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Lubricating UHMW Blocks

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ron.mcgann(at)baesystems.
Guest

Posted: Tue Aug 15, 2006 6:05 pm Post subject: Lubricating UHMW Blocks

Question for today . . .    

I was finishing off the control activation and flaps last night and noticed a significant amount of friction between the UHMW blocks and flap torque tubes.  Given that there are four such tube/block interfaces, the total amount of friction may create significant startup torque on the flap motor.  I understand that the UHMW blocks are teflon based and therefore self lubricating, but is there a recommended way of reducing the surface friction with the torques tubes?  Is lightly sanding or polishing the paint from the torque tubes or inside of the bushing, or using an additional lubricant preferred??  

thanks in advance (yet again)  

Ron  

#187      [quote][b]

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jesse(at)itecusa.org
Guest

Posted: Tue Aug 15, 2006 6:40 pm Post subject: Lubricating UHMW Blocks

They do go in pretty tight, but that doesn’t seem to make any difference on the functionality of the flaps.  I am sure, with the torque on the flap motor, it is probably better to have them tight and add a little bit of torque than to have them loose and add the possibility of vibration/movement in the system.  I would think that the amount of torque in the plastic blocks would be substantially less than the torque of dropping the flaps from 0 to 15 or 15 to 30 degrees at 100kts/mph, whichever the max flap speed is.  We haven’t used any lubrication or modified the parts at all.  Anybody else out there with different experiences?  

     

Jesse Saint  

I-TEC, Inc.  

jesse(at)itecusa.org (jesse(at)itecusa.org)  

www.itecusa.org  

W: 352-465-4545  

C: 352-427-0285  

        

  

From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of McGANN, Ron

 Sent: Tuesday, August 15, 2006 10:05 PM

 To: rv10-list(at)matronics.com

 Subject: Lubricating UHMW Blocks  

  

   

Question for today . . .   

I was finishing off the control activation and flaps last night and noticed a significant amount of friction between the UHMW blocks and flap torque tubes.  Given that there are four such tube/block interfaces, the total amount of friction may create significant startup torque on the flap motor.  I understand that the UHMW blocks are teflon based and therefore self lubricating, but is there a recommended way of reducing the surface friction with the torques tubes?  Is lightly sanding or polishing the paint from the torque tubes or inside of the bushing, or using an additional lubricant preferred??  

thanks in advance (yet again) 

 Ron 

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     --  No virus found in this incoming message. Release Date: 8/14/2006 

  

--

 8/14/2006

     [quote][b]

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coop85(at)bellsouth.net
Guest

Posted: Tue Aug 15, 2006 6:48 pm Post subject: Lubricating UHMW Blocks

Ron,  

   I opted for the light sanding and it seemed to help a lot.  

   

Marcus  

40286  

   

First flight (attempt) this Saturday!  

         

  

From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of McGANN, Ron

 Sent: Tuesday, August 15, 2006 10:05 PM

 To: rv10-list(at)matronics.com

 Subject: Lubricating UHMW Blocks  

  

   

Question for today . . .   

I was finishing off the control activation and flaps last night and noticed a significant amount of friction between the UHMW blocks and flap torque tubes.  Given that there are four such tube/block interfaces, the total amount of friction may create significant startup torque on the flap motor.  I understand that the UHMW blocks are teflon based and therefore self lubricating, but is there a recommended way of reducing the surface friction with the torques tubes?  Is lightly sanding or polishing the paint from the torque tubes or inside of the bushing, or using an additional lubricant preferred??  

thanks in advance (yet again) 

 Ron 

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       [quote][b]

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acs(at)acspropeller.com.a
Guest

Posted: Tue Aug 15, 2006 8:42 pm Post subject: Lubricating UHMW Blocks

Ron, I used a scotchbrite pad on the tube…..checked the flap motor with a 12V supply….minimum friction.  

John 40315    

   

From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of McGANN, Ron

 Sent: Wednesday, 16 August 2006 12:05 PM

 To: rv10-list(at)matronics.com

 Subject: Lubricating UHMW Blocks  

  

   

Question for today . . .   

I was finishing off the control activation and flaps last night and noticed a significant amount of friction between the UHMW blocks and flap torque tubes.  Given that there are four such tube/block interfaces, the total amount of friction may create significant startup torque on the flap motor.  I understand that the UHMW blocks are teflon based and therefore self lubricating, but is there a recommended way of reducing the surface friction with the torques tubes?  Is lightly sanding or polishing the paint from the torque tubes or inside of the bushing, or using an additional lubricant preferred??  

thanks in advance (yet again) 

 Ron 

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        [quote][b]

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flysrv10(at)gmail.com
Guest

Posted: Wed Aug 16, 2006 2:37 am Post subject: Lubricating UHMW Blocks

I believe using white grease on them is OK.

Do not archive.

 



On Aug 15, 2006, at 10:04 PM, McGANN, Ron wrote:

[quote]  

Question for today . . .  

I was finishing off the control activation and flaps last night and noticed a significant amount of friction between the UHMW blocks and flap torque tubes.  Given that there are four such tube/block interfaces, the total amount of friction may create significant startup torque on the flap motor.  I understand that the UHMW blocks are teflon based and therefore self lubricating, but is there a recommended way of reducing the surface friction with the torques tubes?  Is lightly sanding or polishing the paint from the torque tubes or inside of the bushing, or using an additional lubricant preferred??

thanks in advance (yet again) 

Ron 

#187    	  Quote: 	
		  

.com/Navigator?RV10-List

ntribution



	
[b]

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Tim(at)MyRV10.com
Guest

Posted: Wed Aug 16, 2006 3:38 am Post subject: Lubricating UHMW Blocks

Mine were pretty tight too, but I just left them.  Spraying them

with something may attract dust and stuff.  110 hours later

they're still fine.  I think the friction is pretty minor

compared to the aerodynamic forces they'll be working against.



Tim Olson - RV-10 N104CD - Flying

do not archive

McGANN, Ron wrote:

 	  Quote: 	
		   Question for today . . .

 

 I was finishing off the control activation and flaps last night and 

 noticed a significant amount of friction between the UHMW blocks and 

 flap torque tubes.  Given that there are four such tube/block 

 interfaces, the total amount of friction may create significant startup 

 torque on the flap motor.  I understand that the UHMW blocks are teflon 

 based and therefore self lubricating, but is there a recommended way of 

 reducing the surface friction with the torques tubes?  Is lightly 

 sanding or polishing the paint from the torque tubes or inside of the 

 bushing, or using an additional lubricant preferred??

 

 thanks in advance (yet again)

 Ron

 #187

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