Several other piston Commander models followed, and in the early 1960s, after Rockwell acquired the company, the 680FL Grand Commander was introduced. It featured a much longer fuselage and the trademark picture window under the wing. The same fuselage was used for the 680T, the first Turbo Commander, which sported two 575 hp Garrett AiResearch TPE331-43 engines (the production of which was later taken over by Honeywell Aerospace), providing higher gross weight capabilities and better performance. The 690 followed in 1973 with a 717.5 hp TPE331-5, a larger wing, rudder and dorsal fin, and a longer tail cone. The result was an airplane with a service ceiling of 31,000 feet, a 9,600-pound gross weight and a baggage capacity of 600 pounds. And with subsequent 690 models the performance numbers improved even more.