Re: Rigging up an A-sail
The simplest setup might be to bolt a nice solid tang flat on top of your mast, sticking out forward, to act as a crane. The tang has to be long enough and strong enough so you can mount a very strong swivel block on it that is completely clear of the forestay. You can then run the halyard through it externally, and not have to worry about exit holes weakening your mast. You will probably need to add some cleats P & S for the new halyard. You will also want to figure out how to work a winch into the equation in case it fills 10' from the top and starts to hoist your crew off the deck. 12 sec/ mile is a LOT.