allows "Military Power" (105% Max RPM) for a few seconds.
    A High RPM alarm, Sound and Lights, Might serve the same purpose.
    If you exceed Max RPMs in a dive the alarm would remind you to back off the throttle.

    A throttle servo that could be manually overridden would be another option.
    I would hate to see the ignition be disabled in flight due to a failure in the safety circuit.

    K.I.S.S. !!! Murphy is a patient man!

    Bill Hertzel
    Rotax 912is
    North Ridgeville, OH, USA
    Clicking the "Thank You" is Always Appreciated by Everyone.


You do not have permissions to reply to this topic.