March 1945, the Navy ordered 10 relatively minor derivatives of the XBTC-2. They had 2,500-horsepower Wright R-3350-4 engines turning single-rotation propellers. Progress was faster on this model, and the first flight was made in January 1946. Gross weight was 19,072 pounds, and max speed was 297 mph at sea level and 330 mph at 17,000 feet. Armament was two 20mm cannon, eight five-inch rockets and one 2,000-pound bomb or a torpedo.