The rudder is the traditional barn door-styled outboard type. The rig is a big gaff mainsail with both peak and throat halyards. This means you will use two lines to raise the mainsail. The peak halyard controls the angle of the gaff and the throat halyard controls the height of the gaff and luff tension. Spars are Sitka spruce.
Performance has to be judged by catboat standards and catboats do have their idiosyncrasies.
With only a headstay and no side shrouds, you can sail a catboat downwind by the lee quite easily. There is no shroud to impede the outward travel of the boom. In some cases this may be fast, but consider the loads on that long boom or on your head when you jibe. Jibing a catboat in a breeze can be exciting. Now add to that excitement the tendency of catboats to develop an armload of weather helm.