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912ULS fuel starvation in steep turns

in General Tech Discussion 9 years ago

  • Re: 912ULS fuel starvation in steep turns

    by » 9 years ago

    The restrictor I have is a Rotax-supplied part that fits into the nipple that screws onto the clamp block (Part 17 in the drawing, P/N 840737).

    The hole in a 0.65mm restrictor is nearly 3.5 times the area than a 0.35mm hole. I wouldn't do it. On what end of the hose you fit it would make a tiny (negligible) difference, flow-dynamic wise. I see that someone used a Rotax pilot jet screwed into a fuel nipple (http://www.rotax-owner.com/en/rotax-forum/3-4-stroke-technical-questions/1775-new-fuel-pump?start=40).
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  • Re: 912ULS fuel starvation in steep turns

    by » 9 years ago

    Hi Arthur,

    It is supposed to be a Mikuni 35 idle jet. It is possible someone used the wrong jet.

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

      
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  • Re: 912ULS fuel starvation in steep turns

    by » 9 years ago

    Arthur, Roger,

    Thanks for your replies. I got myself confused because someone told me not to forget to install the restrictor in the fuel return and (not knowing much) figured that meant I had to buy one and install it somehow. However, after talking to a Rotax parts person and seeing your replies I see that (being brand new) the part is already inside the banjo bolt (indeed, you can only both together as an official part) and I have no need to look for one.

    Cheers

    Paul
      
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  • Re: 912ULS fuel starvation in steep turns

    by » 3 years ago

    Arthur Gotz . . . Thank you in advance for answering . . . if you can and if you received this request.

    I am having a CGS Hawk II custom built with a Rotax 912UL.  Did you have your CGS Hawk built or did you kit build it?

    What I do not know at this time is if my plane is the first CGS Hawk II being factory built with the Rotax 912 UL?  

    The company has changed hands recently and I am having difficulty getting an answer to my question from the new owner.

    Thank you again for your time.  mike.housewert@gmail.com

      
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