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05-14-2008, 04:15 PM
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Join Date: Dec 2006
Location: Italy
Posts: 203
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Rudder rod end problem
Ok, the rudder is complete (except dor the fiberglass tip) and I was mating it with the VS to see the effect, but I have a problem:
the central rod end doesn't fit into the VS hinge bracket!! 
The upper and lower are perfect, but the central one is 0.05" bigger than the space between the hinge brackets on the VS (the rod end looks centered on the hinge brackets). Obviously, the rod end itself is the right one , it's the space between the hinge brackets that is not as (I think) it should be. 
What to do? Do I have to simply force the rod end between the hinge brackets or do I have to search for a different solution (maybe a different kind of rod end)???
Help please!!
__________________
Claudio
Was Avellino - Italy...
Now Cypress, TX
www.rv7a.it
RV-7 I-KLAU (Reserved)
Empennage Done!! (except fiberglass)
Wings done!!
Working on aft fuse.
...SOLD! 
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05-14-2008, 05:05 PM
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Join Date: Mar 2005
Location: Dallas area
Posts: 10,775
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The larger rod end bearing goes at the bottom. It carries the extra load of the cables. Check and see of your bottom one has extra slack.
__________________
Mel Asberry, DAR since the last century.
EAA Flight Advisor/Tech Counselor, Friend of the RV-1
Recipient of Tony Bingelis Award and Wright Brothers Master Pilot Award
USAF Vet, High School E-LSA Project Mentor.
RV-6 Flying since 1993 (sold)
<rvmel(at)icloud.com>
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05-14-2008, 05:13 PM
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Join Date: Dec 2006
Location: Italy
Posts: 203
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Hi Mel,
the rod end on the bottom is different (a bit larger and with a longer thread) and is in the right place. The one in the center is the same as the one on the top, but in the center I have the problem.
I think the problem is with the hinge brackets: it looks like the holes used to rivet them to the VS spar ar not on the centerline of the flange but a little outward. This reduce the gap between them (the hinge brackets were prepunched, so I don't think it's my fault). I really hope I don't have to dismantle the VS to change the brackets! 
__________________
Claudio
Was Avellino - Italy...
Now Cypress, TX
www.rv7a.it
RV-7 I-KLAU (Reserved)
Empennage Done!! (except fiberglass)
Wings done!!
Working on aft fuse.
...SOLD!
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05-14-2008, 05:19 PM
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Join Date: Mar 2005
Location: Dallas area
Posts: 10,775
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If we're only talking 0.050", you can probably bend the brackets enough (0.025" ea.). Just make sure that when everything is clamped down, nothing is dragging.
Sent you an e-mail.
__________________
Mel Asberry, DAR since the last century.
EAA Flight Advisor/Tech Counselor, Friend of the RV-1
Recipient of Tony Bingelis Award and Wright Brothers Master Pilot Award
USAF Vet, High School E-LSA Project Mentor.
RV-6 Flying since 1993 (sold)
<rvmel(at)icloud.com>
Last edited by Mel : 05-14-2008 at 05:23 PM.
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05-14-2008, 05:26 PM
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Join Date: Jul 2005
Location: Detroit, MI
Posts: 1,587
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Pre-punched?
It's been a while, but I think I recall that the holes in the VS spar and the holes in the brackets are pre-punched in this model. Given that, I'd look to see if the brackets are truly at right angles to start with.
__________________
H. Evan's RV-7A N17HH 240+ hours
"We can lift ourselves out of ignorance, we can find ourselves as creatures of excellence and intelligence and skill. We can be free! We can learn to fly!" -J.L. Seagull
Paid $25.00 "dues" net of PayPal cost for 2015, 2016, 2017 and 2018 (December).
This airplane is for sale: see website. my website
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05-14-2008, 06:46 PM
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Join Date: Feb 2005
Location: Victoria B.C.
Posts: 1,266
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This is a common problem. Just spread the hinge brackets a bit while installing the rudder. All will be ok.
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05-14-2008, 07:33 PM
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Join Date: Jan 2005
Location: 57AZ - NW Tucson area
Posts: 10,011
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Bendable....
Quote:
Originally Posted by Norman CYYJ
This is a common problem. Just spread the hinge brackets a bit while installing the rudder. All will be ok.
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...and that is why Vans changed the hinge brackets from 1/8 alum. angle on the RV4/6 to the much thinner, more flexible steel on the later models.... 
gil A
__________________
Gil Alexander
EAA Technical Counselor, Airframe Mechanic
Half completed RV-10 QB purchased
RV-6A N61GX - finally flying
Grumman Tiger N12GA - flying
La Cholla Airpark (57AZ) Tucson AZ
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05-15-2008, 02:07 AM
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Join Date: Dec 2006
Location: Italy
Posts: 203
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Quote:
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...I recall that the holes in the VS spar and the holes in the brackets are pre-punched in this model...
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Yes, the holes are pre-punched, but the brackets are at 90°.
Quote:
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...you can probably bend the brackets enough (0.025" ea.)...
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I think this is the way to go. I sent Van's an e-mail and I'm waiting for an answer. I'll let you know.
UPDATE
This is what Van's tech assistance said:
Just spread the hinge brackets slightly to get the bearing between them.
0.05 is not enough to cause a problem
Thanks to everyone!
__________________
Claudio
Was Avellino - Italy...
Now Cypress, TX
www.rv7a.it
RV-7 I-KLAU (Reserved)
Empennage Done!! (except fiberglass)
Wings done!!
Working on aft fuse.
...SOLD!
Last edited by mototopo : 05-15-2008 at 08:58 AM.
Reason: Update
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