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Thread: Hot Rod Sundowner?

  1. #1

    Hot Rod Sundowner?

    Just a little Blue-Skying here....

    Suppose that the Power Flow Systems guys come through with wheel
    pants and the tuned exhaust? And suppose someone bought and
    installed this stuff and did some cleanup on their Sundowner, like:

    * New or overhauled prop. Possibly pitched out a bit to take
    advantage of increased horsepower from the tuned exhaust.
    * Re-rig the aircraft per the manual
    * Remove the ADF, the wire antenna and sense antenna.
    * Remove the windshield OAT probe and install an electronic OAT
    with a tiny unobtrusive sensor

    ....How fast might it go?

    I met an FBO guy at a nearby airport who used to use Sundowners for
    training, back when they were new. He told me that they constantly ran
    them "Pedal to the Metal", and routinely got over 120 knots out of
    them. "Knots, I asked?" "Are you sure that wasn't Miles per Hour?".
    He was adamant that it was Knots.


    - Jerry Kaidor ( jerry@tr2.com )







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  2. #2

    Hot Rod Sundowner?

    >I met an FBO guy at a nearby airport who used to use Sundowners for
    >training, back when they were new. He told me that they constantly ran
    >them "Pedal to the Metal", and routinely got over 120 knots out of
    >them. "Knots, I asked?" "Are you sure that wasn't Miles per Hour?". He
    >was adamant that it was Knots. - Jerry Kaidor ( jerry@tr2.com )

    I'd concur. A clean Sundowner with light load and and aft CG could do 120
    knots at 7500-8500 and full throttle leaned to PEAK RPM (not peak EGT).

    The problem is that most Musketeer series are already nose heavy and
    tankering fuel for a trans-Atlantic flight on their way to the pancake
    breakfast 100 miles away with 2 200# plus pilots in the front seats and no
    baggage.

    Back off the fuel load to the tabs, get a light weight starter, ballast the
    plane for a CG near the aft limit and lose those pounds the wife and the
    AME have been bugging you about, and you may be pleasantly surprised to
    find that your Musketeer is a good bit faster than you thought.

    Aside from the Starter, all these "mods" are free, and they will do more
    for the performance than any other speed mod you can buy.

    Bob Steward, A&P IA
    Birmingham, AL



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  3. #3

    Hot Rod Sundowner?

    Several months ago, I experimented with moving the CG to the aft edge
    of the envelope and found no difference in cruise speed whatsoever. I
    suspect it was my technique that was flawed, but I don't know what I
    was doing wrong. I filled the tanks, made a flight at a given
    altitude in a given direction and recorded the Airspeed indicator.
    Minutes later, I landed, topped off the tanks again, put in the
    maximum number of sandbags my POH would allow then repeated the
    flight. Same indicated airspeed as before.

    --- In musketeermail@yahoogroups.com, Bob Steward <n76lima@...> wrote:
    >
    >
    > >I met an FBO guy at a nearby airport who used to use Sundowners for
    > >training, back when they were new. He told me that they constantly
    ran
    > >them "Pedal to the Metal", and routinely got over 120 knots out of
    > >them. "Knots, I asked?" "Are you sure that wasn't Miles per
    Hour?". He
    > >was adamant that it was Knots. - Jerry Kaidor ( jerry@... )
    >
    > I'd concur. A clean Sundowner with light load and and aft CG could
    do 120
    > knots at 7500-8500 and full throttle leaned to PEAK RPM (not peak EGT).
    >
    > The problem is that most Musketeer series are already nose heavy and
    > tankering fuel for a trans-Atlantic flight on their way to the pancake
    > breakfast 100 miles away with 2 200# plus pilots in the front seats
    and no
    > baggage.
    >
    > Back off the fuel load to the tabs, get a light weight starter,
    ballast the
    > plane for a CG near the aft limit and lose those pounds the wife and
    the
    > AME have been bugging you about, and you may be pleasantly surprised to
    > find that your Musketeer is a good bit faster than you thought.
    >
    > Aside from the Starter, all these "mods" are free, and they will do
    more
    > for the performance than any other speed mod you can buy.
    >
    > Bob Steward, A&P IA
    > Birmingham, AL
    >






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  4. #4

    Hot Rod Sundowner?

    I was playing around with the CG on one trip and had the wife move to the
    back seat at cruise. When I retrimmed to maintain altitude, we were flying
    8 miles an hour faster. It's obvious to me that CG definitely has an
    effect on airspeed.
    Jimmie

    Bob said
    .......... ballast the plane for a CG near the aft limit and lose those
    pounds the wife and the AME have been bugging you about, and you may be
    pleasantly surprised to find that your Musketeer is a good bit faster than
    you thought.




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