Thomas MacFinn wrote:http://www.youtube.com/watch?v=VGPU25ij6KY
QFT this guy has some nice tips, i suggest starting with the first one and watching all of them.
Also check out
http://www.bellatrix.org/school/
its an SCA training site but has a lot of good tips.
The Other thing to understand is there are two types of speed, Physical speed(actual speed) and Perceived Speed. Its really hard to increase your actual speed. But understanding timing, aiming, the proper muscle control behind a shot will make you seem a lot faster then you are.
A shot shouldn't come just from your arm or your wrist. You are likely to blow out your shoulder or develop major problems if you do something like this. Understanding that a shot comes from your hips, your back, your shoulders, your forearm, and your wrist Even clasping your fingers at the right time will make your shots faster and put some oomph behind it.
The sword your using does matter shorter weapons will always move faster as well lighter/counterbalanced. They aren't the only thing to it though so if you can get down the basics with your huge * sword (and thats being nice 48 inches seriously * is the point) when you pick up a proper weapon you'll find your doing a lot better. Best tip i can give on weapon length is hold a sword in your hand in your proper stance, swing it straight down, it should be able to do a full circle with your arm down and not hit the ground.