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Content tagged 'vibration'

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  1. Hello, 
    Just installed a new shiny and beautifully crafted NR Propeller on a Kitfox 4-1200 powered by a Rotax 912 UL. It replaced a 72” 3 blade tapered Warp Drive. There has always been even with the WDP a bit of vibration on full idle especially at short final with the engine completely unloaded and the “wind milling” Propeller apparently driving (leading?) the engine. Now this has been drastically aggravated with the 2 blade NR. 
    Is anybody out there experiencing the same thing or a similar issue at final approach at full idle? The vibrations seem to increase proportionally with airspeed at full idle rpm. No issues once you add  a little power and load up the prop and engine. 
  2. I wasn't sure which forum thread to put this in but since it all seems engine related here it is.
    So, what IS and what ISN'T normal vibration for a 582?
    I'm getting vibs between 3200  -- 5200 rpm. 
    At t/o power all is well and smooth -- engine runs right up to 6400 -- throttle her back to 5800 or 6 and climb out.  Rolling downwind pull her back to 5200 a disconcerting feel in my seat and sound "bump", nother second or 2 *bump*;  that I can feel and hear how I best can describe it.   Mixture? --  Lean or rich (because of improper fuel/oil ratio)?  I'm running the injector and Rotax Rick wants me to add an extra 3.2 ounces per 5 gals to ensure adequate main bearing lube as he puts it.
    Pull back to around 4k and let the nose down to base leg; now I'm getting a tingling in the foot pedals.   Rolling on to base, 3500 rpm and my feet are tingling and the plane is vibrating.
    Is this normal?
    The other factor is the IVO prop.  I hear they can be rough.  I'm thinking I've got 2 distinct problems going on. One ea with the prop and the engine.
    Today at warmup. I did take notice on the ground the vibration is definitely beginning at 3500.
    All you folks running IVO IFA please chime in.
    Thanks.