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Old 04-01-2009, 12:12 AM
tmproff is offline
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Best Carbon Fiber Pushrod Ends

Have you guys bought any CF pushrod ends from www.connectorsRC.com ?

Do they work as well as they look? Price is half of what Central sells em for.
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Old 04-01-2009, 06:29 PM
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Re: Best Carbon Fiber Pushrod Ends

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Originally Posted by tmproff View Post
Have you guys bought any CF pushrod ends from www.connectorsRC.com ?

Do they work as well as they look? Price is half of what Central sells em for.
I'll find out. I just ordered some of your threaded rod ends.
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Old 04-01-2009, 06:34 PM
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Re: Best Carbon Fiber Pushrod Ends

This link might work better.

http://connectorsrc.com/default.aspx
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Old 04-01-2009, 06:59 PM
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Re: Best Carbon Fiber Pushrod Ends

Those are stainless as opposed to titanium. You cannot compare the prices as they are not similar. Are the insides of the ones you have grooved to help lock them to the rod? If they are smooth inside, I would always wonder about adhesion.
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Last edited by JimC-MD; 04-01-2009 at 07:00 PM. Reason: spelling
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Old 04-01-2009, 07:29 PM
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Re: Best Carbon Fiber Pushrod Ends

central hobbies
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Old 04-02-2009, 08:30 AM
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Re: Best Carbon Fiber Pushrod Ends

Quote:
Those are stainless as opposed to titanium. You cannot compare the prices as they are not similar. Are the insides of the ones you have grooved to help lock them to the rod? If they are smooth inside, I would always wonder about adhesion.
Since these pieces are so tiny, the weight difference is less than a gram. The 40 sized ones weight 1.2 grams, and the larger ones are around 2.6 grams!

The difference between inserts and capture is simple: Get a 1 inch piece of pipe (needs to be kinda heavy) and try to use 2 fingers to pick it up using only the inside of the pipe. Now try to pick it up from the outside......much easier right?

The difference is that the capture style have significantly more surface area to glue to.

Also, these protect the carbon tube ends from splitting / splintering. Grab a central hobbies pushrod from the end and try to break it out of the tube. You'll be surprised at how easy it is to split the Carbon Fiber...

Lastly, someone gave me some great advice on another website...if you would like some additional insurance with capture style....After your pushrod is finished gluing, drill a tiny hole through end and pushrod. Put a drop of thin CA in the hole and push a T pin through it. After it's dry, cut off the ends that stick out.....
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Old 04-02-2009, 09:02 PM
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Re: Best Carbon Fiber Pushrod Ends

Hmmm. Never had one fail or get loose. I also realize that the force on a PUSH rod is linear unless the geometry causes a bind. That would be poor setup. So taking one and twisting it sideways is a poor test of capability. These end look nice. Not as streamlined as others or as secure IMO.
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Old 04-02-2009, 09:57 PM
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Re: Best Carbon Fiber Pushrod Ends

Been using the titanium ones from Central Hobbies for the past 7 or 8 years and have never had a problem from 1.20 sized planes up through 40% planes. Far more 28% through 35% planes than any others. I have no need to change from what I know works effectively and without failure to save a few pennies up front. None have ever failed under any flight load.
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Old 04-04-2009, 07:33 AM
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Re: Best Carbon Fiber Pushrod Ends

I'm confident these will be just fine. I've been using threaded rod glued inside the CF tubes and then capped off with shrink tubing (for looks mainly) on planes up to 35%. With clean and sufficient length of threads inside the tube (3/4" for me) they are nearly bullet proof. The capture style will simply improve on the glue surface area more. The others, with the inside grooves, are more of a marketing thing as they will not change the failure mode ...that being shear in the glue or glue to part interface. If the glue, in the case of the grooves, is thicker it will still fail at the maximum shear strength of the glue. Surface area and, in our case, length of the glue joint is far more important than local thick spots of glue.
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Old 04-13-2009, 04:26 PM
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Re: Best Carbon Fiber Pushrod Ends

What's the best type of glue for those?
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Old 04-22-2009, 10:46 PM
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Re: Best Carbon Fiber Pushrod Ends

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What's the best type of glue for those?
I use flexible CA (CA/Rubber Tire glue for RC Cars/Trucks). I would think epoxy would be just as good. I believe some have had trouble with "hard" glues like regular CA.
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Old 08-23-2017, 03:54 PM
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Quote:
Originally Posted by guinnb View Post
I use flexible CA (CA/Rubber Tire glue for RC Cars/Trucks). I would think epoxy would be just as good. I believe some have had trouble with "hard" glues like regular CA.
which would be best if I were to use Epoxy:

A. West Epoxy Resin ( let it cure for 24 to 48 hours before I use it).
B. 30 minute Epoxy
C. 6 minute epoxy
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Old 08-23-2017, 04:53 PM
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Personally I would use something like 3M Scotch-Weld 2216 epoxy adhesive, it cures as a very tough flexible adhesive that is very well suited for applications like this.

Bob
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Old 08-23-2017, 05:30 PM
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Quote:
Originally Posted by sensei View Post
Personally I would use something like 3M Scotch-Weld 2216 epoxy adhesive, it cures as a very tough flexible adhesive that is very well suited for applications like this.

Bob
thank you Bob

I appreciate you
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Old 08-23-2017, 05:38 PM
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I've used the titanium capture ends Abell Hobby used to sell--I do like the capture/surround of the end of the carbon tube for strength. I've used JB Weld every time, and always clean first with alcohol, and also rough up the outside of the tube with sandpaper. Never had one fail
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