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Rudder question- ditto

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Deems Davis

Joined: 09 Jan 2006
Posts: 925

Posted: Wed Nov 29, 2006 4:17 pm Post subject: Rudder question- ditto

I haven't seen a response to John's question, I too would like to know 

how other builders have set them up. when I installed my cable guides 

they were very tight, how tight did you 'fly guys leave them?



Deems Davis # 406

Finishing - ( A Misnomer ! )

http://deemsrv10.com/



John Hasbrouck wrote:



 	  Quote: 	
		   Question regarding rudder bearing blocks and the "nylon" rudder cable 

 guides.  How snug should both of these be?  I can tighten the center 

 rudder bearing block to the pont where the rudder pedals will not 

 move, obviously too tight.  Same with the rudder cable guides.  How 

 much play do we need in these?  Are the aerodynamic forces on the 

 rudder enough to overcome the situation?  Will there be enough wear in 

 to loosen the pedals and the cable?  Inquiring minds want to know

  

 John Hasbrouck

 #40264



*

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Tim(at)MyRV10.com
Guest

Posted: Wed Nov 29, 2006 5:39 pm Post subject: Rudder question- ditto

The cable guides for the rudder can be tight.  You'll be moving

the pedals with your strong legs.  You wouldn't want the pedals

loose and flopping around....it'll take a bit of a push to move

them.  If you can tighten the center block to the point where you

can't move the pedals, my question is....how much force would

it take for you to move them...a lot, or a little?  If you

honestly can't move them, even with huge force, yeah, they're

too tight.  I can't imagine the hole being drilled right and

not having it be at least close.   As for the aerodynamic forces,

there isn't much for force on a trailing rudder....until you

push it out into the wind, and at that point, there's lots of

force trying to re-center it.   My guess is everything is just

fine, as long as everything is moveable in some way.

Tim Olson - RV-10 N104CD - Flying

do not archive

Deems Davis wrote:

 	  Quote: 	

 I haven't seen a response to John's question, I too would like to know 

 how other builders have set them up. when I installed my cable guides 

 they were very tight, how tight did you 'fly guys leave them?

 Deems Davis # 406

 Finishing - ( A Misnomer ! )

 http://deemsrv10.com/

 John Hasbrouck wrote:

> Question regarding rudder bearing blocks and the "nylon" rudder cable 

> guides.  How snug should both of these be?  I can tighten the center 

> rudder bearing block to the pont where the rudder pedals will not 

> move, obviously too tight.  Same with the rudder cable guides.  How 

> much play do we need in these?  Are the aerodynamic forces on the 

> rudder enough to overcome the situation?  Will there be enough wear in 

> to loosen the pedals and the cable?  Inquiring minds want to know

>  

> John Hasbrouck

> #40264

>

> *

> *

>

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jhasbrouck(at)woh.rr.com
Guest

Posted: Wed Nov 29, 2006 6:05 pm Post subject: Rudder question- ditto

Tim,

     Thanks for the reply!!  Since I don't have seats installed I can't get 

good read on how the rudders will feel when moved with my legs.  Did you 

torque the bolts for the center block to the values recomended for the AN3 

bolt?  If I do that I can't move the pedals with my hands but that doesn't 

speak to how they'd feel with my legs.  Trying to avoid having to go back 

and adjust stuff  later.  It's much easier when it's all open......john



#40264

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Tim(at)MyRV10.com
Guest

Posted: Wed Nov 29, 2006 6:25 pm Post subject: Rudder question- ditto

That seems strange that you couldn't move them at ALL with your hands.

I mean, it'll take a shove on the bottom of the pedal, and then

suddenly they break free and swing, but you should at least

be able to move them.  Is there a huge gap between the block halves

or something that is allowing it to be super tight, or is it

basically coming together right when you start to tighten the

bolts?  I just can't imagine that part being able to be torqued

so that it pinches too tightly to be good...but I suppose it's

possible somehow.  If you can't move them with your hands though,

with even a hard push on the bottom of the pedal, then I'd

say that is too tight.  Maybe some silicone spray would help,

or at that point you may want to verify the parts are cut properly.



Tim Olson - RV-10 N104CD - Flying

do not archive

John Hasbrouck wrote:

 	  Quote: 	
		   

 

 Tim,

     Thanks for the reply!!  Since I don't have seats installed I can't 

 get good read on how the rudders will feel when moved with my legs.  Did 

 you torque the bolts for the center block to the values recomended for 

 the AN3 bolt?  If I do that I can't move the pedals with my hands but 

 that doesn't speak to how they'd feel with my legs.  Trying to avoid 

 having to go back and adjust stuff  later.  It's much easier when it's 

 all open......john

 

 #40264

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jhasbrouck(at)woh.rr.com
Guest

Posted: Wed Nov 29, 2006 7:30 pm Post subject: Rudder question- ditto

Tim,

     The block halves come together fine but the diameter of the opening has 

been reduced by the width of the saw blade used to cut the block in half. 

While we've been discussing back and forth I've been working the rudder 

pedals and I think they are "wearing in".  The movement seems to be freeing 

up with use and as it does I've tightened the bolts a little more.  My 

biggest concern was that there would be sufficient aerodynamic force to 

re-center the rudder and over come the friction in the system....john



#40264

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jesse(at)itecusa.org
Guest

Posted: Thu Nov 30, 2006 6:24 am Post subject: Rudder question- ditto

Tight enough to put some drag, but not really tight.  It helps to keep the

cables a little snug in their places if they hold on, but you certainly

don't want it so tight that you can't move it with your hand.  I can't speak

to whether it will loosen with wear or not, but I wouldn't want to leave it

that way.



Just my take on it.



Jesse Saint

I-TEC, Inc.

jesse(at)itecusa.org

www.itecusa.org

W: 352-465-4545

C: 352-427-0285



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