[SECC] Question about raising a 90' (maybe shorter) tilt-over aluminum tower

[Tad Williamson]

I've been exploring the possibilities of putting up a Universal 90' aluminum tower that tilts over at the base.  This won't happen for a while, but I am thinking about this for my property out near Eatonton.  The plan for this particular tower will be to add a horizontal "X" at the top for a capacitance hat and shunt feed it for a transmit antenna on 160 meters.
Universal's 2-90 tower weighs 259 lbs and add a few lbs for the cap hat and it should be under 270 lbs total.
Anyway, over the last few days I've been trying to figure out how to raise a tower like this.  I know once the shunt is in place, a crane can be brought out and the tower raised and it probably wouldn't need to be lowered/raised much after that.  
But I started reading about the "falling derrick" method of raising towers and masts and thought it might work, but I couldn't find any formulas to figure out the height of the derrick, length of the ropes/cables and distances between components.
Does anyone have experience with this and/or formulas to calculate the lengths/values?
 
Thanks, 73, Tad, WF4W



"What a long, strange trip it's been"
 
The Grateful Dead
 
Truckin'
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