Raimo,
My guess it was some propeller imbalance caused by either a stone strike and a
little dent in the propeller or sometime small left on one of the propellers,
insect or bug 'finished off' on a propeller.
If I am only allowed one guess it would be an insect come bug of some type from
Finland.
Cheers,
Tim
Tim Ward
12 Waiwetu Street
Fendalton,
Christchurch, 8052
New Zealand.
ward.t@xtra.co.nz
Ph 64 3 3515166
Mob 0210640221
On 2/10/2011, at 12:38 PM, Kevin Klinefelter <klinefelter.kevin@gmail.com>
wrote:
>
> 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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