[TowerTalk] misaligned vertical towers

[Brian Alsop]

Once the discussed towers are measured, it would be interesting to know
what the conclusions are.

The eye is easily fooled with regards to verticality.  Even the Romans 
knew this.  The columns to their buildings were tapered to be more 
narrow at the top to appear vertical and parallel.  Otherwise the eye 
would tell one they are tilting in towards one another.

73 de Brian/K3KO
On 3/24/2013 16:01, Mark Robinson wrote:
>
> ----- Original Message ----- From: "Don Moman VE6JY" <ve6jy.1 at gmail.com>
> To: "TOWERTALK at contesting. com" <TOWERTALK at contesting.com>
> Sent: Thursday, 21 March, 2013 4:05 PM
> Subject: Re: [TowerTalk] misaligned vertical towers
>
>
>> Simple - make your own vertical "standard" with a plumb bob suspended
>> from
>> something (a step ladder perhaps) out maybe 50 or 100 feet away from the
>> base and that will tell you which is vertical....
>>
>> 73 Don
>> VE6JY
>>
> .com/mailman/listinfo/towertalk
>
>
> That is how I did it as well..I set up two ladders with a wooden arm
> clamped to each. I hung a plumbob from the end of the arm.....the plumb
> bob was a wrench in a bucket of water to damp out any oscillations.
> Choose a still day. I lay on the ground and  supported my head with my
> arm. By rolling my eyes from the bottom to the top of the tower,  I was
> able to judge the plumb to within half the thickness of the tower
> vertical members.
>
>
> Mark N1UK
>
> _______________________________________________
>
>


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