John,
I agree with Dave Watts. First place Id look is the gearbox. Have a good Rotax
tech go through the various checks in the maintenance manual. I bet you need
new Bellville springs. Hopefully, nothing further needs replacing.
Blue skies & tailwinds,
Bob Borger
Europa XS Tri, Rotax 914, Airmaster C/S Prop (75 hrs).
Little Toot Sport Biplane, Lycoming Thunderbolt AEIO-320 EXP
3705 Lynchburg Dr.
Corinth, TX 76208-5331
Cel: 817-992-1117
rlborger@mac.com
On Jul 13, 2015, at 3:29 PM, JohnFrance <77alembert@gmail.com> wrote:
Hi All,
during a recent flight I experienced (propeller!) vibration at the start of the
descent when I reduced power. This was after about two hours in cruise flight.
The frequency was quite high and I could feel a tingling sensation in the feet
in contact with the rudder pedals which makes me think the vibration is coming
---From the propeller/engine combination.
Upon landing I made a close inspection of the propeller and everything seemed
normal
except for some flies and bugs. After cleaning, during the next flight I
experienced the same problem. The vibration is at its worst at 4800 rpm and
reduces
slightly at 5000 but it is still noticeable.
Before I start taking everything to pieces does anyone have an idea what could
cause this sudden change?
Regards,
John
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Europa mono Nr 192
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