Robert Allen

As requested in the subject letter, the following is a technical evaluation of each individual public response to the regulatory notice on smoke emissions. Generally, only arguments or views not having previously been introduced were evaluated for each successive respondent.

R.S. Alger

The results of an experimental study of the burning JP-5 and methanol pools emphasize structural differences between JP-5 and methanol fires as well as the importance of radiant feedback of energy to the pool surface in controlling rates of burning.

Marjorie W. Sandholzer

In recent years, decided advances have been made in the development of durable flame proofing treatments for textiles, with the work largely directed toward meeting the needs of the military services. The treatments developed have found civilian application primarily in the field of interior furnishings in the execution of large decorating contracts, such as in hotels, theaters, and ships, Flame proofed fabrics have not been offered generally to the public at the retail level and it appeared that information regarding the effects of available treatments on fabrics suitable for clothing and other home purposes would be useful.

In the present study seven different flame proofing treatments were applied to 20- to 25-yard pieces taken from one or more of five selected fabrics. The original and flame proofed fabrics were tested for flame resistance by three different methods, for breaking strength, and for tearing strength. The fabrics were also laundered repeatedly and tested by the same methods to show the durability of the flame proofing in laundering. The materials and procedures used are described, and the results obtained are discussed in this paper.

Constantine P. Sarkos

The use of a Halon 1301 fire-suppression system was evaluated in regard to increasing occupant escape time during a ground crash situation with an external fire adjacent to a cabin opening. Tests were conducted in a DC7 fuselage, varying the exit configurations and external wind conditions. Tests were also conducted using a curtain to compartmentize the cabin, with the Halon 1301 concentration and location of discharge being varied. Smoke, temperature, carbon monoxide, oxygen and Halon 1301 levels were continuously monitored during the tests at various locations throughout the cabin. Hydrogen fluoride (HF) and hydrogen bromide (HBr) concentrations were obtained by analyzing samples taken from the cabin at various times. The results indicted that the length of protection from flame penetration through an opening was department upon external wind conditions. Flame penetration was controlled for up to 3.5 minutes with zero wind, but a wind of as little as 2 miles per hour (mi/h), the time was reduced to less than 15 seconds. High HF levels were rapidly inside the cabin, with concentrations ranging from 60 parts per million (p/m), with no wind, to well over 300 p/m with 2-mi/h wind conditions. Test results also indicated that the use of a curtain to compartment the cabin could slow the spread of HF (15 to 20 seconds), but it does not lower the levels

S.L. Hartford

Polyamides are one of a growing number of classes of thermosetting resins which offer very high thermal stability and high temperature mechanical strength.