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Thread: Kitfox IV Speedster Performance

  1. #1
    fathom's Avatar
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    Oct 2017
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    Default Kitfox IV Speedster Performance

    Greetings all. Just joined the forum and new to the Kitfox community. Have an opportunity to purchase an unstarted Kitfox IV Speedster kit at a hard to refuse price. Before I pull the trigger I’m looking to see what the actual performance specs for it would be for such plane with a 912 engine.

    Does anyone have those on hand? I called the Kitfox office and they said they didn’t have anything available to provide as far as a spec sheet but could answer any questions I might have. Thanks for the help.

    David.

  2. #2

    Join Date
    Oct 2014
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    White Bear Lake, MN
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    Default Re: Kitfox IV Speedster Performance

    I just happened to have the original literature handy
    Attached Images Attached Images

  3. #3
    Senior Member
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    Default Re: Kitfox IV Speedster Performance

    My KF 4 cruises at 115 mph at 5000 rpm.

  4. #4
    Administrator DesertFox4's Avatar
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    Default Re: Kitfox IV Speedster Performance

    Stats from phase one flight tests back in 2003 for my Model 4 Classic with
    The 100 h.p. Rotax ULS and Ivo 3-blade prop.

    Flight stats
    Cruise 115 mph at 5.3 ,gals. per hour
    Cruise 120 mph at 5.7, gals per hour
    Cruise 125 mph at 6.1, gals per hour
    Take off roll average 150 to 200'
    Top speed level flight solo with full fuel no baggage 132 mph, 7.1 gals per hour.
    Stall no flaps 45mph, with 1/2 flaps 42 mph
    Average climb rate 90 degree day 1200 to 1300 fpm.
    Service ceiling not found yet. Highest flight 12,500' so far.
    Empty weight 661 lbs


    DesertFox4
    Admin.
    7 Super Sport
    912 ULS Tri-gear


  5. #5
    fathom's Avatar
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    Default Re: Kitfox IV Speedster Performance

    Perfect. Thank you all for the input.

    Were there any design changes between the Denny Kitfox IV-1200 and the Classic IV from SkyStar? My research leads me to think there isn’t but would love to hear the input from the owners and builders. Thanks.

    Dave

  6. #6
    Administrator DesertFox4's Avatar
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    Default Re: Kitfox IV Speedster Performance

    My Classic 4 from SkyStar had the nose gear and tail wheel mounts and also the larger elevator.


    DesertFox4
    Admin.
    7 Super Sport
    912 ULS Tri-gear


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