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Elevator pushrod idler arm assembly

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MauleDriver(at)nc.rr.com
Guest

Posted: Wed Nov 21, 2007 5:34 am Post subject: Elevator pushrod idler arm assembly

It seems that the plans specify a 7/16" thick rod end bearing and a 1/2" 

thick rod end bearing to both be fastened to the Idler arm clevis.  But 

the clevis is 7/16" wide.



I find it odd they the design would call for two rod end bearings of 

different thicknesses to share a single clevis.



Did anyone else run into this or can you otherwise tell me where I'm 

going wrong?



I've gone back and double checked the plans and the manual to find that:

The forward pushrod has rod end bearing MD3614M on its aft end, which 

according to the builders manual is 7/16" thick

The rear pushrod has rod end bearing MD3616M on both ends which 

according  to the builders manual is 1/2" thick



I think I can force the idler arm clevis to accept both but that just 

doesn't seem like good design or practice.



Bill Watson

40605

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jesse(at)saintaviation.co
Guest

Posted: Wed Nov 21, 2007 6:04 am Post subject: Elevator pushrod idler arm assembly

The smaller of the two gets washers to make up the space.



do not archive



Jesse Saint

Saint Aviation, Inc.

jesse(at)saintaviation.com

www.saintaviation.com

352-427-0285



MauleDriver wrote:

 	  Quote: 	
		   



 It seems that the plans specify a 7/16" thick rod end bearing and a 1/2"

 thick rod end bearing to both be fastened to the Idler arm clevis.  But

 the clevis is 7/16" wide.



 I find it odd they the design would call for two rod end bearings of

 different thicknesses to share a single clevis.



 Did anyone else run into this or can you otherwise tell me where I'm

 going wrong?



 I've gone back and double checked the plans and the manual to find that:

 The forward pushrod has rod end bearing MD3614M on its aft end, which

 according to the builders manual is 7/16" thick

 The rear pushrod has rod end bearing MD3616M on both ends which

 according  to the builders manual is 1/2" thick



 I think I can force the idler arm clevis to accept both but that just

 doesn't seem like good design or practice.



 Bill Watson

 40605

- The Matronics RV10-List Email Forum -

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?RV10-List

MauleDriver(at)nc.rr.com
Guest

Posted: Wed Nov 21, 2007 6:13 am Post subject: Elevator pushrod idler arm assembly

Duh.... Nevermind.  The walk back from the hangar in the crisp morning 

air provided some insight.  I went back and  once again looked at the 

plans focusing on the washer configuration.  Looking carefully, I see 

that to 10L washers are used inside the clevis to build up the thinner 

rod end.  With a push and a squeeze, that should work.



Bill "more coffee" Watson

40605



MauleDriver wrote:

 	  Quote: 	
		   



 It seems that the plans specify a 7/16" thick rod end bearing and a 

 1/2" thick rod end bearing to both be fastened to the Idler arm 

 clevis.  But the clevis is 7/16" wide.



 I find it odd they the design would call for two rod end bearings of 

 different thicknesses to share a single clevis.



 Did anyone else run into this or can you otherwise tell me where I'm 

 going wrong?



 I've gone back and double checked the plans and the manual to find that:

 The forward pushrod has rod end bearing MD3614M on its aft end, which 

 according to the builders manual is 7/16" thick

 The rear pushrod has rod end bearing MD3616M on both ends which 

 according  to the builders manual is 1/2" thick



 I think I can force the idler arm clevis to accept both but that just 

 doesn't seem like good design or practice.



 Bill Watson

 40605

- The Matronics RV10-List Email Forum -

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?RV10-List

Tim Olson

Joined: 25 Jan 2007
Posts: 2879

Posted: Wed Nov 21, 2007 6:31 am Post subject: Elevator pushrod idler arm assembly

Bill, what page and control arm number are you talking about?



I see page 39-3 with a F-1089 that uses a GMM-4M-675 on the

forward end, and a MD3614M on the aft.  Then on page 39-4

there's a F-1090 that uses 2 of the MD3616M's.  And, then

on page 39-6 it shows th attachment of the aft end of F-1089

with it's MD3614M connecting to the idler arm with the

F-1090's MD3616M, but you can see washers inserted on that

forward part of the idler arm for the smaller one.  That bracket

should be big enough for both of those, not small so you have

to stuff the larger one in.



Tim Olson - RV-10 N104CD - Flying



MauleDriver wrote:

 	  Quote: 	
		   

 

 It seems that the plans specify a 7/16" thick rod end bearing and a 1/2" 

 thick rod end bearing to both be fastened to the Idler arm clevis.  But 

 the clevis is 7/16" wide.

 

 I find it odd they the design would call for two rod end bearings of 

 different thicknesses to share a single clevis.

 

 Did anyone else run into this or can you otherwise tell me where I'm 

 going wrong?

 

 I've gone back and double checked the plans and the manual to find that:

 The forward pushrod has rod end bearing MD3614M on its aft end, which 

 according to the builders manual is 7/16" thick

 The rear pushrod has rod end bearing MD3616M on both ends which 

 according  to the builders manual is 1/2" thick

 

 I think I can force the idler arm clevis to accept both but that just 

 doesn't seem like good design or practice.

 

 Bill Watson

 40605

- The Matronics RV10-List Email Forum -

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?RV10-List

MauleDriver(at)nc.rr.com
Guest

Posted: Wed Nov 21, 2007 6:47 am Post subject: Elevator pushrod idler arm assembly

I missed the washers.  I just didn't focus in on where they were to be 

inserted.  Too early in the morning and not enough caffeine.



However, the idler arm 'clevis' measures 7/16" rather than the 1/2" 

needed but after a little coaxing it shouldn't be a problem. 



Thanks.



Tim Olson wrote:

 	  Quote: 	
		   



 Bill, what page and control arm number are you talking about?



 I see page 39-3 with a F-1089 that uses a GMM-4M-675 on the

 forward end, and a MD3614M on the aft.  Then on page 39-4

 there's a F-1090 that uses 2 of the MD3616M's.  And, then

 on page 39-6 it shows th attachment of the aft end of F-1089

 with it's MD3614M connecting to the idler arm with the

 F-1090's MD3616M, but you can see washers inserted on that

 forward part of the idler arm for the smaller one.  That bracket

 should be big enough for both of those, not small so you have

 to stuff the larger one in.



 Tim Olson - RV-10 N104CD - Flying



 MauleDriver wrote:

> 

>

> It seems that the plans specify a 7/16" thick rod end bearing and a 

> 1/2" thick rod end bearing to both be fastened to the Idler arm 

> clevis.  But the clevis is 7/16" wide.

>

> I find it odd they the design would call for two rod end bearings of 

> different thicknesses to share a single clevis.

>

> Did anyone else run into this or can you otherwise tell me where I'm 

> going wrong?

>

> I've gone back and double checked the plans and the manual to find that:

> The forward pushrod has rod end bearing MD3614M on its aft end, which 

> according to the builders manual is 7/16" thick

> The rear pushrod has rod end bearing MD3616M on both ends which 

> according  to the builders manual is 1/2" thick

>

> I think I can force the idler arm clevis to accept both but that just 

> doesn't seem like good design or practice.

>

> Bill Watson

> 40605

- The Matronics RV10-List Email Forum -

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:

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