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Friedrich Sander (left) and Fritz von Opel (right) in front of Opel RAK 1 rocket-powered aircraft. Rebstock, Frankfurt. 30 September 1929. Friedrich Wilhelm Sander (25 August 1885 in Glatz (Kłodzko) – 15 September 1938) was a German pyrotechnics and rocket technology engineer as well as manufacturer remembered for his contributions to rocket-powered flight as key protagonist of the Opel-RAK ...
Georg Arthur Constantin Friedrich Zander (also Tsander, Russian: Фри́дрих Арту́рович Ца́ндер, tr. Fridrikh Arturovich Tsander; Latvian: Frīdrihs Canders, 23 August [O.S. 11 August] 1887 – 28 March 1933), was a Baltic German pioneer of rocketry and spaceflight in the Russian Empire and the Soviet Union.
Friedrich Sander, Opel RAK technician August Becker and Opel employee Karl Treber (from right to left) in front of Opel liquid-fuel rocket-plane prototype while test operation. Max Valier also reports the launch of two experimental liquid-fuel rockets by Sander on April 10 and 12, 1929.
Opel RAK.1, world's first public flight of a rocket-powered aircraft on September 30, 1929 Fritz von Opel (right) and Friedrich Sander (left) in front of Opel RAK.1. The Opel RAK.1 (also known as the Opel RAK.3 [1]) was the world's first purpose-built rocket-powered aircraft.
Sander illusion. The Sander illusion or Sander's parallelogram is an optical illusion described by the German psychologist Friedrich Sander (1889–1971) in 1926. However, it had been published earlier by Matthew Luckiesh in his 1922 book Visual Illusions: Their Causes, Characteristics, and Applications Archived 2008-11-21 at the Wayback Machine.
The Knight's Cross of the Iron Cross and its higher grades were based on four separate enactments.The first enactment, Reichsgesetzblatt I S. 1573 of 1 September 1939 instituted the Iron Cross (Eisernes Kreuz), the Knight's Cross of the Iron Cross and the Grand Cross of the Iron Cross (Großkreuz des Eisernen Kreuzes).
Frederick Arthur Sanders (1856-1930) was a Church of England priest, most notably Archdeacon of Exeter from 1909 until 1924. Sanders was born in Exeter; educated at Marlborough and Keble College, Oxford; [1] and ordained in 1879. After a curacies in Lichfield and Buckland Monachorum he held incumbencies at Brixton [2] and Woodleigh. [3]
Friedrich Sander was engaged in German military projects under General Walter Dornberger but was imprisoned for treason by the Nazis and forced to sell his business. Sander died in custody 1938. The collaboration between von Opel and Hatry was an alliance of convenience from the start and certainly not a "love marriage".