[TowerTalk] OK for Rohn 45 Tiltover - Dutton-Lainson 2500?

[kd4e]

>> Can anyone explain, in laymen's terms, why there is a 1,000lb
>> difference in "MAX LINE PULL" capacity between the "1st Layer"
>> and a "Full Drum" as well as what that means in actual use?
>>
>> MAX LINE PULL 1ST LAYER 2500 lbs.
>> MAX LINE PULL FULL DRUM 1500 lbs.
>>
>>
> It means that when the drum is empty you can pull 2500 lbs. with the 
> winch. When the drum is full of cable you can only pull 1500 lbs. with 
> the winch.
> You have more mechanical advantage with an empty drum than with a full 
> drum. In other words the full drum has a longer lever pulling on the 
> cable than it has with the empty drum so it takes more effort to turn it 
> with a full drum. The gears have more stress on them with the full drum.
> 
> Think of the cable at the drum attached to a lever that is say 3" long 
> with a full drum (6" diameter drum of cable). With an empty drum that 
> lever that the cable is attached to will be only a 1/2" long or so 1" 
> diameter drum now.
> 
> 73 Gary  K4FMX

Why couldn't you had been my math or science teacher in
high school?

You nailed it so I could understand it on the first try ...
I still have trouble with algebra and geometry!

Years ago someone had to try three times to explain how
to calculate the amount of cable on a reel using a formula
I have forgotten but that (I think) included the number
of turns across the outer face, the depth of the turns,
the diameter of the reel, and square root something-or-
other!

;-)

-- 
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Thanks! & 73, doc kd4e

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