HobbyKing.com New Products Flash Sale
Reply
Thread Tools
Old Mar 03, 2011, 05:31 PM
Registered User
Upvector's Avatar
Hamilton, CANADA
Joined Sep 2009
339 Posts
Discussion
carbon push rods in teflon tubing for Supra

Gents..(hope this is the appropriate forum)
We are in the process of attaching the stab and rudder push rods in our
booms for a Supra. The supposedly bondable teflon we received does not like
the prescribed method of using CA to stick to the inside of the carbon boom. We are in contact with CST to inquire what might have happened.. In the mean time we are searching for another source.

Just noticed that Barry Kennedy sells just what we need, but his listing did not include lengths.
Question is, has anyone received this from Barry, ?? and what lengths were the carbon rods..? (sorry ..two questions)
.. and a third one, did the bondable teflon tubing work ok..

Many thanks for any response

Ray
Upvector is offline Find More Posts by Upvector
Reply With Quote
Sign up now
to remove ads between posts
Old Mar 03, 2011, 08:37 PM
Now fortified with carbon
DLGjunkyard's Avatar
Canada, ON, Puslinch
Joined Apr 2010
2,733 Posts
Kennedy would be my last choice.
http://www.rcfoam.com/index.php?cPat...a095ab6a1d6a44
DLGjunkyard is offline Find More Posts by DLGjunkyard
Reply With Quote
Old Mar 04, 2011, 06:39 AM
Registered User
Milwaukee G Mitchell, Wisconsin, United States
Joined Mar 2002
757 Posts
OR, use the tubing you have and secure it with thinned goop.
Bondable tubing becomes non-bondable as it ages.

A small amount of goop in a jar with thinner, thinned down to syrup consistency.
If on the outside, use a small paint brush to apply.
If on the inside of the boom, thin it bit more and, holding the boom vertical, apply it to the tubing and let it wick down just like CA. I use a metal pushrod and some magnets to hold it to the inside of the boom.

It's not instant bond like CA, but it's very strong and forgiving once dry.
davekra is offline Find More Posts by davekra
Reply With Quote
Old Mar 04, 2011, 07:23 AM
Now fortified with carbon
DLGjunkyard's Avatar
Canada, ON, Puslinch
Joined Apr 2010
2,733 Posts
un-etched teflon tubing can be bought here http://www.smallparts.com/s/184-5871...ubmit&x=23&y=9

And LOCTITE 770 primer prepares the teflon to except glue [ca]

NOTE teflon tubing that has been etched [kennedy`s] doesnt stay etched long in fact if its old stock even if will resist gluing .

Its never suggested to etch it yourself but you can if you do a search the info is there.

I bought a roll of teflon and a bottle of loctite and have enough for 20 gliders.

I have also used goop as Dave mentioned but as for myself if I was to use goop I wouldnt use it inside the boom because I just seem to make a mess with the stuff
DLGjunkyard is offline Find More Posts by DLGjunkyard
Reply With Quote
Old Mar 04, 2011, 09:17 AM
Registered User
Upvector's Avatar
Hamilton, CANADA
Joined Sep 2009
339 Posts
Dave and DLG... that's terrific.. thanks so much
On the learning curve for this build, this part was the most dissapointing
and left us slightly more bald at the end of the day.

Two more great solutions, and memory bank data from you both.
Thanks .. a gain
Ray
Upvector is offline Find More Posts by Upvector
Reply With Quote
Old Mar 04, 2011, 09:18 AM
Duane
Wazmo's Avatar
No. VA
Joined Nov 2004
1,439 Posts
Another trick is to wrap the tubing with heavy thread (Kevlar works well for this, if you have it), securing the ends with a tiny drop of CA. You can then glue the thread to the structure.
Wazmo is offline Find More Posts by Wazmo
Reply With Quote
Old Mar 04, 2011, 03:15 PM
Make Flying Fun
KevinSharbonda's Avatar
United States, MD, Lutherville-Timonium
Joined May 2003
1,473 Posts
Email Rck at Tailbooms dot com he sells the real etched!
http://www.tailboom.com/teflon.php
KevinSharbonda is offline Find More Posts by KevinSharbonda
RCG Plus Member
Old Mar 04, 2011, 05:49 PM
Registered User
Upvector's Avatar
Hamilton, CANADA
Joined Sep 2009
339 Posts
Hi Waz
I think my build buddy saw your response before I did, I was just over there and he had done exactly as you describe... and it was the cats pyjamas.. I have a lot of faith in PU glue and tried the same test... 10 minutes after, I checked to see the PU has slid off of the teflon and onto the boom, but as it takes about 24 hours to set, we'll reserve final judgement until tomorrow.. but I'm pretty sure your description is what we'll use.
Thank you for that.

Kevin... thank you for the link, and we have put in the order for the the 'real etched'

Man.. we'd be making high tech ashtrays if it wasn't for lads like yourselves in this
group.

Thank You
Ray
Upvector is offline Find More Posts by Upvector
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Discussion Found some carbon fiber tubing in the shop...need some glider plans for it! jyymbo Free Flight 11 Oct 08, 2010 06:27 AM
Discussion Pull-Pull / Spring-Pull / .8mm CF Pushrods in stretched, etched teflon tubing Dale Thompson Hand Launch 12 Oct 03, 2010 07:53 PM
Sold Fuel Tanks, Motor Mounts, OS glow plug, push rods, fuel tubing - all for $19 shipped DrAGen Aircraft - Fuel - Engines and Accessories (FS/W) 2 Jul 16, 2008 03:53 PM
Help installing Teflon tubing and carbon rods Ninjak2k Hand Launch 4 Feb 04, 2005 08:11 PM