Re: Why does Tanzer 22 turn faster than Morgan 22?
What I mean when I say "turning fast isn't the fastest way to turn" is that maintaining your boatspeed is more important than changing course quickly. Putting the helm hard over when you tack can really put the "brakes" on, and you scrub a lot of speed. The result is that you come out of the tack low and slow. Making a wider, smoother turn may help you to maintain your speed, and as a result you will be up to full speed and full point sooner on your new tack. Every boat is different, and some boats can be "thrown" around more than others. You are better off figuring out what works for your boat rather than worrying about turning as fast as your competitors.
On your rudder, templating and fairing can make a big difference, and won't get you in trouble with handicapping like replacing or modifying a rudder would. Templating is when you find the foil profile for your rudder, and cut pieces of thin plastic or wood in your desired foil shape. You can then place the templates at various points down each side of the rudder to show you where you need to add or remove fairing compound to achieve the correct foil shape. That can make a big difference to the efficiency of your rudder.
1979 Santana 30 Tall Rig