I note there appears to be two different designs of the bracket that will install on the hinge pin --- one that is installed in the pictures and the other displayed held in a hand.
The installed part appears to move the center of the brace wire slightly closer to the center of rotation of the stablizer and allows more room for the elevators to rotate.
Which one is the probable replacement part?
Bill
Keep up the great work and information Randy as very helpful. After dealing with everyone at CC since 2007 I am one who has total faith in all you guys to resolve this the best way and quickly. Standing by ready to fly when you announce the fix. Best Gary
I assume the reason engineering doesn't just go to the Top Cub, EX and PA-18 type tail feathers and wire system is because you want to develop a fix for the tail feathers for all of the existing Carbon Cubs out there without changing tail feathers also? There must be a million hours on PA-18's with that system.
Flying Carbon Cub EX #11 since 2011
Good news. Plenty of good flying weather still here in the mid Atlantic.
Sent from my iPhone using Tapatalk
Michael D
N606RJ
#3
I would like to give a short update with respect to SA009. Last Saturday we completed flight tests with the three options under consideration. The data from these tests is being analyzed. There are several criteria that drove us to these designs. First and foremost is to ensure that the loads in the wires are such that the problem will not repeat itself. Flight tests have included typical operations and a comprehensive series of maneuvers. The next consideration is that the modification can be installed safely- we know that many of you are excellent craftsmen and aircraft mechanics, but we do have to anticipate that someone with less than average skills is going to be doing the work. We also placed importance on producing a design that will be quick and relatively straightforward to install. Finally, and by no means less important, is that the kit can be manufactured quickly to ensure that our customers will be in the air as soon as possible. We are very grateful for your patience and understanding.
Please Santa all I want for Christmas is to be able to go flying in my Carbon Cub.
Thinking out loud here again. The reason that the tention doesn't change much is because as the front of the stab moves up it should tighten the top wire as the stab spar rotates the hinge down. But as the top wire is getting tighter the bottom wire is getting looser. Have you tried laying a 5' straight edge on the rear spar while running the trim up and down full range to see if the spar deflects in the area of the hinge/wire attach point? If the wire are staying close to the same tention then something is moving to allow that to happen.
The new style hinge bracket with the Piper style brass barrel and clevis will let the wire float on the hinge bracket so it doesn't get torqued like the old bracket did.
I hope Santa answers your wish.
Glenn
Last edited by Cubdriver2; 12-10-2013 at 02:57 PM.