I'm a big fan of the Hoyt jib boom, but I have some worries about the
new rig.
On one hand, it solves a lot of problems.
On the other, there are some serious stress concentrations on the
connections between the boom and the mast, and the gaff and the mast.
That little ~30 cm post has to take some serious bending and torsion
from the sail and front/back "stays", while also transferring that
force into a mast that is already under a lot of stress. There's also
got to be some significant out-of-column compression once those stays
are taught.
People who design in carbon would probably say that you can calculate
these stresses with a good finite element analysis program. They would
be right, but it would still worry me.
I personally prefer a simpler design that eliminates stresses --
that's one of the reasons I'm such a fan of the Harryproas. Both the
easyRig and a wishbone or fixed-boom una rig would both require simpler
masts (good for repairs and emergencies, too). They wouldn't have that
clean leading edge, though.
- Mike
proaconstrictor wrote:
I couldn't get the search to work tonight, anyway, any discusion of
this rig yet, for a proa?
http://www.garryhoyt.com/id32. html
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