Myles,
I find it difficult to get enough sail area on a heavy displacement vessel with a long keel. This Colin Archer-like thing needs a jib on a bowsprit to get the CE right. Rigging with a JR schooner will most probably result in too much weather helm unless the rudder is replaced with the sort of rudder that Paul Thompson designed for his La Chica.
Now I have made a couple of tries with drawing a yawl rig. The one with 55sqm mainsail plus 8sqm mizzen didn’t look too extreme. The tip of the yard would be taller than the topsail of the gaffrig. This rig should ensure easy steering in most cases, and the (flat) mizzen could help with sitting steadily at anchor. Frankly, I think that even this ‘small’ JR would be faster than the original rig. The rig could be made even taller. It depends on what sort of mast you are able to make or purchase.
Another method, in case the gaffrig is still OK, is to simply replace the gaff mainsail with a junksail, and keep the rest of the rig as it is. You don’t get all the benefits of a JR this way, but you get the easy reefing of the main. With the jib (and staysail?) on rollers, that rig should be quite easy to deal with.
Question: Is the gaffrig (cutter or ketch?) in good order, and how does your boat sail with it?
Arne
What about this one?
