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Ask 18 1/4 scale glider from Cliff Charlesworth plans

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Steve Sheppard14/12/2013 17:52:19
21 forum posts
2 photos

Hi Stuart

I have a 1/4 scale T61 which had a sloppy servo linkage with a rear mounted servo( and lead in the nose).I moved the servo to the rear of the cockpit and used a 6mm carbon rod with 3mm pushrods epoxied down the tube.This is supported down the fuselage with 2 no 6mm square balsa across the fuselage frames and 2 vertically in the form of a cross with the carbon pushrod running in the hole. one at either end of the fuselage. This has removed the slop and allowed me to remove 125g of lead from the nose.

Hope this helps

Steve

Stuart Eggerton15/12/2013 16:48:11
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352 forum posts
302 photos
Hi Steve thanks for your reply. Just a few questions about your set up, the carbon tube is it solid or hollow? Did you drill the solid carbon tube to accept 3mm wire and then epoxy in place?I am reading that the carbon tube then slides back and forth between the guides at each end you have described, is this correct?
Steve Sheppard15/12/2013 21:33:00
21 forum posts
2 photos

Hi Stuart

The carbon rod is hollow.The hole is a good fit for the 3mm pushrod and epoxy.I then bound the pushrod around the end of the tube with thread and epoxy for insurance!

Yes the carbon rod part of the pushrod slides in the balsa guides .I installed the pushrod and then fitted the guides to ensure no slop or binding.

Steve

Stuart Eggerton17/12/2013 19:54:02
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352 forum posts
302 photos

Hi Steve, thank you for the explanation of your method, I will try this out

Stuart Eggerton27/12/2013 13:13:35
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352 forum posts
302 photos
Hi Steve, I have received some 6mm carbon tube with a 3mm inside diameter, the length is just right! Just a quick question about the 3mm pushrods. Firstly is this just 3mm wire with a bend at each end to go through the control horn/servo head with keepers at each end. Or do you have the threaded variety which take a metal clevis on the end, one that is adjustable by screwing the clevis in or out?.

Steve Sheppard27/12/2013 16:54:53
21 forum posts
2 photos

Hi Stuart

I use 3mm threaded rod with a metal clevice each end.I also used a lock nut on the rod and silicone tube on the clevice as the linkage is only accessible by removing the fin and tailplane.

Steve

Stuart Eggerton27/12/2013 18:17:52
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352 forum posts
302 photos

Hi Steve, perfect, thank you very much for your reply. I will let you know how I get on. It will be great to fly the K18 without elevator slop

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