[nolatom]

Good advice above. I wouldn't try to tack rudderless without a jib, you really do need some center-of-effort forward to pull that bow around with a backed jib.

And in a small boat, don't ignore crew weight placement. Generally a boat's bow (and the relationship between center of effort and center of lateral resistance) will steer you away from the direction in which you heel her. So heel the boat to leeward if you want to head up and initiate a tack, and to windward if you want to head down and jibe. Dinghy sailors learn this early on as a matter of "body English", but it can apply to the heavier boats as well. Without a rudder, you need all the help you can get, and this may be enough extra help to get you through the tack or jibe.