which model?
Perhaps you should ask someone who actually owns a Macgregor powersailor? The mac 17 to 25 models were produced until about 1994. not sure, but the mac 19 was produced in 95, the first powersailor, and that was followed by the 26X until 2002. starting in 2003 the 26M began. the M hull is nearly like a traditional sailboat except at the very aft hull section, where it flattens slightly. A planing hull must ride up on the water instead of pushing through it like a sailboat. The speed of a "displacement hull" is determined by it's waterline length, and is limited by natural physical laws. The M is a very fast sailboat, but doesn't sail upwind as well as others of similar size. This may have something to do with hull shape? Nevertheless it has earned a PHRF of 216 to 225 in many race organizations, and that is better than many full keel vessels of similar length.