cf tubes

[Jim_Woodward at beaerospace.com]

I use a couple of layers of 1/32" or so ply on the inside of of the carbon 
tube.  Drill it a little undersized and run a screw through it.
Jim W.





"Lance Van Nostrand" <patterndude at comcast.net>
Sent by: discussion-request at nsrca.org
06/27/2004 02:39 AM
Please respond to discussion

 
        To:     <discussion at nsrca.org>
        cc: 
        Subject:        Re: cf tubes


I've never put a screw or anyting in my stab tube.  Just made sure the 
front rod that the adjusters clamp has notches, not flats to the end of 
the bar.  this prevents the stab from sliding out.
--lance
 
----- Original Message ----- 
From: Keith Black 
To: discussion at nsrca.org 
Sent: Sunday, June 27, 2004 12:05 AM
Subject: Re: cf tubes

The PVC sounds like a pretty good idea, at least for the main wing tube. 
 
For my CF stab tube I used a very short length of a dowel that was just 
the right size to fit the inside of the CF tube. Before inserting I 
drilled a hole length wise through the dowel to lighten it. I then glued 
the dowel in place and drilled and tapped the hole for the 4-40 screw. 
This work just fine and since the tube is so small in diameter the weight 
is pretty insignificant.
 
Keith Black 
----- Original Message ----- 
From: Ed Deaver 
To: discussion at nsrca.org 
Sent: Saturday, June 26, 2004 10:51 PM
Subject: Re: cf tubes

Will try this. 
 
What size PVC do you use for the stab tube? 
 
Thanx
 
ed

John Ferrell <johnferrell at earthlink.net> wrote:
I prefer the PVC alternative.
1- Slice a ring (about 1/4 inch) from a slightly oversized piece of PVC 
tubing.
 2- cut a segment out of the ring (about 1/4 or 3/8 inch) so that you can 
compress it a little and slide it inside the tube. 
 3- drill a little undersize, sharpen a screw to make it self tapping. 
 
Cheap, easy to replace, field repairable (rotate the ring & re-tap). Also, 
the PVC does not seem to allow a loose screw to come out. 
 
John Ferrell    
http://DixieNC.US
----- Original Message ----- 
From: Ed Deaver 
To: NSRCA Disscussion 
Sent: Saturday, June 26, 2004 5:32 AM
Subject: cf tubes

To save weight, I am switching to the PBG CF wing and stab tube.  In this 
plane I already have a 4*40 bolt in the wing and stab as my fastening 
method.
Can you drill and tap these tubes successfully wicked with thin CA after 
tapping?  Realize the stab tube will only be taken off rarely.  One of the 
wing bolts will be removed on a regular basis.
Or, do I have to glue a piece of ply to the inside of the tubes and tap 
that?
Before it comes up, I do not want to change my mounting system unless it 
absolutely needed.
Thanx in advance.
ed

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