altair industries driftboat plans altair offers complete plans and a construction guide for a 16′ mckenzie river drift boat. (added: 2-dec-2003 hits: 44766) my. Viking boat scale model plans. here are two sets of viking long ship scale model boat plans. there were several kinds of boats similar to this in different sizes and. Many boat plans are offered online. at first everything is very confusing, then you start to get some idea of the different types of boats available. free is not.