Unusual Design

A recoilless gun was open at both ends instead of one end as in the conventional gun. When the propellant charge exploded, the shell sped forward through the barrel while the gas blew backward through the breech. The gun, shell, and propellant were designed to make the forward action equal to the backward reaction, eliminating recoil. 

By August 1944 the model was ready for a full-scale demonstration at Edgewood. Service officers were so impressed that they ordered the gun completed under top priority. The final, standard model consisted of a two-piece barrel mounted on a caliber. 30 machine gun tripod. Targets 3,800 yards away could be hit, but accuracy was best below 1,000 yards. The 28-pound HE shell easily demolished replica Japanese bunkers of earth and logs.  

The CWS contracted for the manufacture of 1,000 recoilless mortars, 100 of the weapons being completed before the end of the war. Recoilless mortars reached the Tenth Army in the Pacific theater in time for the Okinawa campaign, but otherwise they were produced too late for battle 

The German Army came close to the American Army in its stockpile of mustard filled shells, some 400,000 10-cm. mustard-arsenol shells coming to light after the war. No other chemical mortar shells were found. They either may have decided that other fillings were not satisfactory or else they were not able to put other shells into production.  

American mortar shells held more agent than either Japanese or German shells. They contained from 6.25 to 7.56 pounds of chemical, depending 

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StiTJCtural adhesives are also available in paste form. Bondline thickness control and void elimination are more difficult with paste materials but they can be very useful for unusual designs and innovative manufacturing methods. 

An exercise comprising individual statements, some describing everyday events and others more unusual, designed to increase participants awareness and understanding of the risk assessment procedure, both for themselves and others. 

Because of compressor economics, staging membranes with recompression is unusual. Designers can assume that a flow sheet that mixes unlike streams or reduces pressure through a throttling valve will increase cost in most cases. 

LCPs are handicapped by a high anisotropy of properties, shrinkage and thermal expansion low weld strength the cost, though justified by the performances and unusual design rules. 

Aluminium-air cells were first developed for portable applications such as mooring lights, and for recharging nickel-cadmium and lead-acid storage batteries. They have been fabricated in many unusual designs, e.g. the concentric rope battery which has an aluminium core surrounded by a separator and then the oxygen cathode. The rope may be several hundred metres long and can provide 0.03 W/m for a period of 6 months on immersion in the sea. 

The Dunlop tripsometer is an unusual design of pendulum consisting of a 42 cm diameter steel disc mounted on bearings and with an out of balance mass in the form of a bracket carrying the 4 mm diameter indentor attached to its periphery. It operates at considerably higher strain energy density than the ISO method but is claimed to have high accuracy and can be used with a relatively small test piece. Compared to the Lupke pendulum, it is also a very compact apparatus. 

The technical part of the feasibility study considers the alternative processes, and the equipment that constitutes the chemical plant in each case. At this stage it is necessary to identify any items of equipment that pose particular or unusual design problems, or which are very expensive or hazardous. The feasibility study should determine whether it is possible to design and build a chemical plant for a particular manufacturing process. Any external factors that may influence the operation of the plant should be noted, e.g. discharge levels, stability of raw materials supply, etc. 

One rather unusual design comprises a mixing system with two external chambers (Fig. 31). The nitrator is connected with both sides of each chamber, in each of which a propeller stirrer is rotated at 200-400 r.p.m. The speed of rotation and cross-sections of the chambers are so selected as to enable the whole of the nitrator contents to make one round within one minute. 

Fig. 27 An unusual design of a multivalent glycoconjugate to be used in carbohydrate-lectin interaction studies [187]...

French, E.V, Unusual Design for Tall Towers. Petroleum Refiner, July 1960, p. 103. 

The cameras normally used for powder diffraction are also well standardized by the manufacturers of x-ray equipment and it is only an occasional special problem that will require an unusually designed camera such as an asymmetric focusing type or a special small angle scatter camera. Even these cameras are now commercially available. 

Type s protection is also called special protection and enables unusual designs to be designed, tested and certified. It is a little used method and the applications are mainly suited to electronic and low power equipment. 

The bomb used in the assassination was not of standard issue but instead was of distinctly unusual design the upper third of a British hand grenade had been cut off and the open end and sides wrapped with tape.2 This strange modification becomes understandable if a way was needed to contaminate its contents with a foreign substance. 

This reaction is currently being carried out in a reactor network of unusual design in which injection of oxygen at several points is sufficient to maintain the partial pressure of oxygen at a value equal to that employed in the batch reactor... 

Force sensors are commonly used in medical robotic systems to measure and monitor tool-to-tissue and tool-to-surgeon interaction forces. Generally speaking, the technology used in these sensors is the same as that used in other applications, although specific issues of sterility and compactness often present unusual design strategies. 

All these properties can be explained by the unusual design of the repeat unit of PTMSN - bulky Si(CH3)3 groups attached directly to the very stiff main chain. 

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