Carbon Push Rod Size

[Troy Newman]

Actually the pushrods I use on the elevator are a 0.070" CF rod it is solid not a hollow tube. This is where I use the BVM stainless connectors. These rods are solid and are run parallel down the fuse to the elevator 1/2's This is a solid light and easy way to run elevator pushrod setups.

I did a write up about a year ago on the system and you can find it on the rcaerosport.com website and also Don Ramsey's website. It shows pics and gives the part numbers and where to get the pushrod setup parts.

These are not the pushrods sold by Central Hobbies...However I use the Central Pushrods exclusively for everything else. These are the absolute best available. In fact I use the central pushrod setup to connect the dual elevator pushrod to the servo side.

For pushrods on the Ailerons the Central Hobbies 5/32" pushrods with the 2-56 or 4-40 Titanium ends are great. I have used these for a really long time...Like since 98'.   I have thousands of flights and zero failures. I have never even heard of a failure except in an extremely long runs of the pushrods being unsupported...In these cases it was a poor install and harmonics issues. My personal opinion is the rod runs more than about 10-12" it needs to be supported.

I just started using the 1/8" pushrods with the 2mm titanium ends. This are super light and have been very very solid. Again same system of rods and ends and I don't see any issues even though I have only a few flights on the smaller pushrods.

The Central Pushrods are actually hollow tubes...and the sizes are the O.D. The titanium ends get epoxy, JB Weld, or Thick CA inside of the tubes.


I actually use thick CA on all the ends and have not had any problems. I make sure its coated well and then don't use any kicker...

I feel the JB weld or 30min epoxy would be a less critical install. Although I have never had the CA fail, I can see where the quicker drying CA could not get good coverage. The slower set stuff is probably easier to work with...just takes more time to cure up.


Troy Newman

  ----- Original Message ----- 
  From: jim ivey 
  To: discussion at nsrca.org 
  Sent: Sunday, February 29, 2004 6:04 PM
  Subject: Re: Carbon Push Rod Size


  John

  The 2-56 size works good,however I use the pushrod ends from Bob Violet Models part number BVM5734.These are stainless steel and are way stronger than Dubro.You need to drill them to fit a little oversize for the carbon fiber rod.This gives room for the epoxy.

  This info is compliments of Troy Newman. Didn't think I would take credit for it did you Troy?HAHA.



  Jim Ivey






  jivey61 at msn.com 
  >From: john tarpinian 
  >Reply-To: discussion at nsrca.org 
  >To: discussion at nsrca.org 
  >Subject: Re: Carbon Push Rod Size 
  >Date: Sun, 29 Feb 2004 15:23:55 -0800 (PST) 
  > 
  >The 1/8 cf tubes are only available with 2-56 ends. 
  >Are the 2-56 linkages durable enough? 
  > 
  >--- ronlock wrote: 
  > > I'll second the recommendation for a pushrod guide. 
  > >   I cut an oval hole in bottom about 
  > > 5 x 2 inches to work through to install the balsa 
  > > and foam guide. 
  > > 
  > > Later, Ron Lockhart 
  > >   ----- Original Message ----- 
  > >   From: Lance Van Nostrand 
  > >   To: discussion at nsrca.org 
  > >   Sent: Saturday, February 28, 2004 2:20 PM 
  > >   Subject: Re: Carbon Push Rod Size 
  > > 
  > > 
  > >   Hi Moose Boy, 
  > >   The 1/8" CF rods are really nice for the ailerons. 
  > >  Very stiff and light, but make sure you use light 
  > > clevis/control arms too or it will not buy you much. 
  > >  Not sure what the elevator setup is on the Focus. 
  > > If it's down the middle, the 5/32 and 3/16 rods are 
  > > both very light and work fine.  a guide inthe center 
  > > of the rod is not a bad idea.  This doesn't have to 
  > > be structural.  Just something to prevent 
  > > oscillations, like a cross brace of light balsa with 
  > > a small cube of foam glued on top of it.  the foam 
  > > would have a slice halfway through which the rod 
  > > slides in. 
  > >   --Lance 
  > > 
  > >     ----- Original Message ----- 
  > >     From: Michael Laggis 
  > >     To: NSRCA 
  > >     Sent: Saturday, February 28, 2004 11:11 AM 
  > >     Subject: Carbon Push Rod Size 
  > > 
  > > 
  > >     What size Central Hobbies carbon pushrods should 
  > > I use on my Focus.  The homemade ones from the 
  > > previous owner don't give me a warm fuzzy.  These 
  > > push rod will be for the ailerons, and elevator 
  > > halves. 
  > > 
  > >     Thanks 
  > >     Michael Laggis 
  > >     AKA Moose Boy 
  > >     NSRCA 3618 
  > >     http://www.alaskarc.org 
  > > 
  > 
  > 
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