Colin I have also been working on my elevator control system using push pull tubes. The tube I have installed was given to me by Gene Byrd and was used in his KR-2S prior to his crash. He had a bend in his tube which I eliminated when I cut the tube down to fit my KR-2. The tube is aluminum 7/8 OD. The ends of the tube have a progressively smaller tubes inserted and then a threaded rod end and a 3/16 bolt to secure it in the end of the tube. I also used the forks from the rod ends to the bell cranks. To see how I made the system go to http://www.jackandsandycooper.com/stickandpedals.html If you need more details I can take more pictured and post them.
Robert J. (Jack) Cooper kr2coo...@earthlink.net http://www.jackandsandycooper.com/kr2 Why Wait? Move to EarthLink. > [Original Message] > From: Colin <crain...@cfl.rr.com> > To: KR builders and pilots <kr...@mylist.net> > Date: 9/13/03 7:24:16 AM > Subject: KR>Push tubes > > Lynn and Dana, > And anyone else that posts; first thank you for all the help thus far. I truly believe that you all have saved me from a catastrophic failure of the elevator control. I do not want to sound stubborn, but there are a couple of reasons I have not abandoned the present tube. > 1. I am trying not to open up the hole any larger in the wood bulkhead that joins to the horizontal stabilizer spar. I don not know how much of this wood is critical, hence the small diameter tubing choice. > 2. Not as good a reason but, the only ends I could locate to fit directly into a tube, fit the 5/8" tubing. They are kind of a fork end that slips into the end of the tube, and then you can rivet, or drill and bolt, which I did. The cross bolt through them is also AN3, and the bolts are 90 degrees to one another just in case being inline could cause a problem?! > 3. These little fork fittings kept the push tube operating in a straight line with no side loading like a side mounted bearing looked to cause. If I centered the bearing, it would require much more machining then I have the skill and equipment to fabricate. Also hooking anything big at all up to the elevator horn in the tail is a @#$%&^ ! No Room! > Definitely need some experienced thoughts... > Thanks. > Colin Rainey KR2(td) > crain...@cfl.rr.com > Sanford, Florida > FLY SAFE!!!!_______________________________________________ > see KRnet list details at http://www.krnet.org/instructions.html
