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Heavy In-flight Vibration Riddle
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raimo.toivio(at)rwm.fi
Guest

Posted: Tue Oct 04, 2011 10:21 am Post subject: Heavy In-flight Vibration Riddle

Dear Hannah (your name is beautiful, may I ask how old ... oh...do you have  any flying lisence?)

  

 ***

  

 No it was not. The strip was very short (w wet long grass) and a sidewind  was at uncomfortable level. I triplechecked everything before takeoff run:

  

 1) prop T.O. & auto

 2) 2nd fuel pump on

 3) both mags on

 4) trim there where I like it to be with that configuration and load and  selected “stick” and “fast trim”

 5) doors locked and pip-pinned

 6) loose items secured

 7) free controls

  necessary lights on

 9) xpdr on

 10) TCAS on

 11) no red lights

 12) runway seems to be free

  

 During acceleration:

  

 1) engine revs at or near 5800 rpm

 2) ASI is alive

  

 During my CS-prop test flight period I tried couple of times what happens  when I do so (leave it on manual during take-off with full power).

 Both times the departure run was quick and engine rpms were after rotating  around 6500 rpm.

 Second time I tried it until at 1000 ft QFE.

 Rotax was singing smooth and no noticeable problems at all.

  

 I have heard a gossip that Rotax factory accepts this is  ok for “ a moment “ but of course they will not publish it.

 Do not take this very seriously or literally or at all.

 Anyway, I would be not so worried about overrevs with Rotax (912S).

  

  

  

 Raimo OH-XRT Finland

  

  

  

  

  

  

  

  

    

  From: Tim Ward (ward.t(at)xtra.co.nz) 

 Sent: Monday, October 03, 2011 10:49 PM

 To: europa-list(at)matronics.com (europa-list(at)matronics.com) 

 Subject: Re: Heavy In-flight Vibration  Riddle

  



    Hi Raimo,

 Yes I am Tim’s daughter, Hannah, and my second guess is;

 Was the Airmaster Auto/Man switch left on Man for the Take-off?

 Cheers,

 Hannah

  

 Tim  Ward,

12 Waiwetu Street,

Fendalton,

Christchurch 8052

New  Zealand



Ph; 03 3515166

Mob; 0210640221



email;  ward.t(at)xtra.co.nz



    

  From: Raimo Toivio (raimo.toivio(at)rwm.fi) 

 Sent: Tuesday, October 04, 2011 2:58 AM

 To: europa-list(at)matronics.com (europa-list(at)matronics.com) 

 Subject: Re: Heavy In-flight Vibration  Riddle

  



    Hanna,

  

 are you sure you are Hanna or in fact Tim, Hanna´s dad (who is going to try  to win desperately the shipment from Finland) ? 

  

 If you really are Hanna; you may try 2nd time, because you are a pilot´s  daughter.

  

 Please read my first mail once again carefully: I wrote

  

 “Soon until well over the ground at altitude +500 feet with full  power and 2nd fuel pump still on ... “

  

 Notice also, these words below are really essential info, something  maybe to do with prop/pwr –settings:

  

 “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.  “

  

 ***

  

 All,

  

  

 One of you is now really close, physically say 50 mm /2" inches.

  

  

  

 Cheers, Raimo OH-XRT Finland 

  

  

  

  

  

    

  From: Tim Ward (ward.t(at)xtra.co.nz) 

 Sent: Sunday, October 02, 2011 9:39 PM

 To: europa-list(at)matronics.com (europa-list(at)matronics.com) 

 Subject: Re: Heavy In-flight Vibration  Riddle

  



  Raimo,

 Two thoughts.

 

Fuel starvation with the fuel pumps not turned on for take off?

  

 Cheers,

  

 Hannah 

  

 Tim daughter

Tim Ward  12 Waiwetu Street

 Fendalton,

 Christchurch,  8052

 New Zealand.

  

 ward.t(at)xtra.co.nz (ward.t(at)xtra.co.nz)

  

 Ph 64 3 3515166

 Mob 0210640221

  



 

On 3/10/2011, at 4:58 AM, "Raimo Toivio" <raimo.toivio(at)rwm.fi (raimo.toivio(at)rwm.fi)>  wrote:

 

 [quote]            All

    

   I have got plenty of good guesses via list and also direct.

   Some of you have hoped I will not publish them with their names and do    not worry I wont´t.

    

   Graham – I /we got an empty message from you – please retype it – I am    sure it will be a good info.

    

   One of you have guessed the problem was because a broken de-icing rubber    in the prop blade. That´s good but unfortunately my Europa is so far still    missing de-icing systems totally. They would be soon very useful in    Finland.

    

   ***

    

   No one has so far found a reason for my vibra.

    

   So there are still a possibility to get an Xmas packet from  Finland.

   I quarantee the shipment will be worth of making a good guess.

    

   ***

   Tips: 

    

   - the reason was off /on or black /white –type and very easy to repair;    it was fixed in seconds. 

   - when finally found it was not invisible at all. 

    

   Go On!

    

   Cheers, Raimo OH-XRT

    

    

       

          

      From: Raimo Toivio (raimo.toivio(at)rwm.fi) 

   Sent: Saturday, October 01, 2011 10:44 PM

   To: [url=mailto:europa-list(at)matronics.com]europa-list(at)matronics.com (europa-list(at)matronics.com)[/url]    

   Subject: Heavy In-flight Vibration    Riddle

    



            All

    

   I have hope-so a nice riddle for you. 

    

   Maybe all the answers are useful – let´s 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



<Europa%20A2A-ala2OK[1].png>   

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(at)fly.to (toivio(at)fly.to)

www.rwm.fi



   





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Justin(at)systemwise.co.u
Guest

Posted: Wed Oct 05, 2011 2:52 am Post subject: Heavy In-flight Vibration Riddle

My daughter  says that the little tube from carburettor to plenum chamber has disconnected on one side.

 

Justin

 

G-ZTED Classic Monowheel.

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budyerly(at)msn.com
Guest

Posted: Wed Oct 05, 2011 10:18 am Post subject: Heavy In-flight Vibration Riddle

<?xml:namespace prefix="v" /><?xml:namespace prefix="o" /><![endif]-->  Many things to check.

  Carbs:

 Check for a vacuum leak or a carb intake or carb to manifold leak.   Especially since it seems to have just started and abates at low power  setting.

 Check carb balance.



  

 Engine Electrics:

 First check ignition A and B separate.

 Second check plugs, check coil. (one bad coil really shakes also)

 Pull plugs and look for differences.

  

 Fuel :

  Check carb float bowls for dirt.

 Check fuel pressure regulator for 914

 Finally your fuel pump delivery pressure.

  

 Exhaust:

 Check no exhaust failure.  Look at the entire exhaust for soot,  looseness or failures.

  

 Regards,

 Bud

  



  

 [quote]   ---

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