Hams with big antennas probably know a lot about that.
On Sat, Aug 28, 2021 at 10:56 PM J Farmer <jfarmer@xxxxxxxxxxxxx> wrote:
On 8/24/2021 7:05 PM, William Claybaugh wrote:
I’m in the final stretch of finishing an (initially) 24 foot tall
launch tower of triangular cross-section and fairly hell for stout.
The last (known) problem is setting up the guys to keep the front end
from whipping during launch and under wind loads.
I’ve worked out the geometry (four ground anchors on 24 foot centers)
to give a near 45 degree ground angle (52 degrees calculated). But I
am interested in the details of rigging:
What wire rope diameter is appropriate and how does one calculate
that? Does the sizing of the turnbuckles matter (12” of draw vs
6”?). Is stainless preferable? What do experienced riggers know about
this problem that I do not yet know?
Bill
No answers from me(*), but I would query boatyards, especially ones that
focus on sailboats of decent size.
(*) Eg. I have some reference books on sailboat design that talk about
it, but real life has prevented me from digging into the subject.
John
