R.E. Erickson, R.M. Krajewski

As gelled fuel was modified to achieve low viscosity at low shear while maintinaing signifcant resistance to fire while in the misting condition. The modified gelled fuel has been rheologically profiled using a variety of rheometers. Test data on flowability, rheological characteristics, and simulated crash fire misting hazard are included in the report.

Joseph J. Jaglowski, Jr.

The test program was performed to evaluate the liquid explosive emergency exit system reliability, performance, and hazards to personal safety when exposed to environments which might be encountered before, during and after crash. The report includes: (1) A test program to evaluate the liquid explosive emergency exit system when exposed to environment simulating conditions encountered before, during and after a crash; (2) Results of the tests; (3) Evaluation of a retaining shield in attenuating the sound level and containment of the debris produced by the detonation of the linear-shaped charge: and (4) The feasibility of adapting the liquid explosive emergency exit system use on civil transport aircraft.

Guy S. Brown, Richard L. Sulzer

To determine the minimum system of chevron markings that would give warning of potentially deceptive, nonload-bearing paved areas before a runway threshold, 20 pilots were given systematic exposure in a flight simulator to narrowed and more widely spaced chevron patterns, and also to the present U.S. Standard. The judgments made by these pilots were that both the conventional pattern of full-width chevrons spaced 100 feet apart and a pattern of standard-width chevrons spaced 200 feet apart provided distinct and unambiguous warning of the nonload-bearing surface. Further, they reported that these two patterns were not confusable with other markings such as the runway threshold stripes. Pilot judgments of two patterns with narrowed chevrons were mixed. While a majority reported the narrowed chevrons not confusable, there was a marked increase in the number reporting absence of distinct and unambiguous guidance, particularly when the markings were viewed from a position low on glide slope and offset from the centerline.

Department of Commerce

On November 17, 1970, there was published in the Federal Register (35 FR 17670) a notice of finding that a flammability standard is needed for sleepwear normally worn by young children (5 years and under) to protect the public against unreasonable risk of the occurrence of fire leading to death, injury, or significant property damage.

Federal Aviation Agency

The hazard from smoke generated by fire in occupied spaces has long been recognized and widely discussed. It is generally accepted that impairment of vision, through either light obscuration or eye irritation, is the most significant physical deterrent to escape during the early stages of fire. This is true particularly for fire within a passenger air transport cabin which is normally occupied by a relatively large number of persons who must be evacuated rapidly in the event of fire.