• Seabee tweaks

    From Angus Mcleod@VERT/ANJO to Digital Man on Tuesday, July 05, 2005 13:00:00
    I just finished tweaking the Seabee to correct the glitches discovered on Saturday. And a few other problems were spotted and corrected.

    1) I realised I hadn't balanced the prop (!) but when I put it in the
    balancer the balance was actually perfect.

    2) The fast-idle problem was caused by the throttle pushrod/arm binding
    on the inside of the cowl. This not only prevented the carburetor
    from closing properly, it prevented it from opening properly too.
    Fixed, so now it should run slower *and*faster* too! :-)

    3) The exhaust pressure-line was touching the edge of the cowl. In only
    one flight, it had almost cut through the line. Ground a curve into
    the cowl to allow the pressure line to avoid contact.

    4) The fuel line to the carb was touching the inside surface of the cowl,
    and had started to abrade slightly. It would have taken much longer,
    but eventually would have perforated. Shortened the line so it didn't
    arch up so much.

    5) Elevator set for level flight required full UP trim. Centered the
    trims and readjusted the elevator at the servo arm and clevis.

    Weather permitting, I'll try her tomorrow.



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    þ Synchronet þ Made of wood and glue, but mostly glue!
  • From Digital Man@VERT to Angus Mcleod on Tuesday, July 05, 2005 11:47:41
    Re: Seabee tweaks
    By: Angus Mcleod to Digital Man on Tue Jul 05 2005 01:00 pm

    3) The exhaust pressure-line was touching the edge of the cowl. In only
    one flight, it had almost cut through the line. Ground a curve into
    the cowl to allow the pressure line to avoid contact.

    4) The fuel line to the carb was touching the inside surface of the cowl,
    and had started to abrade slightly. It would have taken much longer,
    but eventually would have perforated. Shortened the line so it didn't
    arch up so much.

    This cowl sounds like a pain in the arse. Is it just for cosmetics (it does *look* nice) or does it actually serve a purpose?

    Weather permitting, I'll try her tomorrow.

    Good luck with that! :-)

    digital man

    Snapple "Real Fact" #150:
    The first sport to be filmed was boxing in 1894.

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  • From Angus Mcleod@VERT/ANJO to Digital Man on Tuesday, July 05, 2005 17:46:00
    Re: Seabee tweaks
    By: Digital Man to Angus Mcleod on Tue Jul 05 2005 11:47:00

    3) The exhaust pressure-line was touching the edge of the cowl. In only
    one flight, it had almost cut through the line. Ground a curve into
    the cowl to allow the pressure line to avoid contact.

    4) The fuel line to the carb was touching the inside surface of the cowl
    and had started to abrade slightly. It would have taken much longer,
    but eventually would have perforated. Shortened the line so it didn'
    arch up so much.

    This cowl sounds like a pain in the arse. Is it just for cosmetics (it does *look* nice) or does it actually serve a purpose?

    Well, yes, cowls can be a real pain. But they do look nice and they streamline the front of the fuselage. More speeed! :-)

    The problem is that the cowl is not made with any particular engine in
    mind, nor any particular position (front-to-back) of the engine on the
    mount. As a result, you have to cut the cowl to accommodate all the bits
    that unfortunately, stick out. This is almost always a process that has
    to be done in small steps, or you'll ruin the cowl. A new cowl for the
    Seabee costs only $12, but!

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    þ Synchronet þ Made of wood and glue, but mostly glue!