Rotax 550

Discussion in '2-Stroke Aircaft Engines' started by cdlwingnut, Feb 21, 2019.

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  1. Feb 21, 2019 #1

    cdlwingnut

    cdlwingnut

    cdlwingnut

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  2. Feb 21, 2019 #2

    Armilite

    Armilite

    Armilite

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    ================================================

    Yes, the 550F(76mm x 61mm) is a 503(72mm x 61mm) Big Bore. The 550F is Reed Fed Engine vs the 503 Piston Port. USA 550's Engine Case has the Provision 8 Boss's on bottom Case, but not on Top Case. But Yes, you could use a Non Provision Belt Drive.

    There is a 550F made in Russia by RMZ that has a PRO8 Case.
    http://russneg.ru/DVIGATELI-RMZ-pr-va-OAO-RM-i-dvigateli-LIFAN_100g.html

    A 2004 550F with 34mm Carbs Dynoed 70hp@7000rpms! Newer 550's only uses 30mm Carbs and are rated 58hp@6800rpm by Skidoo.

    You can see the Reed Port on the Case. The 503 doesn't have that Small Port.
     

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  3. Feb 21, 2019 #3

    pictsidhe

    pictsidhe

    pictsidhe

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    Finding a reliable redrive is going to be fun. Most who have used belt drives find belt life to be awful. That's a safety issue in an aircraft. The 550s don't have the rotax gearbox mount present, so a gearbox is going to an engineering effort to use. There are Russian clones that do have the gearbox mounts, so you could use at least the russian cases with rotax everything else.
     
  4. Feb 21, 2019 #4

    Armilite

    Armilite

    Armilite

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    While Gear Drives are considered better, Modern Belt Drives are more reliable today than older drives. The Belts just need to be Changed after so many Hours(200+) and People try to use them longer than Manufactures Recomendations.
     

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