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Wanted preloved (second hand) Rotax Ring Mount to suit 912ULS.

Must be structurally sound. No distortion or damage that might have negative impact on structural integrity. Can have paint damage/minor abrasion/etc that does not impact on structure.

Prefer to purchase from owner in Australasia, due to currency exchange & freight costs but will consider offers from anywhere.

  • Re: Wanted Rotax Ring Mount

    by » 3 months ago


    Sean, I have the complete engine mount (ring and airframe mount) that came with my 1995 Kitfox Series 5.  Only the 912UL was in production back then, but it appears that the part number for the UL and ULS "engine suspension frame assembly" is the same, so it should fit either engine.  My 912iS came with a ring attached, and I bought a new firewall-forward kit that included a new airframe mount, so I don't need any of it.  I'm happy to split them up if you don't want the Kitfox airframe mount.

    I'm not going to call it "new," as there are some blemishes on the powder coating (gloss black), but it's never been used and there is definitely no structural damage.  I put three photos up on my Google Drive.  As you can see from the photos, it's a slightly different shape than current-production rings.  Also, it has a bracket welded to it whose purpose is a mystery to me.  If you want a better view of anything, let me know and I can post more photos.

    I'm on the west coast of the United States.  If you can't find one closer to you and you're interested in mine, let me know.  There's no rush; I'm not actively trying to sell it so it's not going anywhere.


    Thank you said by: Sean Griffin

  • Re: Wanted Rotax Ring Mount

    by » 3 months ago


    Thanks Eric - that was a very quick response. 

    I will certainly bear your kind offer in mind but will wait & see if there are any closer (to me ) responses.

    FYI - This is for a Sonex Legacy (A). The Sonex provided bottom of engine rail type, Rotax engine bed adapter, for this aircraft, is not what I would call an ideal solution to mounting the engine, having poor control of the 9's significant lateral movement at start/stop.

    Sonex have only recently "recognised" Rotax 9's, for use in their airframe, and have no plans to come up with a more appropriate mount for Legacy aircraft.

    They are considering designing a Ring Mount system for their Sonex B and new High Wing aircraft.

     

     


  • Re: Wanted Rotax Ring Mount

    by » 3 months ago


    Be glad you're using a Rotax, even if it does mean some mounting hassles.  A guy up the street from me recently finished a legacy Sonex that he powered with an AeroVee.  He had nothing but trouble getting it to run right.  I'm not sure if he ever got it dialed completely, but the plane did fly.


  • Re: Wanted Rotax Ring Mount

    by » 3 months ago


    My Sonex Legacy is flying well and its earlier engine overheating issues have been sorted out. The overheating required a complete rethink/installation of the cooling system and an enlarged air scoop on the cowling.

    The one remaining niggeling "fault" is the tendency of the left rear exhaust header, to make contact with the engine frame. Done all the easy "fixes" with considerable improvement BUT not cured.

    The next step is to remake the offending header, so as to achieve a wider space between it and the frame.

    I believe the engine movement issue would have been no issue, if Sonex had supplied a Ring Mount, as in most other aircraft/ Rotax 9 instalatons.

    The Sonex is a "pocket rocket" with the 912ULS and an Airmaster CS prop. Gets off the ground in under 100 m on grass, Climbs at an easy 1500 ft /min and may eventually True at 150 knots WOT (indicates 147 knots). I usually fly at 130 Knots indicated,  for a fuel burn of 15 L/hr


  • Re: Wanted Rotax Ring Mount

    by » one month ago


    Sean,

    Another member just listed unused parts from their project for sale and there is a new ring mount offered. 

    come to the forum classifieds and take a look

    Kurt


    Thank you said by: Sean Griffin

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