In this episode I build a Round Bottom or Hollowing Plane. This plane is also referred to as a Coopering Plane, which is a hand plane, meant to create a concave surface. This is an important tool for a shipwright who is “backing out planks” in carvel planking. The construction method used on this razee plane is in the Krenov style. This type of construction is done by laminating the plane with several pieces of wood, as opposed to the old method of mortising out the throat of the plane. In designing my plane I was taken by a Jack Plane I saw in The Unplugged Woodshop that Tom Fidgen had built. In my plane, not only is the bottom rounded, but also I increased the length and made the handle larger to fit my hand better. In 1981 Ron Hock began making blades for Krenov’s planes, and is still the leading manufacturer of this style of blade. Because I’m making a round bottom plane, I would have to alter a purchased iron, so I decided I would make my own iron from some O1 tool steel