Here's my scratch built model of a Gundalow. in their final iteration they were lateen rigged cargo hauling workhorses of the New Hampshire and Maine estuaries from the mid 1600's thru very early 1900. Flat bottomed with a very shallow draft that allowed sailing (or following the tides/currents) to ports upriver with needed supplies and returning with cargo of all types. My model is 50" in length. It is used as a display model for The Gundalow Company in Portsmouth, NH. I also use it with historical presentations I give to schools, historical societies and libraries. The model is fully functional. While not radio controlled it has the ability to float.