>> that could beused for about 75 feet of 55G or 65G that would
>> telescope into about the
same length of larger tower (33 inch face, 3 inch legs), probably using
an extra large prop pitch to raise and lower for 48 hours a few times a
year dependent on good weather :-) ?
>>
> As for the prop pitch motor, some of the older ones properly geared
> certainly could do the job, but regardless of what you use I'd want
> some thing with readily available parts, or a spare unit on hand that
> could easily and quickly be interchanged with the other. One thought
> is a winch like they use on the front of 4 wheelers when "mudding".
>
> Good luck in what ever use you put it.
>
Those winches don't have very good duty cycle behavior. This is going
to be BIG and HEAVY. I'd get a real AC motor with a suitable gear box.
Say it weighs 1000 pounds and you want to push it up 60 feet. A 1 HP
motor will push that up in about 2 minutes, with no loss (1 HP =550
ftlb/sec). Obviously, there will be a fair amount of loss. Either
you're geared so it's like 10-15 minutes to crank up, or you're looking
at a 5 HP motor. (counterweighting might be reasonable.. The lower
section is going to have beaucoup compressive strength, so carrying
twice the mass of the upper section won't be a problem.
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