I would guess something wrong with one carburator.
Kevin
On 10/1/11, Luc Michaud <rambug@gmail.com> wrote:
> Hi Raimo,
>
> Glad to see all turned for the best.
>
> As for the cause of your vibrations, I'm taking a guess for a leaf that
> wrapped itself onto the leading edge of one of your prop's blades.
>
> I'd say it feels a bit high for it to be at 500' AGL but with a lot of wind,
> in autumn I guess it would be plausible.
>
> Cheers,
>
> Luc
>
>
> On Sat, Oct 1, 2011 at 21:44, Raimo Toivio <raimo.toivio@rwm.fi> wrote:
>
>> All
>>
>> I have hope-so a nice riddle for you.
>>
>> Maybe all the answers are useful lets collect them all:
>>
>> ***
>>
>> Yesterday I took off from *a very* remote /small /windy (90 degrees 12
>> knots and gusting MUCH) grass strip. Soon until well over the ground at
>> altitude +500 feet with full power and 2nd fuel pump still on and gears up
>> I
>> felt suddenly let us say medium or more shake and vibration. My immediate
>> reaction was to go around and land immediately but abandoned because wind
>> was so furious and I felt I cannot do that (a succesful landing).
>>
>> I decided to try to fly to the next possible sensible airfield EFHV which
>> was 10 minutes apart.
>>
>> Those minutes were long: I put my prob (Airmaster CS) to manual and drived
>> it from fine to coarse, tried all the power settings and also a 2nd fuel
>> filter. Finally I noticed that when prop was in a climb mode (in my case
>> 5400 rpm /Rotax 912S) and MAP around 20 inches I got quite a comfortable
>> flying mode and I headed straight home. My airspeed was w that selection
>> about 110 knots but because of a strong headwind GS was only about 70
>> knots
>> (wanted to be clearly over the ground at 3000 ft because it was well over
>> sunset and totally dark, yesterday we got sunset around 1600 Zulutime and
>> time was well over 1630 when flying).
>>
>> So, I pushed home one looooong hour. All the aerodynamics were well. I was
>> a bit worried my engine will separate or so. When trying to push more pwr
>> it
>> was more vibra and when trying to pull less pwr same. I Followed a main
>> highway and decided to land there if feeling so. Cars there with lights
>> are
>> almost like a lighted runway...
>>
>> Finally landing to the EFTP flawlesly.
>>
>> ***
>>
>> Today we had a FHGP (Family Hangar Grill Party). I tried to check my plane
>> as well as I can. I found something. Very small evidence but something
>> anyway. I tried to fix it and had a test run. I elected to go to fly hey
>> I
>> am a test pilot who else and She was better than ever!
>>
>> I managed to do 2 touches and goes when C172 did one with same runway.
>>
>> 140 knots during downwind makes me always happy.
>>
>> ***
>>
>> So dear Ladies and Gentlemen what was wrong?
>>
>> It would be nice and very life-useful to hear your opinions or guesses
>> what
>> was wrong.
>>
>> ***
>>
>> The Rules: one single guess per person, please.
>>
>> The Prize: The Best Guess will get a Very Special Xmas Present from
>> Finland!
>>
>> ***
>>
>> I will let you know a solution after a week be patient.
>>
>> Have a nice weekend and
>>
>>
>>
>> Cheers, Raimo Toivio
>>
>> [image: Europa A2A-ala2OK]
>>
>> Europa XS Mono OH-XRT #417
>>
>> Updated flight hours /landings: 258,3
>>
>> 37500 Lempaala
>> FINLAND
>>
>> p +358-3-3753 777
>> f +358-3-3753 100
>>
>> toivio@fly.to
>> www.rwm.fi****
>>
>>
>
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