my turbine has been up for 1.5 years, and i have yet to have to untwist the cable. granted i use 6/3 SO cord down the tower. i check it every so often by unweighting it upon the tower exit, and it never has any noticeable twist in it. my tower gets above the trees, so it's more or less laminal air flow. i've read about more turbulent sites that need un-twisting every few months... i'm guessing i may never have to untwist my cable...
wind turbines take maintinence, period. weather it be painting blades, rebalancing blades, adjusting the air gap, retensioning guy lines, re-tourqueing bolts, adding loctite, recoating the tail, adding grease to the yaw and furl bearings, ect... so what the big deal of adding a simple untwisting to the maint. schedule??
adam