[TowerTalk] Fall Zones

[Richard (Rick) Karlquist]

On 7/9/2019 7:39 AM, Bob Shohet, KQ2M wrote:
> I don’t know how long is required to crank down at 89’ crank-up at full extension but I would suspect that it is at least 90 seconds.
> 

90 seconds????

My 106 foot crank up takes at least 20 MINUTES to crank down.
A lot of "stuff" can happen in that time.

The other issue is that towers without positive pull down
famously hang up in high winds at the worse possible time.

OTOH, reviewing the calcs, it appears that the weak point
in my tower is about 1/2 way up.  I am guessing that it
would tend to fold over there and maybe not even hit the
ground at all.  Just a guess.

Rick N6RK