[Towertalk] Calculating guy distance for rotating towers

[n2mg@eham.net (Mike Gilmer, N2MG)]

N8DE wrote:

> Your calculations are for the HORIZONTAL distance from the 
> element tips to the guys; however, the closest distance is 
> PERPENDICULAR to the GUY, and will NOT be one foot with 
> your 'clearance'.  

Yes, of course... you and KK9A are both right.
D'oh!  

> With guy & element 'sag' I estimate the guy will touch the 
> element tips UNLESS the element sag is the greater of these 
> two 'sags'.

Element sag will help the situation, guy sag will hurt it. 
What's the formula for calculating guy sag?

Mike N2MG