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  #1  
Old 10-28-2017, 02:02 PM
goatflieg's Avatar
goatflieg goatflieg is offline
 
Join Date: Jul 2013
Location: Clarkston, MI
Posts: 307
Default Rudder Cable/Gear Tower Interference

I ordered my RV-8 with ground adjustable rudder pedals. Since the air-adjustable setup is now standard, the ground adjustable setup seems to require a fair amount of fettling to get right. I've worked out most of the bugs, but there is one issue that I haven't seen mentioned in any searches yet. When either of my pedals travel to full extention, the F-852C forward rudder cable and the castle nut/bolt that join the forward and aft rudder cables make contact with the aft reinforcement rib on the WD-813-1 landing gear bolt weldment at the base of the gear tower (see photo below). In a worst-case scenario, it might be possible for the bolt head or castle nut to get caught on the front side of the reinforcement rib, jamming the rudder in full deflection. I realize that if this happens I could reach down and pull it free, but I want to eliminate the possibility of it happening. I also don't want any contact wear to occur on any of the components involved. I've thought of a few potential solutions, but I wanted to ask here to see if anyone else has had this issue and what they did about it.

Thanks.
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Martin J Filiatrault
Clarkston, MI
RV-8 #83507 - empennage complete (except fiberglass)
QB wings & fuselage work continues
N657AR reserved
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Last edited by goatflieg : 10-28-2017 at 02:06 PM.
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  #2  
Old 10-29-2017, 02:46 PM
aerovin aerovin is offline
 
Join Date: Nov 2007
Location: Lincoln, CA
Posts: 122
Default

Martin,

It's good to see you making good progress on the RV-8. When I purchased my kit you had the option of ground adjustable or air adjustable rudder pedals and I opted for the ground adjustable. Looking at your photo, they have either changed the ground adjustable rudder pedal kit or else you are missing an arm that bolts in and allows the cable to pivot. It's where my rear pedals attach into the linkage. The somewhat hairy leg in the photo is applying full left rudder.



I hope to get back to Oshkosh for 2018 so maybe I'll see you there.
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RV-8 N9324Z (flying as of 8/30/15)
http://www.aerovintage.com/rv8/rv8-index.htm

Last edited by aerovin : 10-29-2017 at 02:54 PM.
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  #3  
Old 10-29-2017, 03:43 PM
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skylor skylor is offline
 
Join Date: Aug 2009
Location: Southern California
Posts: 560
Default

Quote:
Originally Posted by aerovin View Post
Martin,

It's good to see you making good progress on the RV-8. When I purchased my kit you had the option of ground adjustable or air adjustable rudder pedals and I opted for the ground adjustable. Looking at your photo, they have either changed the ground adjustable rudder pedal kit or else you are missing an arm that bolts in and allows the cable to pivot. It's where my rear pedals attach into the linkage. The somewhat hairy leg in the photo is applying full left rudder.



I hope to get back to Oshkosh for 2018 so maybe I'll see you there.
I think the idler arms you show are actually part of the rear seat rudder pedal option and might not be included with the ground adjustable or in flight adjustable kits.

Skylor
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  #4  
Old 10-29-2017, 04:21 PM
aerovin aerovin is offline
 
Join Date: Nov 2007
Location: Lincoln, CA
Posts: 122
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Yep, you are correct. My mistake.
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RV-8 N9324Z (flying as of 8/30/15)
http://www.aerovintage.com/rv8/rv8-index.htm
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  #5  
Old 10-29-2017, 06:10 PM
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goatflieg goatflieg is offline
 
Join Date: Jul 2013
Location: Clarkston, MI
Posts: 307
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I was unaware of the idler arm for the rear rudder pedals, as I did not order them. Maybe I'll call Van's and get the arm only. That's a nice solution.
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Martin J Filiatrault
Clarkston, MI
RV-8 #83507 - empennage complete (except fiberglass)
QB wings & fuselage work continues
N657AR reserved
Builder websites:
http://goatflieg.blogspot.com/
http://www.mykitlog.com/goatflieg/
Dues paid for 2017... extra payment included for psychological therapeutic services rendered.

_______________________

Have you ever gotten the feeling you were smarter than you could ever prove?
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  #6  
Old 10-30-2017, 10:04 AM
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AAflyer AAflyer is offline
 
Join Date: May 2009
Location: Belle Mead, New Jersey
Posts: 281
Default My cheap & easy fix

Here's my simple solution to that problem. I've put 130+ hours on my 1-year old -8, and have never noticed a problem with this "fix".

http://websites.expercraft.com/dbw/i...y&log_id=87915
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QB RV-8 N148BW
First Flight: Oct '16
AeroSport Power IO-360 180hp w/dual P-Mags
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