Experimental Rocket Motor ORM definition of Experimental Rocket Motor ORM in the Free Online Encyclopedia.

Experimental Rocket Motor (ORM)

the designation of a family of the first Soviet experimental liquid-propellant rocket motors designed by V. P. Glushko, with a thrust of 60–3,000 newtons (N), or 6–300 kilograms-force (kgf). The motors were designed for operation with various low-boiling and high-boiling liquid oxidants combined with liquid propellants.

In the period from 1930 to 1933 the Gas Dynamics Laboratory (GDL) developed a series of liquid-propellant rocket motors designated as ORM and ORM-1 through ORM-52. The ORM-50 (thrust, 1,500 N) and ORM-52 (thrust, 3,000 N) operated on nitric acid-kerosine fuel, with chemical ignition; they underwent official tests in 1933. The pressure in the combustion chambers was up to 2.5 meganewtons per sq m (MN/m²); the specific impulse was up to 210 sec. These engines were designed for repeated restarting. From 1934 to 1938 a special-projects group at the GDL that was working on the development of liquid-propellant rocket engines and constituted an independent group in the Research Institute for Reaction Engineering developed the liquid-propellant rocket engines ORM-53 through ORM-102. They were the prototypes for the development of structural components used for ignition and launching, for programmed operation with various liquid propellants, and for practical purposes in rocket-powered aircraft (the ORM-50, ORM-52, and ORM-65).

The ORM-65 was officially tested in 1936; it was the most advanced motor of its time. It used a nitric acid-kerosine propellant. The thrust was adjustable within the range of 0.5–1.75 kN, and the specific impulse was 210–215 sec. The engine could be started both manually and automatically; ignition (with signaling) was of the pyrotechnic type, using a glow plug. The ORM-65 could withstand more than 50 firings, with a total operating time of up to 30 minutes. The pressure in the combustion chamber was 2.5 MN/m² (25 kgf/cm²). The steel combustion chambers (with an inside diameter of 100 mm) and the conical (20°) nozzle, with a critical section 23 mm in diameter, were equipped with spiral fins to provide regenerative cooling by means of the oxidant. There were three centrifugal burners for each component. In 1937–38, 30 firing tests on the ground were carried out with RP-318–1 rocket airplanes, designed by S. P. Korolev. In 1940 the pilot V. P. Fedorov completed a flight in an RP-318–1 equipped with a motor that was a modification of the ORM-65. The model 212 winged missile, designed by Korolev and equipped with an ORM-65 motor, passed 13 ground firing tests (in 1937–38) and two flight tests (in 1939).

Mentioned in	?		Encyclopedia browser	?		Full browser	?
No references found			expendable rocket expendable vehicle Expenditures, Deferred expense Expensiveness Experience Experiencing experiential experiential-existential group therapy Experiment Experiment Description Language experimental breeder reactor experimental design experimental ecology Experimental Embryology Experimental Endocrinology and Hormone Chemistry, Institute of Experimental Field eXperimental LISP Experimental Medicine, Institute of experimental petrology Experimental Phonetics Experimental Physics Control Systems Experimental Programming Language experimental psychology experimental reactor Experimental Rocket Motor ORM Experimental Statistical Output Rate Experimental Veterinary Science, Institute of ExperLogo Expert expert control system Expert Judgement Models expert system Expert systems Expert Systems Ltd. expert witness expiatory chapel expiration expiration date Expiratory Accent expiratory reserve volume expiratory standstill expireware explanation explant explementary angles expletive explicit explicit link explicit memory explicit parallelism			Experimental probability experimental procedure experimental procedure Experimental Product Experimental Products Program Experimental Program to Stimulate Competitive Research Experimental Program to Stimulate Competitive Technology Experimental Programming Language Experimental Prototype Experimental Prototype Automatic Meteorological System Experimental Prototype Community of Tomorrow Experimental Prototype Test experimental psychology experimental psychology experimental psychology Experimental Psychology Society Experimental Psychopathology and Cognitive Therapy Experimental Radar System experimental reactor Experimental Reflector Orbital Shot Experimental Regional Transport Board Experimental Repair Ship Experimental research Experimental research Experimental research Experimental research Experimental research Experimental Research Design Experimental Research Society Experimental Rocket Experimental Rocket Motor ORM Experimental Run-Time System Experimental Safety Vehicle Experimental School Environment Experimental science Experimental science Experimental science Experimental science Experimental Small Satellite Experimental Social Innovation and Dissemination Experimental Software Engineering Group Experimental Software Engineering International Week Experimental Solid State Exchange Experimental Sonic Azimuth Detector Experimental Space Plasma Group Experimental Space Station Experimental Squadron Experimental Standard Conditions of Enzyme Characterizations Experimental Standard Deviation of the Mean Experimental Statistical Output Rate Experimental Stealth Tactical Experimental Storage Ring Experimental Strategic Missile Experimental Stress Analysis Lab Experimental Studies on the Nature of Species experimental study experimental study experimental study Experimental Surface Ship-Launched Aerial Intercept Guided Missile experimental surgery experimental surgery