Singlehander Layout Ideas

Originally posted by RS400atC hence the lee spreader doing nothing.

I don't believe you need the lee spreader to do anything... Laterally its opposing the windward spreader, so of no value, and the fore and aft effect is identical to the windward spreader. To my mind you just need the mast step and tube to resist torsional loads. So I reckon rig tension merely needs to be sufficient to keep jib luff sag under control. Even torsion doesn't seem to be that big a deal. I don't have a tenon in the (very unconventional) mast 'step' on my IC, and the mast doesn't move.

Edited by JimC - 13 Jun 16 at 9:20am

Originally posted by JimC Originally posted by RS400atC It's a bit more complicated than that, due to rig pre-load etc etc. Its a lot more complicated than that... For example, because the trapeze unloads the shrouds, most trapeze boats run a great deal of static rig tension in order to keep the spreaders working. A major point of the sometimes decried diamonds on the RS600 is that the mast support is independent of shroud tension, so there is no need to run very high rig tension to support the mast with that rig setup. But in most cases a boat with trapezes requires higher static tension than boats with wings or sliding seats.

Many classes seem to run as high a rig pre-load as the hull will stand.
With a plank, you need a lot of pre-load to avoid the lee shroud going slack and hence the lee spreader doing nothing.
As you say, the 'conventional' 3 wires and 2 spreaders is not the only or ideal solution.
I think in the days of planky Hornets, diamonds and so forth were not unknown, but then they used to appear on 5-0's in those days.
There are few like-for-like comparisons.
You could say conceptually, the ultimate trapeze rig is a board with harness. Rig tension not required, shrouds not required.....

A pic on cvrda Dinghy data

http://www.cvrda.org/wp-cvrda/dinghydata/delta-4/

Never heard of it... and nor has google!

Originally posted by RS400atC It's a bit more complicated than that, due to rig pre-load etc etc.

Its a lot more complicated than that...

For example, because the trapeze unloads the shrouds, most trapeze boats run a great deal of static rig tension in order to keep the spreaders working. A major point of the sometimes decried diamonds on the RS600 is that the mast support is independent of shroud tension, so there is no need to run very high rig tension to support the mast with that rig setup. But in most cases a boat with trapezes requires higher static tension than boats with wings or sliding seats.

Edited by JimC - 12 Jun 16 at 7:16pm