Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 26. Chapters: Argentine sailplanes 1940-1949, Brazilian sailplanes 1940-1949, British sailplanes 1940-1949, Czechoslovakian sailplanes 1940-1949, Finnish sailplanes 1940-1949, French sailplanes 1940-1949, German sailplanes 1940-1949, Polish sailplanes 1940-1949, United States sailplanes 1940-1949, Schweizer SGS 1-23, Schweizer SGU 1-19, Schweizer SGS 2-12, Schweizer SGU 2-22, I.Ae. 34, Slingsby Prefect, Schweizer SGS 1-21, IS-1 S p, HWL Pegaz, Slingsby Kite 2, Slingsby Falcon 4, Slingsby T.25 Gull 4, Slingsby T.20, Bowlus/Nelson Dragonfly, IS-2 Mucha, IS-3 ABC, Harakka, Slingsby Tandem Tutor, Laister-Kauffman TG-4, Slingsby T.21, Akaflieg Darmstadt/Akaflieg Munchen DM1, IS-5 Kaczka, PIK-5, Briegleb BG-7, IS-B Komar, IS-4 Jastrz b, Castel-Mauboussin CM.7, Slingsby Motor Tutor, Fouga CM.8, Akaflieg Munchen Mu18 Messkrahe, Elliotts Primary EoN, Short Nimbus, EoN Olympia, Neiva B Monitor, Letov LF-107 Lu ak, Horten H.IV, Horten Ho VI, Triglav. Excerpt: The Schweizer SGS 1-23 is a United States Open and Standard Class, single-seat, mid-wing glider built by Schweizer Aircraft of Elmira, New York. The original "standard" 1-23 was introduced in 1948. The aircraft quickly became the most numerous competition and performance sailplane in the USA. A total of 93 of all sub-models were built by the time production was completed in 1967. Schweizer Aircraft started construction of the 1-23 prototype in May 1948. The aircraft was completed and first flew on 5 July 1948, only nine weeks after construction had begun. The prototype had been ordered by Bill Frutchy of Elmira, New York and the aircraft was available for him to fly it in the second half of the US Nationals. The first production 1-23 was ordered by E.J Reeves. The success of this aircraft lead to more orders and series production was commenced. The 1-23 was initially sold on a "factory-..