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Has anyone else had the problem of the aileron cables rubbing at the top of the strut? I am using the larger pulleys and still have the issue. To correct it I need to move the pulleys mount point about 1/2" inboard. I am going to modify the pulley brackets to accomplish that.
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Yes, that condition surfaces now and then.
Have made teflon V shaped wedges for the interior aft end of the strut. Held in place with lockwire stitches or 4-40 screws. -
Would the smaller diameter pulleys hurt you instead of helping? I also have used a hard nylon rub block on the inside of the wing strut when needed. MarkComment
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I had the issue on one side of my LSA. I remade the pulley bracket to lower the pulley a bit which centered the cable in the strut.
I thought about going to a smaller pulley but likely would have had to remake the control cable.Comment
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I think you can use a smaller pulley. It was in one of the older Beartracks I believe.
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Rodsmith, you lost me on your statement of moving the pulley inboard, that would compound the problem if the cable is touching the top of the strut. I am a plans builder and I had this problem. I moved the pulley outboard thus keeping the alignment correct to the outboard pulley. I had to punch out a rivet and made a 4130 bridge to mount the pulley at a new location. I was able to correct my error as the clues were not correct . StingerComment
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It was rubbing on the bottom side of the strut. I spent a few hours modifying the brackets to move the pulley's a 1/2 " inboard. That put the cables right in the center of the strut.The aileron cross over cable was rubbing on the flap support frame tubing on both sides. I added a fairlead on the rib outboard of the flap frame on each side to fix that, still very close.Last edited by rodsmith; 08-13-2017, 09:00 AM.Comment
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I haven't seen that issue so far.Comment
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FYI;
The B model uses 3" pulleys in the wing at the top of the lift strut. The cable rubs the top of the strut fairly significantly I am going to try a smaller pulley before I notch the lift strut..Comment
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I was going to order 2" ones but forgot how expensive they are. Looking around the airframe I found some 1.75" one with a AN5 bolt on the bottom of the fuselage. Tried them and they fit perfect. 2 " might still rub just slightly.
That is the good news. The bad news is my aileron cables just magically got longer.
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I'm having the same issue. Is there any problem with cutting a small fillet at the rear of the top of the strut for clearance? I can't imagine that is a highly stressed area. In any case, a properly curved and finished fillet may actually reduce the stress as opposed to a square corner ......Comment
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