Why the iconic Mooney M20 landing gear is named after a steam locomotive

Cultures · Published 3 October 2026 Swipe more like this →

In short: Al Mooney, the designer of the legendary M20 aircraft, began his career in the railroad industry. This background inspired him to adopt a manual landing gear lever system known as a Johnson Bar, a term borrowed directly from steam locomotives, which pilots manually rotate to the floor to lock the gear.

The Mooney M20 is a family of four-seat, piston-powered aircraft that has seen production across six decades. Al Mooney’s 20th design, the M20, first took flight on September 3, 1953, and achieved certification on August 24, 1955. Early iterations featured wooden wings and tails, but these were eventually replaced by all-metal construction following incidents of rot and structural failure. By 1960, under the engineering leadership of Ralph Harmon, the company transitioned to an all-metal design, starting with the M20B.

The aircraft is renowned for its speed and efficiency, a reputation built on continuous engineering refinements. From the early short-body models to the later long-body variants, the M20 series has evolved through numerous iterations, including the M20C Mark 21, the M20J 201, and the M20V Acclaim Ultra. These planes utilize a unique tail fin with a vertical leading edge that appears to lean forward, and a pitch trim system where the entire tail assembly pivots. Many models also feature a ram-air induction system, or 'Power Boost,' which increases manifold pressure for enhanced performance.

Despite its technical success, the company faced significant financial turbulence, including bankruptcy in 1969 and multiple production halts due to economic recessions. Ownership shifted several times, from American Electronics Laboratories to Republic Steel and eventually to international private equity firms. Throughout these changes, the M20 remained a staple of general aviation. As of August 2017, over 6,700 of these aircraft were registered with the FAA, underscoring the enduring legacy of a design that began with a railroad-inspired lever and evolved into a high-performance machine.

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