Work on the M-1 started in 1955 at the Schempp-Hirth factory, while Matteson was on military duty in West Germany. The design that Matteson had conceived was adapted to German metric standards and materials by Alfred Vogt who did the early construction work. After being posted back to the United States Matteson completed the aircraft in 1959 in California.[1][2][3]
The M-1 was built from wood and covered with doped aircraft fabric covering. The semi-tapered wing was of 51ft (15.5m) span and used a NACA 63-518 wing rootairfoil, transitioning to a NACA 4412 airfoil at the wing tip. The three-piece wing, with a fixed center section and removable tips, featured a foam-filled leading edge and large-sized lower surface dive brakes. The aircraft had a conventional tail with a tall, straight vertical fin. The M-1 used a take-off dolly, landing on a fixed skid.[1][4]
Kirby described the aircraft: "I have flown the ship and it is a very fine machine. Its drawbacks are difficult assembly and a poor landing gear system." While he owned it Kirby modified the aircraft to try to address some of the noted deficiencies.[1]
The M-1 is no longer on the Federal Aviation Administration aircraft registry and its registration has been reassigned. It was reported that the aircraft was likely written off.[5][6]
Specifications (M-1)
Data from Soaring,[1] The World's Sailplanes:Die Segelflugzeuge der Welt:Les Planeurs du Monde Volume II[7]
↑ Shenstone, B.S.; K.G. Wilkinson (1963). The World's Sailplanes:Die Segelflugzeuge der Welt:Les Planeurs du Monde Volume II (in English, French, and German) (1sted.). Zurich: Organisation Scientifique et Technique Internationale du Vol a Voile (OSTIV) and Schweizer Aero-Revue. pp.34–36.
Shenstone, B.S.; K.G. Wilkinson (1963). The World's Sailplanes:Die Segelflugzeuge der Welt:Les Planeurs du Monde Volume II (in English, French, and German) (1sted.). Zurich: Organisation Scientifique et Technique Internationale du Vol a Voile (OSTIV) and Schweizer Aero-Revue. pp.34–36.
Said, Bob (November 1983). "1983 Sailplane Directory". Soaring Magazine.
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