During 1939-1940 - Launch Site: Peenemuende. Launch Complex: -. Launch Pad: -. Launch Vehicle: Me-163. -
 JATO tests at Peenemuende Nation: Germany. From 1939-1940 a series of rocket engine tests to support development of a JATO pod were conducted from Peenemuende-West with a He-111. It was found that liquid oxygen was not an appropriate oxidiser for civil use, so the engineers at Walther - Kiel introduced hydrogen peroxide as an alternate. The Walther engine was simpler than the rocket team's prototype, could produce 1000 kgf for 300 seconds, and was capable of taking a rocket fighter to 12 km altitude within two minutes from engine start.
References: 693.
1939 January 6 - -
 Goddard Series P Section A rocket tests Nation: USA. Goddard began tests of two propellant pumps, called A and D. These were selected for use in four proving-stand tests (P1 to P4), from January 6 to February 28, 1939. From these tests it was concluded that a small chamber, or gas generator, producing warm oxygen gas, should be developed for operating the turbines.
References: 482.
1939 February 7 - - Best test of new Goddard liquid propellant pumps. Nation: USA. Engine used 29 lb liquid oxygen; 45 lb gasoline; produced 671 lb of lift for 12 sec, with jet velocity of 4820 ft/sec; oxygen 2.15 lb/sec; gasoline, 2.28 lb/sec; mixture ratio 0.94. Over 24 pump tests were completed by the time of the last run on February 28.
References: 482.
1939 March 23 - Launch Site: Kummersdorf. Launch Complex: -. Launch Pad: -. Launch Vehicle: A3, V-2. - Hitler visits Kummersdorf-West Nation: Germany. This was the first time he became acquainted with liquid rocket engine technology. 300 kgf and 1000 kgf engines were fired in his presence. A colour-coded cutaway model of the A3 rocket was presented and its systems explained. Hitler was quiet throughout the exhibits and asked no questions. Afterwards, while taking lunch at the mess hall, he asked only about the development schedule (clucking when told), the range of the missile, and the impact on the schedule if synthetic 'Eisenbled' was substituted for light metal alloys in the rocket frame. Hitler spoke of deceased rocket pioneer Max Valier - he had known him in Munich, but dismissed him as a dreamer. Dornberger countered by comparing the state of rocket development to the early days of the zeppelin, when Lillienthal made the first primitive experiments. Hitler in turn dismissed airships as dangerous, filled with explosive gas . The Fuehrer finally departed with handshakes and few words. His summary of the day: 'Es war doch gewaltig' (it was impressive, nevertheless). The rocket team was dismayed - it was the first time a visitor had exhibited no reaction to the power the rocket engines when fired for their benefit. But on the plus side, Von Brauchtisch said he was astounded at the progress made by the team in only a few years. Dornberger believed Hitler was enthralled with artillery and tanks, and was unimpressed with rocket technology. He thought Hitler didn't understand the possibilities and didn't believe the time had come yet for development of the rocket as a weapon.
References: 693.
1939 March 24 - - Goddard Series P Section B rocket tests Nation: USA. Series P section B was a series of tests by Goddard in development of a gas generator to run turbines. Through April 28 a series of eleven static tests (Pa-k) of a new gas generator was made near the shop. The best form developed ran steadily for 10 sec at 180 psi for 250-psi tank pressures, with the rate of flow of oxygen at 0.49 lb/sec.
References: 482.
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