[TowerTalk] Mystery Tower

[David Gilbert]

I'm pretty sure both are required.  The fins would have the same 
leverage as a concrete base, but without the weight of the concrete 
there is nothing to hold them to the soil for that leverage to do any 
good.  It's a pretty easy vector analysis problem to prove it.

73,
Dave   AB7E



On 7/16/2013 3:19 PM, Rick Karlquist wrote:
>
>
> It seems like a large enough set of fins would give the same
> resistance to overturning vs PSI rating of the soil compared
> to concrete, but it doesn't have the weight of the concrete.
> I've always wondered whether the massive weight of concrete
> isn't the real thing holding up the tower as opposed to the
> resistance of the soil.
>
> Rick N6RK
>