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  • Re: Slipper clutch date's

    by » 5 years ago


    Sir: I have a 1999 Rotax 912ULS s/n 4425267 without a slipper clutch.......will a slipper clutch P/N 996-910 work?
    Anything you might tell me in this regard as to slipper clutch types and part numbers for this engine is greatly appreciated
    Pls. reply mbisbing@hotmail.com
    B/R
    Mike

  • Re: Slipper clutch date's

    by » 5 years ago


    yes, and 'wide" clutch part number 996910, 996887 or 996886 will work with your engine.
    Your engine has a 2.43:1 ratio "wide" gearset p/n 886518 (since beginning of 912ULS production)
    The wide gearset has a 7 degree slope to the dogs, so do not use a clutch from a 912 80 Hp or a very early 914UL with "narrow" gear.
    see pdf attached for more details
    widenarrowgearinfo_2019-03-21.pdf (You do not have access to download this file.)

  • Re: Slipper clutch date's

    by » 5 years ago


    Wow, Rob that was quick.....and such authoritative info!!! This is just what I was looking for. A few years ago I bought two new ICP savannah airframes new in the box. I bought two new Rotax 912 engines 100hp one an S and the other a ULS. Since then the first airframe is flying, special airworthiness cert, and on FAA registry as N447VB. It has all the bells and whistles including twin sticks w/stick trim, twin brakes, under fuselage cargo pod, Vg's, gap seals, Czech bubble doors, 283 Kiev prop and a lot of other mods. The aircraft now has 65 flight hours on it and has performed flawlessly even with a whale of an instructor weighing 250 lbs. in the right seat. By myself I lift off at 50 mph indicated in 300 feet and have an 800 fpm rate of climb. With my dear portly instructor I lift off about 50 feet further and get 500 ftm climb. The engine has incredible torque requiring stiff right rudder on lift off to avoid having the aircraft turn over. I am very happy with it. The fuel economy is very good using 91-95 octane autofuel which is not expensive in texas. The second airframe is being set up for CZAW amphib floats so I need a clutch for the ULS. I expect with the floats adding 84 lbs. per side plus the weight of the water rudders, flying wires and support struts (6, three per side) that the aircraft will perform as the first airframe as if i had the instructor in it. I suspect with two people and full fuel and only 100hp the airframe will be a bit doggy and really stress the engine requiring constant high RPM's to stay aloft. Anyway, thanks for the info, really is a life and wallet saver. Well Done!!!!!
    Best regards,
    Mike

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