I am about to set-up a pull pull system on the rudder of my H9 1/4 scale Cap 232. I am using the Du-Bro 4-40 pull-pull kit.


However, I don't have the small crimp tubes (the small steel cylinders) anymore, to crimp the lines. Can I safely use small pieces (say 3/8" long) of brass fuel tubing to do the same job? Also, can I use a pair of vise-grips to safely secure the brass tubing?

Thank you,

Go to the hobby shop and buy a piece of copper tubing about the same diameter as your brass fuel tubing. the copper is more maleable (sp?) - it bend and cuts easier.

for a neat cut, roll the tubing back and forth under an xacto knife blade on a hard surface. Then debur the inside edge of the tube with the tip of a #11 blade. A sharp xacto blade cuts the copper very nicely.

Instead of cutting small tube.....I used the Fishing supply....small tube already cut, they use this to cramp wired go figured...

Daniel D.

HI Maxime, yes to your question.

Thank you !

I would suggest you stay with the steel. It will form a more secure connection than brass, which is much softer. Your choice.

You may be able to get steel tubes of the correct size at a fishing supply store. Probably in a steel leader kit or such.

Thank you for the suggestions. I went ahead and used the brass fuel tubing method, and it seems to hold well.


Well I guess I will not be able to test the machine this year... I just received a phone call: new job, Astar 350 pilot!!! (full scale helo).


YIPPPPPPEEEEEEEEE!!!!!!!!!!!!