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912 engine 'Blip' just after take-off

in 912 / 914 Technical Questions 11 years ago

  • Re: 912 engine 'Blip' just after take-off

    by » 11 years ago

    Hi John

    Is there any chance it could be carb icing. Do you have carb heat fitted? If so which type?

    Mark
      
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  • Re: 912 engine 'Blip' just after take-off

    by » 11 years ago

    Mark,

    Although the symptoms are like carb icing, I've been advised that it is almost unheard of on the Eurostar. Also, it does a carb heat system (hot water jackets around the carbs), and both carbs are hot when I've checked them after landing. The other thing of course is that carb icing is more likely to happen on cruise revs, but it's always happened to me on full power.
      
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  • Re: 912 engine 'Blip' just after take-off

    by » 11 years ago

    John,

    It's not likely to be carb ice. Those hot water carb heaters do a great job. The lower the RPMs are, the higher the manifold vacuum will be, and the greater the chances for icing.

    I believe I'd try Rogers ideas. Check the plug gap, reduce the prop pitch to gain max RPM at WOT, sync the carbs and see what happens.

    Bill.
    Thank you said by: John Hood
      
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  • Re: 912 engine 'Blip' just after take-off

    by » 11 years ago

    Hi John,

    I'm with Bill. Get all these other items taken care of so they are either out of the equation or they have solved the problem, but they need to be addressed sooner or later and since you are hunting down a ghost problem the sooner is better.

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

    Thank you said by: John Hood
      
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  • Re: 912 engine 'Blip' just after take-off

    by » 11 years ago

    Hi Bob

    It might be worth checking all your plug caps as well.

    I would unscrew all the plug caps and give them a spray with brake cleaner and a blast with an air line.

    Before you screw them back on, snip about 10mm off each cable end to ensure a good connection.

    Mark
    Thank you said by: John Hood
      
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