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Flap actuator to rod end - locking

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Doug Gray

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

Posted: Tue Aug 08, 2006 3:32 am Post subject: Flap actuator to rod end - locking

I have converted my manual flap kit to electric.

What are the best options to lock the rod end bearing to prevent it

spinning out of the actuator when the jam nut works loose.

Doug Gray

RV-6 finishing kit

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Albert Gardner

Joined: 10 Jan 2006
Posts: 455
Location: Yuma, AZ

Posted: Tue Aug 08, 2006 7:18 am Post subject: Flap actuator to rod end - locking

Van's suggest you drill a small hole at the lip of the actuator tube and

safety wire the tube so that it can't spin relative to the rod end bearing.

It's a little hard to get a hole there but a small drill started

perpendicular to the tube and then angled seems to work.

Albert Gardner

Yuma, AZ



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_________________
RV-9A N872RV
RV-10 N991RV

jrdial(at)hal-pc.org
Guest

Posted: Tue Aug 08, 2006 7:53 am Post subject: Flap actuator to rod end - locking

They show how to drill and safety wire the lock nut in the

drawings. I did not do it and mine came loose so I would sure recommend

doing it. I did not pay attention to how it worked but when the motor

runs it puts a small amount of torque on the shaft that can eventually

cause the nut to loosen up. It took mine 225 hours to come loose.



	





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jeffpoint

Joined: 10 Jan 2006
Posts: 72
Location: MKE

Posted: Tue Aug 08, 2006 9:57 am Post subject: Flap actuator to rod end - locking

I spun a nylock nut on backwards, and torqued it against the rod end as 

a stop nut.  Hasn't budged a bit, but I check it every annual.



Jeff Point

RV-6

Milwaukee

 	  Quote:

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Jeff Point
RV-6
Milwaukee WI

seiders(at)bellsouth.net
Guest

Posted: Tue Aug 08, 2006 12:27 pm Post subject: Flap actuator to rod end - locking

The safety wire is new since my 6A.. Rod end loosened one time about 300 

hrs ago. I put some loctite on it and no problem since.

DICK



At 11:53 AM 8/8/2006, you wrote:

[quote]

         They show how to drill and safety wire the lock nut in the

drawings. I did not do it and mine came loose so I would sure recommend

doing it. I did not pay attention to how it worked but when the motor

runs it puts a small amount of torque on the shaft that can eventually

cause the nut to loosen up. It took mine 225 hours to come loose.

--

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Albert Gardner

Joined: 10 Jan 2006
Posts: 455
Location: Yuma, AZ

Posted: Tue Aug 08, 2006 2:31 pm Post subject: Flap actuator to rod end - locking

The safety wire solution is not the only way to solve this problem but it is

fairly simple to do. When my rod end came loose, I was on final. Going from

half to full flaps, there was a bang, and all at once I had no flaps. Bit of

a surprise. 

Albert Gardner

RV-9A N872RV

Yuma, AZ

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_________________
RV-9A N872RV
RV-10 N991RV

lhelming(at)sigecom.net
Guest

Posted: Tue Aug 08, 2006 2:58 pm Post subject: Flap actuator to rod end - locking

The safety wire approach is the way of construction on the newer RV7/A 

models.  I guess it is one of the improvements learned from the 6.  Find 

someone with a 7 kit and take a look at their builder's book.  Larry in 

Indiana  do not archive

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