[TowerTalk] Fwd: [YCCC] falling derrick

[n8de at thepoint.net]

That's great, assuming you have room (and protection) for the 'derrick'.

I use the falling-derrick method to raise my self-supporting towers  
WITH antennas, etc. pre-mounted on them.  Usually takes three people:   
one to drive the pickup truck pulling the rope, second to align and  
'guide' the 'derrick', and third to place a T-support under the tower  
IN CASE it is necessary to stop before reaching full verticality.   
That third person can then insert securing bolts at the tower base  
prior to removing the 'derrick' and pickup tension!

73
Don
N8DE


Quoting Tom Frenaye <frenaye at hughes.net>:

>
> Thought this might be of interest to a wider audience.  Tom
>
>
>> From: "Jim Spears" <n1nk at cox.net>
>> To: <yccc at yccc.org>
>> Date: Wed, 16 May 2012 17:29:09 -0400
>> Subject: [YCCC] falling derrick
>>
>>
>> A housing community here in Tiverton has a 175 foot wind turbine installed.
>> It is unusual in that it can be tipped over for maintenance;  most of the
>> large ones need a large crane or helicopter.  The design uses a falling
>> derrick system to raise and lower.  Photos are at
>>
>> http://tiverton.patch.com/articles/sandywoods-farm-wind-turbine-receives-test#photo-9420062
>>
>> they have a fairly large permanently installed winch system.  I have seen it
>> in both the up and down position.
>>
>> Jim N1NK
>>
>> _______________________________________________
>> YCCC Reflector mailto:yccc at contesting.com
>> Yankee Clipper Contest Club  http://www.yccc.org
>> Reflector Info: http://lists.contesting.com/mailman/listinfo/yccc
>
> --------------------------------------------------------------------------------------------------------------------
> e-mail: frenaye at pcnet.com    YCCC  --> http://www.yccc.org/
> Tom Frenaye, K1KI, P O Box J, West Suffield CT 06093 Phone: 860-668-5444
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