released in 2016: the M20U Ovation Ultra and the M20V Acclaim Ultra. The M20U was based on the M20R, and its first flight was on June 4, 2016. It was the first M20 to have a pilot-side door. It also featured a composite shell forward fuselage which replaced the traditional aluminum skin. The M20V, which was developed from the M20TN Acclaim, had those features, as well. The company closed its doors and laid off all staff on November 12, 2019. The company reopened and staff returned to work on December 2, 2019. Design With the exception of the earliest models which had wings and tails with wooden frames, M20s are constructed entirely of metal. All are low-wing aircraft, and the wing skin is aluminum. Slotted flaps cover 70% of the trailing edge. Earlier models use a hydraulic hand pump to extend the flaps, while later models have electrically operated flaps. The forward fuselage has a steel-tube cabin structure covered in aluminum skin; the aft portion of the fuselage is of semi-monocoque design. In many places on the skin of the airplane, flush-mounted rivets are used to reduce drag. The landing gear on the Mooney M20 are made of heat-treated chrome-molybdenum steel. The main landing gear is attached to the main wing spar, while the nose gear is mounted to the tubular steel frame. Stacks of rubber shock discs act as shock absorbers. All models, with the exception of the M20D Master, came with retractable landing gear; on these models, the nose wheel retracts rearwards and the main wheels retract inwards. Early models use a hand-operated lever system to raise and lower the gear. The manually actuated landing gear are raised by unlocking the lever from just below the throttle, which is called a "Johnson Bar" and is named after the Johnson Bar (locomotive), rotating it to the floor, and locking it into a fixture on the floor. Lowering the landing gear require the same operations in opposite order. Al Mooney got his start working as young man for the railroad industry, hence the borrowing of a steam locomotive term for use in describing part of an aircraft. Starting in 1969, electrically operated landing gear became standard. The Mooney M20 has medium aspect-ratio tapered wings with 1.5 degrees of washout and 5.5 degrees of dihedral. Later models were equipped with stall strips to improve the stall characteristics. The empennage of the