Brodhead Pietenpol Association

Original Posted By: Steve Eldredge
Subject: Pietenpol-List: Control system pulleysI'm about done with the left wing on my Piet (3-pc wing) and ready to install the pulleys that reroute the aileron control cables from parallel to the spar out to the aileron horns. I got ahold of 4 3" phenolic aircraft pulleys, but they appear to be too large to fit inside the wing at the angles needed. I understand that there is a minimum recommended pulley diameter for a given cable size .. I plan on using 3/32 cable... but I can't find anything in any of the Tony Bengelis books I have or any of the other reference materials I have. Anyone have those specs? What size pulleys are commonly used for this?Matt Paxton________________________________________________________________________________

Original Posted By: owner-pietenpol-list-server(at)matronics.com
I used 1/8" ss cable and used 2" pulleys everywhere. I ran into the sameproblem as you described, but never found a difinitive answer to the minimumpulley diameter for a specific cable size.Steve e.-----Original Message-----

Original Posted By: "Carl Loar"
Reference Tony's book "The Sportplane Builder" page 126 on pulleys.Dick G.________________________________________________________________________________

Original Posted By:
Matt,,,,, Two inch pulleys should do it,,,, for 1/8 and 3/32 cable.Carl----- Original Message -----

Original Posted By: "Conoly"
Matt, I don't think I would use 3/32 for primary. Go to 1/8. I think a 2"is good enough for 1/8. Call me, we need to talk/get together. I will beflying the Travel Air this weekend. You should come up.________________________________________________________________________________

Original Posted By:
Matt .Aircaft Spruce and Specialty catalogue (page 135 )has some info on whatpulleys should be used for certain size cables and what pulleys can be usedfor what angles (cable angles). Also the Tony Bingelis book has a sectio0non pulleys and when to use certain ones as well as fairleads and their use.II can't remember exactly where I got my info, but I could dig it up.E-mail me if you need more info. Good Luck,Cheers, Bert----- Original Message -----

Original Posted By: jared wilkinson