Here is a very effective, easy way to connect control linkage. I have used this way for years without any failures. This system is self locking and easy to disconnect when needed. It is also the system we recommend on our prop jets because of the strength. The down side to this system is it does not allow for adjustments at the ends. For me this has not really been a problem. I just don’t glue the end until I center my control surface and servo, Once it’s centered there really is no need for adjustment.
First start by lightly sanding the metal and carbon where the string will make contact. I suggest putting on the control arm before gluing, this will allow for a better fit, just make sure it fits tight against the control arm. Now wrap with string and soak with CA, or instead if your using shrink wrap just place some CA on the spot where the shrink tubing will go, slide it on and heat. Some CA will come out of the end and that’s OK.
I have switched to shrink wrap because it’s easier and has worked perfectly. Any comments would be appreciated.
Mark
#1 by Robert Dawson on April 19th, 2010
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You can do a simular way by using a z-bend on the end instead of 90 degree bend.Use heat shrink and if it needs to be adjusted reheat.Once aligned use thin CA and let it wick between the wire and carbon rod inside of heat shrink.Won’t come off with pliars,very strong.
Just make a z-bend w/o damaging the clevis part of z-bend other-wise the servo holes will get bigger and slop will occur.Du-Bro make some z-bender tools that doesn’t flatten clevis part of bend.
This method looks good also and you don’t need a z-bender tool,just don’t flatten the clevis part of bend.Also by using heat shrink you can adjust before you apply CA.
#2 by Mathew Wellington on March 13th, 2010
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These linkages work well, I have them on my RF22 and have also used the same technique for a few scratch builds as well.