G. C. Huang

In this paper, empirical equations of local as well as average heat-transfer coefficients of single jet system were derived. Two aspects of multiple jet systems have been studied. One concerns mainly the uniform distribution of heat-transfer coefficients and economy of power consumption. The other concerns the high magnitude of heat-transfer coefficients and the interference among jets. The experiments were conducted at Reynolds number from 10 to 10 and hole size from 1/8 to ¼ in. diameter. An attempt to correlate empirical data to render practical application possible

Stanley R. Mohler

An additional component, consisting of the men and electronic equipment comprising the air traffic system, is now as integral a part of civil aeronautics activities as are the pilots and their aircraft. Two intertwining threads wind inseparably through the above picture: (1) the maintenance programs related to the health and functional adequacy of airmen and equipment, and (2) the economics of "the dynamic, ever changing, often hard-pressed, aviation industry. The basic mission of a civil aviation flight is to return unharmed the occupants of the aircraft to terra -{firma. At times the pilot may be the sole occupant, at other times, the crew will be the only occupants, and in still other cases, the occupants will consist of the crew and more than a hundred passengers.

Any mission which results in death or injury to an occupant is not a successful mission. Successful missions must constantly be accomplished if civil aviation is to continue to grow and progress. This paper will indicate the ,role of aeromedical research in helping to prevent unsuccessful missions.

Involved in the safety of a mission are the matters of providing assurance that one aircraft in Height will not jeopardize another, and that the operation of an aircraft will not needlessly endanger the lives or property of the population-at-Large.

W. F. Roeser, T.E. Lonberger

Various methods used for testing thermocouples and thermocouple materials and the precautions that must be observed in order to attain various degrees of accuracy are described. In particular, the methods that have been developed and used at the National Bureau of Standards are outlined in detail, and some guidance is given to the reader in the selection of the method best adapted to a given set of conditions.

James D. New & Charles M. Middlesworth

A gas analyzer for evaluating aircraft fire-extinguishing systems was calibrated for use with carbon dioxide, methyl bromide and bromochloromethane. Extensive application of the analyzer in evaluating the carbon dioxide system of the XB-45 power plant provided it to be of practical value. Operation of the instrumentation flight proved satisfactory.

R.J. Leong

Epoxy resins are among the most versatile of modern plastics. They have been employed extensively in industry for surface coatings, high-strength adhesives, durable laminates, cold solders, and lightweight foams.