Beechcraft Model 18
The Beechcraft Model 18 is a twin-engined light transport built by the Beech Aircraft Corporation of Wichita, Kansas. First flown in 1937, it remained in production for thirty-two years, and more than 9,000 were built in thirty-two versions. Designed as an executive and feeder-airline aircraft, it served worldwide in civil transport and utility work and, in military service, as a staff transport and as a trainer for navigators and bombardiers. Hundreds survive, in museums and in private hands.
Why It Mattered
The Beechcraft Model 18 was a small twin-engined transport from Wichita, Kansas, that first flew in January 1937 and remained in production for thirty-two years. More than 9,000 were built, and the National Air and Space Museum counts thirty-two versions of the basic design. What began as a six-to-eight-passenger executive and feeder-airline transport was adapted into a mail plane, a utility aircraft and a family of military trainers. The museum judges that the type's success ensured the success of Beech Aircraft Corporation throughout the 1940s.
Design Notes
The Model 18 is a low-wing, all-metal, twin-engine monoplane with a tailwheel undercarriage, its cabin arranged for six to eight passengers in executive or feeder-airline service. The first aircraft flew with Wright R-760 radials, and some early aircraft used Jacobs engines, but the 450-horsepower Pratt & Whitney R-985 Wasp Junior became the type's standard powerplant. Beech refined the design instead of replacing it: the D18S of October 1945 brought structural modifications for a greater maximum weight, along with new landing gear, brakes and tires. The Super 18, flown in December 1953, was the last version, and some variants could be fitted with skis or floats for work away from airfields.
Operational History
The first Model 18 flew at the Beech factory airport in Wichita on 15 January 1937; the pilots were Beech test pilot Ding Rankin and James N. Peyton, a TWA senior pilot. Civil orders were slow to come: by the attack on Pearl Harbor, only 39 had been sold, 29 of them to civilian companies. Foreign and charter operators took to it sooner, and one Canadian operator, Prairie Airlines, ordered several to deliver air mail across Saskatchewan. War changed the scale of the programme, as Beech built thousands for the United States armed forces. The Army flew the type as the C-45 Expeditor staff transport and as the AT-7 Navigator and AT-11 Kansan trainers, while the Navy's equivalents were the JRB transports and the SNB trainers. The trainers' reach was wide: the National Air and Space Museum records that the AT-7 and AT-11 trained roughly nine in ten of the Air Force's navigators and bombardiers. Peace brought a second career in civil hands, in work from freight and air ambulance flying to spraying, firefighting and film work. The services kept their aircraft far longer, the Navy retiring its last UC-45J in 1972 and the Army flying C-45s until 1976. New production ended in November 1969, when the last aircraft built went to a customer in Japan.
Afterlife
Hundreds of Model 18s still exist, from museum exhibits to restored aircraft flown by private owners. The National Air and Space Museum displays a D18S, N522B, which Mike Mitchell operated as an air ambulance from Phoenix, Arizona, for fifteen years. In that work it flew a million and a quarter miles and carried nearly fifteen thousand patients, and Mitchell donated it to the Smithsonian in 1976. The very first Model 18 also survives: NX15810 is under restoration at Chino, California, to fly again in its original 1937 configuration. Smithsonian Magazine records a less dignified retirement: one Model 18 sits permanently atop a volcano at a miniature golf course in Rehoboth Beach, Delaware.