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RVNewsletter · Posted: Tue Jun 17, 2008 7:40 pm Post subject: Rudder cable rubbing

In my 7A, the rudder cable seems to be hitting the side of the bushing as it passes thrugh the first side bulkhead. Is anyone else finding that?

And at the exit point near the tail, it seems to want to catch the skin at the very back of the exit hole. Has anyone had to enlarge that area?

bullojm1 · Posted: Tue Jun 17, 2008 8:25 pm Post subject:

Bob-

Great timing on this question....I just put the rudder cables in last night. At the exit point I extended the plastic bushing until the exit point. I am going to cover this with the Avery rudder cable fairings (http://www.averytools.com/p-710-rudder-cable-fairing-sets-for-rvs.aspx). I believe the location of the plastic bushing on the cable is indicated on one drawing. Here is how mine looks:

As far as the front interference goes, did you notch back the F-902 bulkhead? Here is how mine looks:

_________________
Mike Bullock
http://www.rvplane.com
RV-7 | Superior IO-360 | Whirlwind 200RV
Garmin 430W | GRT Dual Sport EFIS
Status: Firewall Forward / Wiring

cjensen · Posted: Tue Jun 17, 2008 8:27 pm Post subject:

I did the exact same thing as Mike did with the plastic bushing at the rear exit. I used fairings also, and they cover up the plastic nicely.

_________________
Chad Jensen
N755CB|RV-7|Airworthy 7/6/2010
RV-7 Build Log

RVNewsletter · Posted: Tue Jun 17, 2008 8:28 pm Post subject:

I didn't notch that. I'll have to check the plans for that. But that's not where it's rubbing.... basically it's not going throgh the center of the bushing hole. I suppose I could try to bend the tabs on the rudder pedals a bit.

cjensen · Posted: Tue Jun 17, 2008 8:32 pm Post subject:

I don't think there is anything you can do about it rubbing the bushing. Since the cables basically make a shallow bend at the 705 bulkhead, the cables will have to rub the bushing at one of the bulkheads, whether it's the 904 (5?), 704 or 705. It might rub the plastic down over time, but it's not something that can't be checked at each condition. Mine rubs too...
_________________
Chad Jensen
N755CB|RV-7|Airworthy 7/6/2010
RV-7 Build Log

rob · Posted: Wed Jun 18, 2008 8:14 am Post subject: Common problem

This is common -- I think most folks put some silicone tubing or similar through the first snap bushing in that forward bulkhead to prevent the cable end from catching on the bushing. I'll have to check, but I am pretty sure mine hit the snap bushings too. You really don't notice this until you rig the cables up to the rudder and start "playing" around.
_________________
Rob Johnson
RV-7 - flying the **** out of it

az_gila · Class G Joined: 11 Jun 2006 Posts: 5