Would you comment on the efficacy of the rig described below.
Let’s say we are talking about a 70 – 75 ft sloop/cutter with a DLR of around 60 – 70 – and beam to LOA of around 22% (typical of your style of hull).
It has a large foretriangle and fully battened deep roach mainsail.
The rig probably needs to be only low aspect given the area in the roachy mainsail and with say a 130% overlapping genoa in a large foretriangle.
There are 3 roller furling headsails (130% genoa, 90% jib, 60% jib) for the various wind ranges and an inner, probably permanently rigged, luff wire for a hanked on storm jib.
There are no backstays or runners and the mast has 25deg swept back spreaders.
Do you think this rig could work safely and efficiently?
What would be the main problems of the rig – balancing luff(4)/shroud tensions?
You have part of the equation right. The roachy main, swept spreaders, and moderate beam are all good.
In the forward triangle we would suggest a hanked on storm jib/staysail/solent. Then on the outer headstay a rolled working jib of between 95 and 105% with a clew high enough to work when beam reaching. The third sail should be a code 0 rolling sail optimized for 120/150 degrees TWA on its own free flying furler. You can run with the code 0 to leeward and jib to weather on a short pole.
This way it is easy to get mast tune right and you can store the code 0 when it is not in use saving weight and windage aloft.