Author Topic: What size CF tube for control rods (Read 1445 times)

RknRusty · « **on:** December 17, 2013, 07:38:48 AM »

Sorry to skip the search, but I'm on the fly, near the hs, and my go-to forum is down.
What size cf tubes and music wire for 1/2A and .35 size control rods?
Thanks

Rusty

RknRusty · « **Reply #1 on:** December 17, 2013, 08:39:50 AM »

Well, I bought .098" ID CF tube. It has more wiggle room with 1/16" wire than I like, but with a little V bend to snug the wire, JB Weld should hold it. Hope y'all approve.

Rusty

Tim Wescott · « **Reply #2 on:** December 17, 2013, 10:02:12 AM »

I hope that's for the 1/2-A models.

The question is one of those whose best answer is "it depends". I tend to use 5mm or better OD arrow shafts for big models, and 3mm OD tube for my 1/2-A models. But I had a Fancherized Sig Twister for a very productive few months (before I stupidly crashed it) that worked great with 4mm OD rods.

I decide whether a rod is stiff enough by pressing the ends together -- if the rod bows enough that I can feel it get springy, then I use something bigger.

RknRusty · « **Reply #3 on:** December 17, 2013, 10:29:06 AM »

Quote from: Tim Wescott on December 17, 2013, 10:02:12 AM

I hope that's for the 1/2-A models.

The question is one of those whose best answer is "it depends". I tend to use 5mm or better OD arrow shafts for big models, and 3mm OD tube for my 1/2-A models. But I had a Fancherized Sig Twister for a very productive few months (before I stupidly crashed it) that worked great with 4mm OD rods.

I decide whether a rod is stiff enough by pressing the ends together -- if the rod bows enough that I can feel it get springy, then I use something bigger.

This is 4mm OD x 2.5mm ID, so the wall is 1.5mm thick. I do have a 1/2A use for it, but I was hoping to use it on the Sterling Yak-9. It feels pretty stiff, but I haven't cut it yet so it's hard for me to tell. I'll decide when I do the springy bow test. Thanks, Tim.

Rusty

Tim Wescott · « **Reply #4 on:** December 17, 2013, 06:56:05 PM »

Quote from: RknRusty on December 17, 2013, 10:29:06 AM

This is 4mm OD x 2.5mm ID, so the wall is 1.5mm thick. I do have a 1/2A use for it, but I was hoping to use it on the Sterling Yak-9. It feels pretty stiff, but I haven't cut it yet so it's hard for me to tell. I'll decide when I do the springy bow test. Thanks, Tim.

Rusty

0.75mm -- remember that as you go through the middle of the tube you hit the wall twice.

That should work just fine.

RknRusty · « **Reply #5 on:** December 17, 2013, 08:59:00 PM »

Quote from: Tim Wescott on December 17, 2013, 06:56:05 PM

0.75mm -- remember that as you go through the middle of the tube you hit the wall twice...

Uh, Duh, yeah.

It's measuring mistakes like that that keep me from being an expert builder. Measure 4 times, cut once, throw it in the trash.

Phil Krankowski · « **Reply #6 on:** December 19, 2013, 06:57:49 PM »

Quote from: RknRusty on December 17, 2013, 08:59:00 PM

Uh, Duh, yeah. It's measuring mistakes like that that keep me from being an expert builder. Measure 4 times, cut once, throw it in the trash.

Sounds like you need to do more draw a picture first, then draw how you will measure the picture. Make a mock-up if necessary...

reminds me of physics class $:-\$

Phil

Author Topic: What size CF tube for control rods (Read 1445 times)

RknRusty

What size CF tube for control rods

RknRusty

Re: What size CF tube for control rods

Tim Wescott

Re: What size CF tube for control rods

RknRusty

Re: What size CF tube for control rods

Tim Wescott

Re: What size CF tube for control rods

RknRusty

Re: What size CF tube for control rods

Phil Krankowski

Re: What size CF tube for control rods