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Making a CF/steel rod rudder pushrod. - 1/16/2013 11:19 PM   
karolh


 

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From: Mandeville, JAMAICA
Status: online 		I am making up a rudder pushrod for my 20cc gas profile and need to connect a .070" O.D. CF rod to a piece of 4-40 threaded rod by inserting each end in a 1.5" long piece of hollow CF rod. My question is which would be a more suitable method of glueing them in the CF rod, using 15 min. epoxy or medium CA with a kicker to harden the joints.

Karol

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RE: Making a CF/steel rod rudder pushrod. - 1/16/2013 11:51 PM   
PatternPilot



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From: Knoxville, TN, USA
Status: offline 		JB weld.... use it all the time for what your doing...

There is a fast set and a sloooow set... Higher TS..

s.

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RE: Making a CF/steel rod rudder pushrod. - 1/16/2013 11:56 PM   
gene6029


 

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Status: offline 		Another vote for the JB Weld!! I have used it for years on my planes & on my helicopters with zero problems.....Gene

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RE: Making a CF/steel rod rudder pushrod. - 1/17/2013 9:01 AM   
John 38


 

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Status: offline 		If the wire is reasonably tight fit in the carbon tube, I have used cyano - thin - as it also wicks into the carbon and prevents the end of it splitting. If wire slightly slack, I bend it slightly to cause it to friction fit into tube.
john

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RE: Making a CF/steel rod rudder pushrod. - 1/17/2013 2:14 PM   
karolh


 

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Status: online 		Thanks guys

Karol

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RE: Making a CF/steel rod rudder pushrod. - 1/17/2013 3:30 PM   
Villa



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From: Wilson, NC,
Status: offline 		Hi karolh
In a similar application I found that sometimes the carbon rod would split under the steel rod. The rods I had have carbon fibers that only ran parrallel to the center of the rod; there was no fiber in the direction of the circumference of the carbon rod. Now I rough up the steel rod with sandpaper, put epoxy on the rod, insert the steel rod, then I take some ordinary sewing thread and wrap it around the carbon rod end 5-6 times to prevent the rod end fron splitting. I cover the the thread with epoxy.

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