Size of push-rod cables...???

[intheswamp]

Quick, short question...(I know, it's hard to believe a short question coming from me. :D )

What size push-rod cables should be used in an Oly II?

3m Gnome?

Any recommendations...Sullivan? Dubro? Composite? Steel?

Would this work? Sullivan Push Cable .032 & Golden Clevis 30'
http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXFV00

Need to order a couple of items and thought I'd get these for the "supply bin"....nope, won't be building anytime soon (I've got some more GL flying to do!)...just planning ahead. ;)



Ed
Intheswamp... :Dning

[Sparky Paul]

I have a lot of .012" control line wire I use for pull-pulls on everything.
Some of mine use Kevlar, but I'm all out of that, can't find any more in a reasonable amount or price.
15 pound or so fishing line works well.

[Thermalin]

Just realize that .032 is on the large side for discuss launch gliders but usable... so it's quite thin. Just tack it all the way along the fuse (support) if using in a larger plane.
Mike

[intheswamp]

Just realize that .032 is on the large side for discuss launch gliders but usable... so it's quite thin. Just tack it all the way along the fuse (support) if using in a larger plane.
Mike
I have a lot of .012" control line wire I use for pull-pulls on everything.
Some of mine use Kevlar, but I'm all out of that, can't find any more in a reasonable amount or price.
15 pound or so fishing line works well.

I appreciate the responses. The cable will be used primarily in 100" and larger planes and I want to make sure that the cable is stiff/rigid enough but yet not over-kill. I've got a couple of pieces of .025" cable that seems to me would give too much flex/slop in the open region between the tube housing and control horns. I don't like the idea of the nylon rods as I've heard/read too many negatives about them. Steel or possibly carbon sounds good.

Thanks!
Ed
Intheswamp... :Dning

[solo6796]

I really like these Sullivan Composite flex rods.

http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXFV45&P=0

They don't change length with temperature, and are very stiff and light. I use the leftover pieces for flap and aileron links, using the threaded couplers. Never solder rod ends again...

AJ

[intheswamp]

I really like these Sullivan Composite flex rods.

http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXFV45&P=0

They don't change length with temperature, and are very stiff and light. I use the leftover pieces for flap and aileron links, using the threaded couplers. Never solder rod ends again...

AJ
Thanks AJ. I really wanted to go with some carbon rods but wasn't sure about getting everything together to build them...looks like this is a good "DIY Fun Kit". Coming from you I'll take the recommendation...ordered four a few minutes ago. :)

Thanks!
Ed
Intheswamp....still :Dning

[Sparky Paul]

I appreciate the responses. The cable will be used primarily in 100" and larger planes and I want to make sure that the cable is stiff/rigid enough but yet not over-kill. I've got a couple of pieces of .025" cable that seems to me would give too much flex/slop in the open region between the tube housing and control horns. I don't like the idea of the nylon rods as I've heard/read too many negatives about them. Steel or possibly carbon sounds good.

Thanks!
Ed
Intheswamp... :Dning
.
You don't push on the cable... :)
Decent tension on both sides gives reliable tension on the pull side.
Read up on "Ackerman" to get the skinny on pull-pull.
I've been using .060" and .070" CF rods for pushrods on my latest planes..
The control runs aren't as long as yours will be. But with a few fairleads maybe 6 inches apart, the CF rods should be fine.
Much lighter than steel.

[solo6796]

I have some friends who use pull-pull type systems. To me, they seem to be very time consuming to properly set up. These are a little pricey, but you get a slop free setup that is easy to re-trim.

These composite rods are octaginal, and only the ridges are actually touching the sleeve. There is very little friction in them, even when bending out for rudder links and stuff. My Hawk and BoT uses them, but they have a bellcrank in the tail for the stab.

Save the cutoffs, they come in handy for other stuff.. I used some of the Cf inner for the anti-rotation pins on my new Yardbird.

AJ

[sierra-gold]

I really like these Sullivan Composite flex rods.

http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXFV45&P=0

They don't change length with temperature, and are very stiff and light. I use the leftover pieces for flap and aileron links, using the threaded couplers. Never solder rod ends again...

AJ

I'll cast another vote for these. Really easy to install and seem to hold their "length" well in changing temperatures. Really a good product.

SG