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Re: [TowerTalk] Tower-climbing pictures

To: "'Rex Lint'" <>, "'Alan NV8A'" <>, "'TowerTalk'" <>
Subject: Re: [TowerTalk] Tower-climbing pictures
From: "John E. Cleeve" <>
Date: Fri, 23 Jul 2010 22:54:09 +0100
List-post: <">>
Hello Rex,

        The air accident details are contained in a book called
"Communication Structures" written by Brian W Smith, and published by Thomas
Telford. ISBN 978-0-7277-3400-6.  A real "bible" for those involved or
interested in the erection and maintenance of professional radio/TV masts
and towers.

        However, I was wrong about the mast location; the small plane
incident was not in the USA, but the UK. The picture is fig 4.5 on page 66
of the book, and it shows a small biplane buried nose first into a 750ft
high mast at Dover. The text on page 65 says "It is believed that the pilot
survived and climbed down the mast to safety". 

        Had the mast been a vertical radiator, and being fed with the usual
many kilowatts output from a BC transmitter, then the pilot would have
received very painful RF burns, if not death, as he lowered one foot to the
grounded area at the base of the mast, whilst clinging on to the mast
structure, unless perhaps he jumped the last ten feet or so.

        Another example shown on page 67 of the book is a portion of a wing
left behind by a jet fighter, which flew too close to another high UK mast,
and struck one of the guy supports. It does not say what happened to the
aircraft or pilot in this incident. These reports are contained in Chapter 4
"Failures of Masts and Towers" 4.5 "Aircraft damage".

        The book is very interesting reading Rex; perhaps you can find a
copy over there....73, Sincerely, John. G3JVC.


-----Original Message-----
[] On Behalf Of Rex Lint
Sent: 23 July 2010 19:53
To: 'John E. Cleeve'; 'Alan NV8A'; 'TowerTalk'
Subject: Re: [TowerTalk] Tower-climbing pictures

Let's say it WAS a vertical radiator.  What's the danger?

       Rex Lint
       Merrimack, NH

-----Original Message-----
[] On Behalf Of John E. Cleeve
Subject: Re: [TowerTalk] Tower-climbing pictures

        I have also seen photograph of a light aircraft, where the pilot
buried its nose into a high lattice structure some where in the USA, and the
pilot climbed out and down the mast to safety, how fortunate for him it was
a mast, and not a vertical radiator.

        73, John, G3JVC.


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