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long slow process, the Autoflight 700

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  • uniflow
    started a topic long slow process, the Autoflight 700

    long slow process, the Autoflight 700

    Test flying the Autoflight 700 twin,
    And it's me testing it. Runs smooth (internal balance shaft) and powerful (80HP) with the internal gear reduction proving robust so far. Still single ignition for the moment and runnimg carburetors. I've got a second engine here that will be set up with TPI injection and burning E85.
    https://youtu.be/8pS4KhsTtoo

    https://youtu.be/8IA3Xth6jXc
    Last edited by uniflow; 06-11-2018, 03:35 PM.

  • uniflow
    replied
    https://youtu.be/sm8Y0XWEpIU

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  • uniflow
    replied
    another two hours today, Starting to relax and feel quite confident on an out landing now if needed. Did my first cross country ( over size circuit😆)
    Might have some video on line soon.

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  • uniflow
    replied
    two and a half more hours, still just circuits but plenty of fun.
    This engine was never supposed to fly, ground run only but its going so well, why not do circuits. Have been careful to run it up to only 6000 rpm, flys nice at that. This weekend I turned it up to 6800, what a difference, it sparkles. Should be good for 7500 all up. But we won't be going there yet.

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  • Vance
    replied
    Thank you for sharing the fun Neil! I love progress.

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  • uniflow
    replied
    another hour and a half today, landings are getting better.

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  • uniflow
    replied
    Purchaced another four litres of twostroke oil, optimistic?
    Perhaps, but I hope not, off to run the gyro again this weekend. More tight circuit's.

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  • Cresco750
    replied
    Originally posted by uniflow View Post
    cresco 750, you from PAC, Hamilton?
    No, but I used to fly them a number of years ago. Auckland these days.

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  • uniflow
    replied
    cresco 750, you from PAC, Hamilton?
    Last edited by uniflow; 07-17-2018, 12:47 PM.

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  • uniflow
    replied
    Obviously for the moment it has to be just a one off ( or two or three off) but eventually I would like to do a production run. I'm sorting production tooling for the cylinders now and a production sand molding machine.
    I have all the CNC machining sorted, cranks cases etc and I have a gear hobbing machine ready for production runs.
    BUT I want more time on this one first and perhaps a second engine ( I have a second complete engine minus the cylinders, thats what I'm trying to sort at the moment).
    And I have a third engine unmachined, also missing cylinders.
    I must say I'm enjoying the test flying, a little nervously at times as I'm only low hours, not that much more than the engine. Every landing is a practice engine out. All flying is close circuits and the airstrip is long and wide.

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  • Cresco750
    replied
    Very cool. I love the safety ‘Stubbies’! What’s your ultimate goal for this engine, Neil; do you hope to put it in production or is it one-off for your own use?

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  • uniflow
    replied
    and anothet hour this weekend.
    These are tha actual cylinders running on the gyro. Cast in the back yard in LM13 alloy, nikasil plated.
    https://youtu.be/UdSw3QbZtKE

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  • uniflow
    replied
    Gave it another half an hour today. I like flying my Dominator. Perhaps time to build up my second engine, you know, just in case😆.

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  • uniflow
    replied
    the female cone is connected to the end of the balance shaft, spinning all the time. The male half is connected to the angle drive, angle drive is able to slide in and out via a lever and cable, operated by the pilot.
    Pilot uses a clutch handle ( like most gyros) to engage the cones. Some slippage is nessasary for a start but not for long then one to one drive. Works well.

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  • Kevin_Richey
    replied
    Is the cone raised up by the pilot to engage the prerotator? Varying the cone nestling inside another cone to slowly bring the rotors up to speed?

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