In 1928, Boeing introduced America's first airliner designed specifically for passenger comfort and convenience. The Model 80's fuselage was made of welded-steel tubing covered with fabric, and its wooden wingtips were removable so the airplane could fit into the primitive hangars along its route. The Model 80 carried passengers in a spacious cabin appointed with leather upholstery, reading lamps, forced-air ventilation, and hot and cold running water. The first version carried 12 people, and it was followed by the larger, 18-passenger Model 80A, which made its first flight, Sept. 12, 1929. Ten Model 80As flew for the Boeing airlines.