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Aileron Trim - Vibration in Struts - Fuel Odour

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genie(at)swissmail.org
Guest

Posted: Sat Jul 26, 2014 12:07 pm Post subject: Aileron Trim - Vibration in Struts - Fuel Odour

Here are three (apparently) unrelated issues with my RV-6:

     

     Aileron trim: 

     

     When I move the ailerons then the trim lever between the seats     follows them. I have not noticed that before. From what I remember     the trim lever remained in position and could be moved only by hand     to adjust the ailerons. Is it normal for the trim lever to move with     the ailerons? If not, is the aircraft airworthy if it does and what     can be done to prevent this from happening?

     

     Squeak and vibrations from wheel struts:

     

     When I push my aircraft on the ground everything goes well. But when     I stop I hear some squeaky sounds. Upon closer inspection vibrations     emanate from the wheel struts. This happens also when I rock the     aircraft or when I pull it backwards. I removed the wheel covers and     pumped up the tyres. This did not have much effect. I can feel the     vibration on the pants of the struts. What could the problem be and     what can be done to remedy it? Does it have anything to do with the     brake lines?

     

     Slight odour of fuel in cockpit:

     

     When I open the cockpit by sliding the canopy I think that I can     smell slightly fuel. I have not noticed any leak or loss of fuel.     After leaving the cockpit open for a few minutes this disappears. I     have noticed this for the past few months. Is there anything I can     do to locate the source of the odour? I suppose that there are a few     vapours.

     

     Thanks for answering any one of the above questions (or any     combination).

     

     George Nielsen

     RV-6 PH-XGN

     The Hague, the Netherlands

      [quote][b]

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Doug Gray

Joined: 10 Jan 2006
Posts: 112
Location: Sydney, Australia

Posted: Sat Jul 26, 2014 3:06 pm Post subject: Aileron Trim - Vibration in Struts - Fuel Odour

1. The friction on the aileron trim lever set and adjusted by a nylon split block underneath the seat panel. Remove the lever handle and the seat floors then nip to nylon lock nut up a little to increase the friction.  Airworthy with or without aileron trim.

2. First check the tension/torque on all 6 engine mount to firewall bolts. If these are loose the mount can move relative to the firewall giving the creaking sound. Second, check for cracks in the engine mount at the various welded areas, these don't creek but it would be wise to check them.

3. If you are using 100LL fuel and is dyed blue like this country (Australia) look for a residual blue stain around the fittings inside the cockpit. It will transfer to your fingers easily so you can simply feel around the plumbing.  The blue dye is left behind after the fuel evaporates.

Doug



Sent from my iPad



On 27 Jul 2014, at 6:06 am, George Nielsen <genie(at)swissmail.org (genie(at)swissmail.org)> wrote:

[quote]                    Here are three (apparently) unrelated issues with my RV-6:

     

     Aileron trim: 

     

     When I move the ailerons then the trim lever between the seats     follows them. I have not noticed that before. From what I remember     the trim lever remained in position and could be moved only by hand     to adjust the ailerons. Is it normal for the trim lever to move with     the ailerons? If not, is the aircraft airworthy if it does and what     can be done to prevent this from happening?

     

     Squeak and vibrations from wheel struts:

     

     When I push my aircraft on the ground everything goes well. But when     I stop I hear some squeaky sounds. Upon closer inspection vibrations     emanate from the wheel struts. This happens also when I rock the     aircraft or when I pull it backwards. I removed the wheel covers and     pumped up the tyres. This did not have much effect. I can feel the     vibration on the pants of the struts. What could the problem be and     what can be done to remedy it? Does it have anything to do with the     brake lines?

     

     Slight odour of fuel in cockpit:

     

     When I open the cockpit by sliding the canopy I think that I can     smell slightly fuel. I have not noticed any leak or loss of fuel.     After leaving the cockpit open for a few minutes this disappears. I     have noticed this for the past few months. Is there anything I can     do to locate the source of the odour? I suppose that there are a few     vapours.

     

     Thanks for answering any one of the above questions (or any     combination).

     

     George Nielsen

     RV-6 PH-XGN

     The Hague, the Netherlands

       	  Quote: 	
		  



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[b]

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ceengland7(at)gmail.com
Guest

Posted: Sat Jul 26, 2014 3:58 pm Post subject: Aileron Trim - Vibration in Struts - Fuel Odour

Also worth checking:

       

       2. If the mount is tight and there are no cracks, jack it up so       that there's no load on the gear leg, & make sure it's not       moving in its socket in the motor mount. Not likely, but worth       checking. Also, the brakes can sometimes squeak, or drag a bit       causing the brake line or leg fairing to vibrate as the plane is       moved; might not be noticed until the plane comes to a stop and/or       is rocked forward/aft to just rotate the wheels slightly.

       

       3. If there's *any* leak at all at the tanks or anywhere else back       of the firewall, the odor will find its way into the cabin. It       might not even be bad enough (or be in a location you can't easily       inspect) to see evidence of a leak. Because the canopy traps air       in the cabin, natural air movements have a hard time dispersing       the odors.

       

       Charlie

       

       On 7/26/2014 6:06 PM, Doug Gray wrote:

     

     [quote]              1. The friction on the aileron trim lever set and adjusted by         a nylon split block underneath the seat panel. Remove the lever         handle and the seat floors then nip to nylon lock nut up a         little to increase the friction.  Airworthy with or without         aileron trim.

       2. First check the tension/torque on all 6 engine mount to         firewall bolts. If these are loose the mount can move relative         to the firewall giving the creaking sound. Second, check for         cracks in the engine mount at the various welded areas, these         don't creek but it would be wise to check them.

       3. If you are using 100LL fuel and is dyed blue like this         country (Australia) look for a residual blue stain around the         fittings inside the cockpit. It will transfer to your fingers         easily so you can simply feel around the plumbing.  The blue dye         is left behind after the fuel evaporates.

       Doug

         

         Sent from my iPad

       

         On 27 Jul 2014, at 6:06 am, George Nielsen <genie(at)swissmail.org (genie(at)swissmail.org)>         wrote:

         

       

        	  Quote: 	
		                                 Here are three (apparently) unrelated issues with my RV-6:

           

           Aileron trim: 

           

           When I move the ailerons then the trim lever between the seats           follows them. I have not noticed that before. From what I           remember the trim lever remained in position and could be           moved only by hand to adjust the ailerons. Is it normal for           the trim lever to move with the ailerons? If not, is the           aircraft airworthy if it does and what can be done to prevent           this from happening?

           

           Squeak and vibrations from wheel struts:

           

           When I push my aircraft on the ground everything goes well.           But when I stop I hear some squeaky sounds. Upon closer           inspection vibrations emanate from the wheel struts. This           happens also when I rock the aircraft or when I pull it           backwards. I removed the wheel covers and pumped up the tyres.           This did not have much effect. I can feel the vibration on the           pants of the struts. What could the problem be and what can be           done to remedy it? Does it have anything to do with the brake           lines?

           

           Slight odour of fuel in cockpit:

           

           When I open the cockpit by sliding the canopy I think that I           can smell slightly fuel. I have not noticed any leak or loss           of fuel. After leaving the cockpit open for a few minutes this           disappears. I have noticed this for the past few months. Is           there anything I can do to locate the source of the odour? I           suppose that there are a few vapours.

           

           Thanks for answering any one of the above questions (or any           combination).

           

           George Nielsen

           RV-6 PH-XGN

           The Hague, the Netherlands

         

       	
     [b]

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Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?RV6-List

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