In a message dated 4/23/03 2:17:20 PM Eastern Daylight Time, w9sn@comcast.net
writes:
> The top bracing between the rotor and the thrust
> is made of 2 inch heavy channel steel. The aluminum would certainly
> twist before this would.
What bracing? There is none in the pictures.
The bottom legs are made of 3 inch heavy
> channel steel. (weighed almost 100 lbs each.) There are 3 cables that
> support the tower with the first one being on the winch. The winch will
> not take the load all the time.
Are all sections moving out at the same time? Lower section is pulling out
next one?
I have made a small piece of steel that
> I slide into the tower between the bottom of the second section and the
> aluminum heavy channel bolted to the face of the bottom section, 5 feet
> down from it's top.
How do you get there? You claim tower while extended and supported by winch
"that will not take the load?"
What happens if you get sudden winds or icing?
> The two upper cables will take the load. And they
> are only supporting about 400 lbs without antennas. They are stainless
> heavy cables.
You better make sure that your winch and cables can take all the load and
some more ALL THE TIME. That's the purpose of crank-up tower and to have
ability to raise and lower it any time it is NEEDED.
Looks like the safest use for this tower would be to use it as a adjustable -
tunable vertical for 40 - 160 m.
No answer to design loads or any calculations? Previous user?
This not professional advice, just opinion based on what was seen in the
pictures and mentioned in postings.
Yuri, K3BU
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