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McFarlane Throttle springs

in General Tech Discussion 8 years ago

  • Re: McFarlane Throttle springs

    by » 8 years ago

    Hi Rob,

    :woohoo: :lol: :lol:

    Okay can you boil that down a little for me. :cheer:

    Kind of confusing since they only want 5500 at max continuous power. I'm not sure I see where they talk about the 5500-5800 rpm range for any long time testing?


    So what's your personal slant in an emergency running over the 5500 and maybe up to 5700 rpm for lets say 10-30 minutes?
    This means landing in the trees or Mnts. vs or landing in a more convenient spot and what do you think would happen to the engine?

    Roger Lee
    LSRM-A & Rotax Instructor & Rotax IRC
    Tucson, AZ Ryan Airfield (KRYN)
    520-349-7056 Cell

      
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  • Re: McFarlane Throttle springs

    by » 8 years ago

    boiled down: 30 hours alternating between 5 min full throttle 5800 with 5 min 5500 full throttle.
    I think it can handle a few extra minutes at 5800....
      
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  • Re: McFarlane Throttle springs

    by » 8 years ago

    Thanks Rob. Hope things are going well. Are you headed or at Oshkosh?



    That was what I was hoping for and have told people in the past. Safety first and if your ground adjustable prop is setup to get around 5600-5650 all the better.

    Roger Lee
    LSRM-A & Rotax Instructor & Rotax IRC
    Tucson, AZ Ryan Airfield (KRYN)
    520-349-7056 Cell

      
    Report

  • Re: McFarlane Throttle springs

    by » 8 years ago

    I just had a McFarland spring fail, one thing that was apparent was that even though the aircraft had been stored inside a warm garage all winter the spring had significant rust. I love the throttle now that I have replaced the old throttle cable with the McFarland mod. My fix was to increase inspection of the springs and to spray them with ACV...I presume LPS#3 would work just as well. McFarland asked that I send the springs back...I did with a request to notify me of any improvements in their design.
    Mike in Alaska
      
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  • Re: McFarlane Throttle springs

    by » 7 years ago

    As the original throttle of my FK14B is a bit sensitive at low RPM (taxiing, landing,..) e.i. very small throttle movements have a large effect on altitude. Therefore I would like to replace it by a Vernier assist McFarlane throttle. However I am a bit reluctant in view of the many reports about failure of the (lighter) springs.
    What is the actual situation now?
    Jan in The Netherlands
      
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