The hull was a narrow two step, flat bottom design that was slightly concave in the rear most section.

It was constructed of mahogany ribs with a single ply spruce skin covered in doped and varnished linen.

A small, rectangular rudder was mounted under the rear of the hull to provide steerage in the water.

A lightweight cantilever structure extended from the hull to provide the lower support for the wing jib.

From the top of the mast, guy wires were run to the forward hull, the engine mount and the wings.