Dave,
What is your web site address please???
Reg
Tony Renshaw
Sydney Australia
> DJA727@aol.com <DJA727@aol.com> wrote:
>
>
> To those who were following my engine problem during run up - I have
> solved
> it.
>
> The problem seemed to progress to the point of complete frustration.
> I
> finally got the run up to be acceptable in terms of RPM drop and flew
> it again. I
> climbed to 10,000 feet and did a mag check on the way up -- all OK. I
> then
> pulled the power back and the airplane began to run rough -- on both
> mag together.
> Changing to one mag, caused pooping noises and very bad running. That
> was on
> both mags one at a time. The neat things was that in the long wing
> airplane,
> this engine problem was not a big deal as the airplane outclimbs its
> own glide
> ration at about 2 1/2 to one and I was sitting in a perfect position
> to return
> to the field as a glider. I have done that once already on purpose.
>
> On the ground, the Rotax expert said it sounds like the fuel pressure
>
> regulator. The first thing to check is the hoses. I did just that and
> found an
> obvious slit in the little air hose that attaches to the airbox.
> Fixing that and
> rebalancing the carbs has resulted in a very smooth running engine --
> even
> smoother than is has ever run. I plan to put the picture of this
> problem on my web
> site later.
>
> On a side note, I have designed an equation to display the fuel
> pressure as
> it changes with manifold pressure to make an easy way to tell if the
> fuel
> system pressure is varying correctly with manifold pressure. It
> wasn't displaying
> correctly and I just thought my design must have had a problem. It
> didn't. One
> simple fix and the engine is back to normal -- purring like a kitten.
> I will
> be changing the material those little hoses are made of as soon as I
> can figure
> the best material to use. Keep an eye on those hoses.
>
> Back in the air,
>
> Dave
> A227
> mini U2
>
>
>
>
>
>
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