Without doing any actual engineering statics work, is there a rule of
thumb for truss height for helping to offload boom sag?
I've got a LJ205 that's been recycled to a 10m OWA. The back end of
that antenna is very heavy relative to the front and I'm planning to put
a truss on it to help the sag.
Normally I would move the existing center mast mounting point to a
balance point that would leave the two boom halves even. And then put
the truss near there, or integrated into the mounting point. I'm not
sure if the boom is of uniform construction or not. At this point I'm
thinking that using the mast for both the mounting point and the truss
will work although there will be a persistent moment around the mount.
Not ideal, but this is not a very big antenna and given the original HG
design did not have a truss integrated, adding one in this case may be
overkill.
Appreciate any comments the board may care to offer.
73/jeff/ac0c
alpha-charlie-zero-charlie
www.ac0c.com
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