OTRAG Rocket.pdf

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about 20 for uneconomic (This value is in modern Oberstufen 100-1000 utilize efficiently the fuel). He refers, however that the closely spaced engines produce a common collimated beam, which generates a dynamic pressure, which should offset this again to some extent. In the built form of the nozzle end almost directly behind the nozzle throat, so that the fuel was not used very efficiently. The area ratio of nozzle throat to nozzle outlet is only 6 Ignition takes place through a liquid (50% furfuryl alcohol in 50% water) at the bottom of the diesel oil tanks, the first flows into the engine. The 0.3 kg furfuryl alcohol in aqueous solution miscible heavy as diesel oil, and not with this. The mixture is hypergolic with HDA, thus igniting on contact. The ignition takes place within 10 ms and the inflow of diesel oil maintains the burn. A re-ignition is not possible and an ignition under microgravity not (in this case would Furanol with the fuel mix). Cross section through the engine is done via a control valve with a planetary gear that regulate the fuel flow in 3 positions. (Close, Half Flow, Full flow). The flow rate corresponded to half a thrust of 40% of the nominal value. The missile would likely be by lowering the flow on one side and so the thrust reduced. In the aerodynamic phase, tube fin in the simple first models (short pipes) rather than stabilize the rocket fins. This concept was tested in wind tunnels of DFVLR. Larger versions would be a system of thrust used to change the path. In addition to controlling the thrust of the inflow, it was also possible to regulate the thrust through the supply pressure. This decreased, while the tanks empty, on its own from 40 to 15 bar. It would also have been possible to reduce the initial pressure. The minimum shear for stable operation was 40% of the nominal thrust, or about 10 kN. Each engine contains a simple microcontroller, which can only determine whether an engine works. It was a simple ASIC from Motorola, which was cast with the nickel cadmium battery and two Darlington transistors in a polyurethane block. The Darlington transistors would allow the high current load for the motors to generate the supply voltages without the battery to charge. In case of malfunction, the valve is closed and passed a message to the host computer to control the entire missile by radio. This switches the case of malfunction the corresponding opposite engine to thrust is symmetrical. This control has been tested by computer simulations. Kayser is the reliability of the engines as the "6 Sigma". But it is a size from the production technology, the estimated production for a committee of 3.4 parts of 1 million units produced. There is no reliable value for rocket engines. Similarly designed engines for satellites without cooling and discharge are estimated with a reliability of 99.55%. This value appears likely in view of the false starts of at least two OTRAG missiles.
RohrfinnenDas engine is distinguished by the fact that several parameters change during the flight. The combustion chamber pressure drops during operation, the combustion chamber volume is increased by removal of the insulation material. In all, more than 20 years have flown over 50 million DM in the optimization of the engine. Characteristic Standard Metric Mass (at ignition) 65 kg Mass (after firing) 52 kg Length 1 m Diameter 0:27 m Combustion chamber and nozzle length 0.6 m Combustion chamber pressure (ignition) 30 Bar Combustion chamber pressure (firing) 10 Bar Characteristic length on ignition 2.0 m Characteristic length at the end of firing 1.5 m Thrust range of 5-50 kN Thrust in the tests (soil) 30 kN Thrust during test (vacuum, theoretical value) 36.2 kN max. Shear at 100 mm nozzle throat diameter of 35 kN max. Shear at 80 mm nozzle throat diameter 25 kN Minimum thrust in% of the starting spurt 40% Minimum Burn Time 20 seconds Maximum Burn time 150 seconds Stages A tank and an engine form a basic unit. Lutz Kayser now called the technology "Common Rocket Propulsion Units", abbreviated CRPU. The length of the missile can be varied by the number of 3 m tank modules. The tests were carried out with modules from 6 to 12 m in length. Possibilities to about 30 m long modules have been. Are ideal because of the volume ratio of oxidant: fuel of 3:1, the rockets from 12 to 24 m in length, because then there is the diesel tank of a 3 m or two segments. For intermediate sizes, it is not possible to exploit the full capacity of a tank. The simplest OTRAG rocket is now composed of concentrically nested cubes with the following steps: Level 3: 4 CPMR (2x2 cube) Level 2: 12 x CPMR (+4 = 16 CPMR CPMR = 4x4 cube) Level 1: 48 x CPMR (+12 = 64 CPMR CPMR = 8x8 cube) This rocket with a launch mass of about 100 t possess a payload of 1 ton and would be high without payload 25 m and 2.4 m wide. The amount is only the width is in the following models are larger. Similarly, a rectangular configuration. This shows the next larger model:
Page 1 and 2: OTRAG Rocket Introduction In this a
Page 3 and 4: Lutz Kayser was in addition to the
Page 5 and 6: • Reduce costs by using commercia
Page 7 and 8: denser than nitric acid and added a
Page 9 and 10: The engine has one line for the oxi
Page 11 and 12: opening is a thrust of 25 kN, the l
Page 13: The below average image that antici
Page 17 and 18: Diesel oil combustion support 220 k
Page 19 and 20: from each other by their diameter i
Page 21 and 22: OTRAG were to Lutz Kayser (CEO) Fra
Page 23 and 24: start Mobutu himself. Like most of
Page 25 and 26: optimize the parameters of a module
Page 27 and 28: 25% each for the activities in Zair
Page 29 and 30: Advantages of the concept The massi
Page 31 and 32: other. It transmits vibrations it g
Page 33 and 34: The whole thing is like comparing a
Page 35 and 36: ocket. They must be considered in t
Page 37 and 38: nozzle throat diameter is variable,
Page 40 and 41: © the text: Bernd Leitenberger. ©
Page 42: Space World, August / September 197

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