G.S. Lu

This program was directed at the evaluation of two high temperature tapes which indicate initial compatibility with existing low temperature tapes presently used in the majority of commercial aircraft today.

George B. Geyer, Lawrence M. Neri, Charles H. Urban

A series of six tests was conducted using a single barrel mechanical foam nozzle discharging 1,800 gallons of foam solution per minute (English/metric conversion factors are given in Appendix A). Three experiments were conducted with protein foam and three using aqueous-firm-forming-foam (AFFF). The tests were designed to dispense foam solution at a fixed rate in simulated full-scale fire modeling experiments in which the fire area was smaller than the total area of foam application, thereby conserving fuel and reducing atmospheric contamination. The time required to foam-cover concentric circular diked areas of 12,000, 18,000 and 36,000 square feet containing a three-dimensional fire in a 2,827 square foot fire-pool was determined. The foam quality and ground patterns produced by each agent were determined for solution rates of 840 and 1,800 gallons per minute.

Constantine P. Sarkos

Recommendations to support regulatory proposals.

R.W. Rosser, J.A. Parker

The status of high-temperature fuel tank sealants for military and potentially commercial supersonic aircraft is examined. The interrelationships of NASA's sealants program comprise synthesis and development of new fluoroether elastomers, sealant prediction studies, flight simulation and actual flight testing of best state-of-the-art fluorosilicone sealants. The technical accomplishments of theseprojects are reviewed.

Richard G. Hill

This paper describes the results of small-scale and full-scale tests conducted to determine the oxygen concentration (minimum nitrogen) limit in the fuel tank ullage that would prevent an explosion when the tank is exposed to an external ground fire. The results indicated that an oxygen concentration of nine percent or less would prevent any fuel tank explosion due to a post-crash fire. Full-scale tests confirmed the results of the small-scale tests.