Brodhead Pietenpol Association

Original Posted By: Michael Weston
Hey Mike,A dull "thwang" is the basic advice I received when I asked. It's hard toquantify many things on a Piet and this seems to be one of them. I thinkgood common sense dictates here, so here's some basic common sense things toput into the mix.1. it's a wood structure so the cables shouldn't exert unnecessaryforce.2. the tail group is in the prop wash and really want a lot, so youdon't want the cables to allow for ANY movement.3. the tail alignment makes HUGE differences to your final trim, so thecables need to be easily adjusted during initial trim-inI think the main thing is to have them tight enough so nothing that move,and that they all be the same tension.I sat in on a lecture at Brodhead where the speaker talked a lot about tailalignment and the value of taking a lot of time in ensuring that everythingis square, including taking a measurement from the center of the fusesomewhere up front and ensuring the horizontal stab is exactly square asviewed from above. I worked hard to do this and she never needed a singletweak.Douwe________________________________________________________________________________

Original Posted By: "taildrags"
I don't have anything useful to offer here, but the tail surfaces on my airplanehave the cast Vi Kapler hinges rotating on clevis pins secured by cotter pins.My comment about them is that they are possibly the most difficult and frustratingcotter pins to install on the entire airplane. The space in the controlsurface gap is limited and it's difficult to keep the clevis pin from rotatingwhile you try to spread the legs of the cotter pin, and proper cotter pininstallation requires that you clip back the legs... which gives you even lessleverage to spread them and then fold them back around the clevis pin.It's a job best done with two people, and preferably one or both persons will havesmall hands. And finally, if you do it right the first time, you'll onlyhave to do it once. I've done it more than once.--------Oscar ZunigaMedford, ORAir Camper NX41CC "Scout"A75 powerRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: tail brace cables