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Airbox Questions

in General Tech Discussion 8 years ago
I have looked at about 8 or 10 Just Highlanders and Superstols with Rotax 912. None of them use the Rotax airbox. I would like to hear various opinions on the value of using the airbox versus not using it.

  • Re: Airbox Questions

    by » 8 years ago

    Some aircraft have individual air filters, some a angle large filter connected to both. Whatever you do you don't want to have any restricted airflow. The Rotax air box is designed for that engine and setup to have the carb vent tubes incorporated along with carb heat.

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

    Thank you said by: Ken Ryan
      
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  • Re: Airbox Questions

    by » 8 years ago

    The airbox has many advantages:
    Carb heat
    Ideal connection point for vent hose
    Stabilizes carbs, prevents frothing of fuel at start up.
    Drip trays
    Equalizes airflow (it is not just a piece of irrigation pipe, it has been engineered to improve the airflow and fuel distribution to the cylinders)
    Thank you said by: Ken Ryan
      
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  • Re: Airbox Questions

    by » 8 years ago

    Thanks Roger and Rob. Does the airbox make it easy to provide for carb heat? Is it just a matter of running a cable? Does it have a single air inlet? I've read that using it adds 5 horsepower (compared to using warm engine compartment air). Is that accurate?
      
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  • Re: Airbox Questions

    by » 8 years ago

    You need a cable and a heatmuff on your exhaust so its not always simple.
    It can improve horsepower but that would depend in the installation, like you say, how hot is the under cowl air?
      
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