What is the maximum speed of a Tanzer 22?
The short answer: 6. The longer answer: use the magic formula for displacement hulls… V=1.34(L)^0.5 (ie, square root of waterline length) with V in knots and L in feet. Keep in mind it’s only theoretical. The 1.34 coefficient is approximate, as it was derived from observation of full-keeled wooden boats, and can vary from 1.20 to 1.8 depending on hull shape as there are lots of other factors that can come into play. Heeling, for example, will lengthen waterline length, but there’s also induced drag, yawing, eddy formation, wave making, transom separation, and other rather frightening things to throw the estimate off. The T22 has a waterline length of about 19.75 ft, so an approximate displacement hull speed is 5.96 knots. Since the T22 hull is flat on the after part of the hull’s wetted surface (“flat buttocks”), it likes to surf and even plane given the right conditions. A boat’s hull speed is by no means a speed limit. It is simply the point at which the boat begins to lose power b
