fbpx

 

Considering the 912IS on my sling 2 with constant speed prop. - any folk with experience with this combination - how efficient is this combination and any reliability issues with the 912 IS - trying to decide on whether to fit the sling 2 with the 912 IS with constant speed prop  or 914 UL turbo  with constant speed prop.

Any thoughts on this appreciated. Most of my flying from sea level airports  but some long range trips from high density altitude aiports  ie Density altitudes of approx 7000 ft - typical cruise at FL 095 - best range important

  • Re: Comparing reliability of 912IS with UL series

    by » 4 months ago


    Glenn,

      no experience with a Sling and 912IS. However I have a Sting S4 with a 912IS and constant speed prop. So far about 780 hr with up to 10,000 ft cruise. At 10,000 ft I tend to get about 16-17 l/hr at 100 kt IAS so 120kt TAS.

    Very happy with that as an efficient combination.

     

    Regards

     

    Glenn


    Thank you said by: RotaxOwner Admin

  • Re: Comparing reliability of 912IS with UL series

    by » 4 months ago


    Thankyou, that is very interesting. Really good performance and efficient.. The 914ULS turbo on the Sling 2 is impressive but significant higher price . I am tending towards the 912IS, as it is more fuel  effecient and I like the newer technology and constant speed prop combination. 


  • Re: Comparing reliability of 912IS with UL series

    by » 4 months ago


    So I own and operate a 914 Sling 4. 
    Did my Sling rating on a 914 Sling 2. 
    If it was me, I’d put a CS prop on the Sling 2 and drop in the 914. 

    reason? You’ll get 912 performance with much less engine stress. And the 914 Sling 2 is a BEAST - you’ll never worry about field length again. My gut feel is that the 914 is more reliable although I’d be happy to fly behind either before a conti-lycosaurus. 

    from your username I’m guessing you may be SA based?

    mike 


  • Re: Comparing reliability of 912IS with UL series

    by » 4 months ago


    Hello Mike, yes you are absolutely correct, I am South Africa based. Living in Cape Town. Just signed up for a Sling 2. Need to make the choice of power plant. Fortunately here in South Africa we can fit the constant speed prop. So my options are the 912IS  or 914 UL turbo. The 914 significantly more expensive than the 912 IS. You make a good point in choosing the 924UL turbo. Most of my flying from seal level airports although I plan to do some long range flights and the 912IS gives really impressive range compared to the 914.Iong range tanks would make the 914 a good option but then I would have to add the cost of the long range tanks. Always a difficult decision when having to choose between two very good options such as the 912IS and 914 uls  Turbo 


  • Re: Comparing reliability of 912IS with UL series

    by » 4 months ago


    Mike B. Stated ...

    If it was me, I’d ... drop in the 914.  Reason? You’ll get 912 performance with much less engine stress.

    - - -

    I am not sure I understand the argument.  ???
    The 914 is a Carburetted 80hp UL being pushed to 115hp.  (+43%)
    The 912is is a Fuel Injected 100hp ULS being run at its originally designed100hp. (+0%)

    Running an 80hp engine at any power setting will produce more stress than running a 100hp engine at that same power.

    I also understand that you can safely run the 914 at any power level you wish and still expect it to make TBO because it has been designed to take the EXTRA stresses involved.

    I see the choices as ...
    Carbureted yields lower initial Cost.
    Fuel-injected yield High Reliability.
    Turbo Yields More Power.


    Bill Hertzel
    Rotax 912is
    North Ridgeville, OH, USA
    Bill.Hertzel@Yahoo.com
    Clicking the "Thank You" is Always Appreciated.


You do not have permissions to reply to this topic.