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Closed loop...

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john stones 124/02/2020 11:03:11
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11102 forum posts
1498 photos

I got rid of the clatter Nigel, am now pondering cutting the horns out, I've a pair with more forward rake that'll get me over the hinge line.

Nigel R24/02/2020 11:27:08
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3464 forum posts
524 photos

Slightly set back rudder horn gives a reduction in tension in the system when the rudder is fully deflected. Is there a problem with slack in the system that needs fixing?

Engine Doctor24/02/2020 11:51:34
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2402 forum posts
31 photos

Provide both lines are tight around the center then it should be ok . And its when rudder/ elevator is around the neutral position that flutter will cause a problem if lines are slack. When inputting control movements the pulling line will / should but enough tension to stop any flutter Unless you get the geometry absolutely accurate then the line pulling will always be tighter. Make sure that the width of the horns and the servo arm are the same diameter and that holes are the same distance from the center-line and it should work out

Tim Flyer24/02/2020 12:01:38
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1212 forum posts
231 photos

Sounds a good plan👍

john stones 124/02/2020 21:40:58
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11102 forum posts
1498 photos

Well I got there eventually, curved horn facing the rear, ran them uncrossed after a bit of tweaking with a file, no points for the individual who designed that kerfuffle, ball links under the servo arm because the bolt head hit the canopy floor, can't beat a servo at rear and a push rod.closed loop 002.jpgclosed loop 003.jpg

closed loop 004.jpg

Gary Manuel25/02/2020 10:21:19
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2186 forum posts
1540 photos

That looks better.

One observation though. Any reason why the ball links are underneath the servo arm rather than on top. On top would give more clearance underneath.

john stones 125/02/2020 13:36:11
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11102 forum posts
1498 photos

Yep, I say why in my comments Gary, they foul the underneath of the canopy when on top, they also run the cables better for the exit, poorly designed.

Gary Manuel25/02/2020 15:43:31
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2186 forum posts
1540 photos
Posted by john stones 1 on 25/02/2020 13:36:11:

poorly designed.

Looks that way if they've not left space for the rudder controls above the servo tray. I'm surprised as I thought Pilot were a top brand.

john stones 125/02/2020 16:06:08
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11102 forum posts
1498 photos

Model is excellent, the closed loop thinking apart.

Martin Harris25/02/2020 16:12:08
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9154 forum posts
229 photos

Maybe designed with clevises in mind?

john stones 125/02/2020 17:38:16
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11102 forum posts
1498 photos

Previous owner would've used supplied parts Martin.

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