Propulsion field

Practical experience has shown that, depending on the field of application, a considerable reduction in inspection costs can be had when opting for radioscopy rather than radiography. By comparison with film technique, the inspection time of turbine blades for aircraft jet propulsion engines is reduced by 45% to 60%. When adding film costs, approximately DM 450.000,- can be saved per year /3/. As far as... 

The procedures used for estimating the service life of solid rocket and gun propulsion systems include physical and chemical tests after storage at elevated temperatures under simulated field conditions, modeling and simulation of propellant strains and bond tine characteristics, measurements of stabilizer content, periodic surveillance tests of systems received after storage in the field, and extrapolation of the service life from the detailed data obtained (21—33). 

A major problem is the design of a propulsion system for a vehicle that has no contact with a guideway. The only reasonable choice is a linear motor that uses magnetic fields to propel the vehicle. The development of a linear motor and its control system is at least as formidable a challenge as the development of a maglev suspension system. 

Li ion batteries are heavily advertised as the future power sources for electric vehicles. This seems premature because the technology of heat management and many questions of safety are not solved. Fuel cells and several types of secondary batteries have a long history in the field of electric vehicle propulsion, with successes and failures. For information on electric vehicle batteries, see [16-22],... 

Technical solutions may well tackle the problem. But in terms of global equity, forcing high-end technologies as first choice to combat the adverse environmental impacts of transport will be in favour of the industries in the developed countries. The analysis of world patent applications and global trade flows on behalf of the German Environment Ministry (Edler et al., 2007) demonstrates that developing and transition economies only play a very minor role in the developement and trade of new vehicles and propulsion systems. In the field of sustainable propulsion systems, non-OECD countries participate in world trade with 13% of imports and exports, but contributed only 2% of patent applications in 2005. 

A large part of the interest in electrostatic atomization has arisen from two fields of interest combustion of fuel oils and ion propulsion of rockets in space. Work in the latter area has been concerned primarily with atomization at high vacuum (10-8 atm) as in the work of Cohen (C5), Hogan (HI2, 13), Hendricks (H6), Schultz and Branson (S2), and Schultz and Wiech (S3). Graf (G8), Matthews and Mason (M3), Peskin and Raco (P3), Randall, Marshall, and Tschernitz (Rl), and Vonnegut and Neubauer (V4) have been concerned primarily with atomization at atmospheric pressure. Most of the... 

M. Barrere, Research in the field of chemical propulsion, NASA Accession No... 

Jet Propulsion Unit "Decipede". A jet propulsion unit, whcih develops 1000 pounds thrust for 43 secs, was developed at the request of the Engineer Board Field Station. The unit is the motor power of an amphibious Snake employed in Marine Army land operations. 

Bond, N. (1974) The Monster from Nowhere, in As Tomorrow Becomes Today, Charles W. Sullivan, ed. New York Prentice-Hall. (Originally published in Fantastic Adventures, July 1939.) Humans trap a 4-D creamre in our world. Also see Nelson Bond s 1943 short story That Worlds May Live that describes hyperspace propulsion systems. Bond describes a qaudridimen-sional drive, the first artificial space warp into the fourth dimension—created by Jovian scientists. The Jovians create a four-dimensional space warp between points in three-dimensional space. A magnetized flux field warps three-dimensional space in the direction of travel.. . . It s as easy as that. ... 

Phase contrast observations in flames) 10) R.R. John M. Summer-field, Jet Propulsion 27, 169—175 178 (1957) (Effect of turbulence on flame radiation) 11) H. Selle, Explosivstoffe 8, 9 195—204(I960) (Investigations on flame... 

Liquid explosives came into extensive use during World War I when nitro compounds and ammonium nitrate became scarce panclastites were most commonly used for military purposes and oxyliquits in the mining industry. During the World War II the Germans employed liquid mixtures for jet propulsion including a newcomer in this field—a mixture of concentrated (80-85%) hydrogen peroxide with hydrazine for the propulsion of V2 rockets. 

Alkyl Hydrazines are described under individual compds, if they are expls or used in Ordnance. The major physical and chemical props of a large number of alkyl-substituted hydrazines, currently of interest in the rocket propellant field, were detd by R.CHarshman at the Olin Mathieson Chem Corp, Niagara Falls, NY and discussed in Jet Propulsion 27, 398-9(1957)... 

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