Mark Muller, Richard Greenwood, Marvin Richards, Lindley Bark

The primary goals of this study were (1) to evaluate rotorcraft flotation system performance in water related incidents and accidents and (2) to identify areas of potential improvements of.rotorcraft flotation system operation and occupant fatality reduction. Four tasks were conducted: a survey of both civilian and U.S. Navy rotorcraft flotation technology, a review of civilian flotation accident and incident data, definition of generic flotation system improvements, and evaluation of available analytical methods for assessing flotation system performance. This study suggested upgrades of the civil regulations and potential design improvements to current deployable flotation systems. Further development work is required to determine the effectiveness of the proposed design improvements. Existing analytical methods for four significant aspects of the water landing sequence were described.

Thor I. Eklund

The characteristics of converging-diverging nozzles are compared to those of converging nozzles for use in aircraft cabin smoke control. The peak flow flight regimes for the two different nozzles are compared by means of test data taken on a Boeing 757. The converging-diverging nozzle is shown as capable of maintaining peak volumetric flow over a wide range of airplane cabin pressure and flight altitude combinations. Sample capacities and flow schedules are presented for installation of converging-diverging nozzles in Boeing 737 aircraft.

Patricia Cahill

Vertical flammability tests specified by the Federal Aviation Administration (FAA) under FAR 25.853 were performed on a variety of interior materials removed from surplus DC-lO, B-707, and B-747 aircraft in order to verify their continued fireworthiness. It was determined that the large majority of materials were in conformance with the test requirements. Exceptions were urethane foam ducting insulation and two composite panels due to the flammable nature of their adhesives.

International Halon Replacement Working Group

The results of the survey sent to airlines and airframe manufacturers on lavatory trash receptacle fire suppression agent preference are complied in this report. Tests are recommended to define the quantity of water required for fire extinguishment.

Compiled by Galaxy Scientific Corporation

This publication contains the proceedings of the International Conference on Cabin Safety Research held in Atlantic City, New Jersey, November 14-16, 1995. Presentations were made and break out sessions were held in the following areas: evacuation, in-flight emergencies, crash dynamics and fire safety.