Jim,
Thanks for your thoughts. We originally set the prop to 19deg, but
during the first runs the aircraft tacho was recording 5500 - 5600 static
which we thought much too high (we had been told by other Europa owners with
the same spec to aim for 21 deg if not 22.) We reset to 21 deg and got
5100 - 5200 static. Several trains of thought have come to light, we can
only monitor and advise of our findings, however we have an Airmaster which
we will install when we are ready - it will be interesting to see what
happens next. Watch this space.
Tony.
----- Original Message -----
From: "James Nelson" <europajim@juno.com>
Subject: Re: Europa-List: 912S Resonance / Vibration
>
> Tony,
> You might bring the pitch back to 19 deg. and see if it goes
> away. I'm running 19 deg. (with a 912S) and get only 5700 on climb out.
> You may have too much pitch. You might start at 18 deg first and then go
> up in 1 deg. steps. I also have a Mono-
>
> Jim
> N15JN
>
> writes:
> > <tony.bale@virgin.net>
> >
> > Folks,
> > We have just completed the first 2 1/2 hrs of ground
> > engine running (912S Warpdrive @ 21deg XS mono) apart from a couple
> > of starting problems which we think are fuel related, the only issue
> > which we are concerned about is a vibration / resonance at 3200 -
> > 3300 RPM.
> > Could find nothing loose, re-torqued the blades and had a good poke
> > and push around with all the bits and pieces, anyone any ideas /
> > experience ? We have spent considerable effort in reducing throttle
> > cable drag and balancing the carbs.
> > The rev band the resonance occurs at is very specific, and goes as
> > quickly as it starts, very consistent and repeatable, however the
> > engine is smooth at all other speeds.
> >
> > I must say being a spam can pilot I was very impressed (not to
> > mention releaved) at how controllable the aircraft was on the ground
> > in some cross winds and up to high taxi speeds on grass
> >
> > Yours with blurrrrrred vision
> >
> >
> > Tony.
> >
> >
> > PS, I think CKT will be releasing an exhaust mod to prevent the
> > manifold pipe (left rear) cracking some people have experienced.
> > Also they were unaware of the tail pipe falling off some owners have
> > experienced, they are developing a better clamping device.
> >
> >
> >
> > >
> > >
> > >
> > >
> >
> >
> >
> >
> >
>
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