E.D. Ayson

The fuel system installed in the Boeing Model 747 airplane is described in general, and the pressure fueling system treated in detail.

The general treatment includes description of fuel tanks, engine fuel feed system, fuel jettison system, defueling system, fuel quantity indicating system, and fueling system. The component parts of the pressure fueling system are described, and performance of the system is evaluated.

In the design of the 747 airplanes, surge pressures and static electrification, possible problem areas associated with refueling large airplanes, have been minimized. The fuel system of he 747 meets applicable Federal Aviation Regulations and customer requirements.

J.J. Comeford

Measurement were made of the spectral distribution of energy from radiant sources employed in standard test methods of flammability.

George Chamberlain

For a number of years, the Federal Aviation Administration (FAA) has been active in the field of testing and evaluation of aircraft powerplant fire-extinguishing systems. In this area, the FAA has supplied the specialized test equipment and experienced personnel necessary for such testing and has been, essentially, the sole organization providing these services within the United States. This report describes the specialized test equipment, provided criteria for the installation and operation of this equipment, and provides the guidelines for utilization of the equipment for the conduct of meaningful test programs.

The extinguishing agent concentration recorder, as specialized gas analyzer test equipment, and its operational principle are described. Guidelines are presented for the location and installation of extinguishing agent concentration sampling probes within the test article. Also included in the report are sections concerning importance of agent distribution system conformity; factors which influence agent distribution and concentration; suggested flight and ground test procedures; the airflow; and test data form, reduction, interpretation, and presentation. The value and recognition of the utilization of the gas analyzer test equipment as the most effective means of determining the performance of an aircraft extinguishing system are also discussed,

Samuel V. Zinn, Jr

Tests were performed to determine acceptance and/or operational limitation of a laboratory device designed to detect dynamite by odor. The function of the machine is to combat bombing sabotage of aircraft by sampling air vapors within an aircraft prior to takeoff and signaling the presence of dynamite. The tests proved that the machine was very reliable in detecting exposed sticks of dynamite in an enclosed room, but detection was questionable when the dynamite was confined in a container. The conclusion indicate that the Chemosensor represents a substantial step in the direction of a workable production device, but considerable further research will still be required to attain that goal.

Richard G. Hill

To evaluate the capability of the Edison-Ultraviolet Surveillance Fire Warning system in detecting fore from burner-can failures.

Fire detectors in service have detected burner-can failures, but also some have gone undetected and often undiscovered until routine ground inspection. A burn-through impinging on a vital aircraft structure could endanger the entire aircraft if an early detection is not obtained.