Bert,
I use to own a Versatower and it had a single lock at the twenty foot
level. This takes most of the load and released the load from the winch
entirely. I have two other towers made by the former UK Westower company,
which are heavier duty. One three section tower is capable of 112 feet when
fully extended. Both towers have a single lock though I placed stainless
steel bars between the third and second section to remove the continuous
strain from the upper wire rope. Now this is possible as a reasonable
amount of the bracing is made of heavy duty flats say 25mm (1") wide x 8mm
(1/3") thick. One could probably not do this with the round cross bracing
as it would bend. One of these towers is in use forty years and the other
thirty-three years with out incident.
The larger of these two towers was used at 88 feet for many years but
has since been lowered to 80 feet as I am conservative. This larger tower
is designed for stays. The smaller 58 foot tower is not stayed.
The lock which came with these towers consists of a counter weighted
steel flap which drops in place as the tower is raised. To lower the tower
one cranks up a couple of inches and pulls a cord which disengages the lock.
While lowering the tower, the lock is kept disengaged by continuing to pull
the cord. Let go of the cord because of a problem and the steel plate
falls back into place.
73 Doug EI2CN
-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of Bert
Almemo
Sent: 15 June 2013 18:07
To: 'Ian White'; towertalk@contesting.com
Subject: Re: [TowerTalk] How to apply lube to HDX589
Hi Ian,
I beg to differ with you. I have two friends with Versatowers in Sweden and
they both have locks on all sections - one 3 section tower and the other 4
sections.
Maybe the towers are delivered with only on lock but you can buy them
separately and install on the tower yourself.
73 Bert, VE3NR
-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of Ian
White
Sent: Saturday, June 15, 2013 1:48 PM
To: towertalk@contesting.com
Subject: Re: [TowerTalk] How to apply lube to HDX589
>
>A locking device would cost about $ 20.00 a section. I don't think that
would
>turn off a potential buyer. If they can do it in Europe, why not on
this side of
>the pond?? The market for crank-ups is probably bigger here.
>
>73 Bert, VE3NR
>
Versatowers have only one locking device, a simple flapper plate at the top
of the lowest section. The second section rests on this plate to take the
strain off the winch cable after the tower has been extended, but all of the
higher sections are still hanging on their cables and pulleys.
73 from Ian GM3SEK
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