Marvin F. Rammelsberg, Paul R. Dierdorf

A surveillance-type flame detector system of the Protector design was evaluated in laboratory bench-type tests and by exposing the units to more than 250 small-magnitude JP-4 test fires in a modified KC-135 nacelle which had a comparatively low internal air flow.

Laboratory bench testing showed the detector’s sensitivity decreased as the ambient light increased. In the KC-135 power plant tests the system detected 93 per cent of all the fires to which it was exposed. It functioned satisfactorily under several engine power conditions and had a consistently short response time.

Rosslyn Metal

Rosslyn Metal is a clad material consisting of a copper core, metal-surgically bonded on both sides to stainless steel or Inconel.

Charles A. Hughes

A series of tests was conducted to study the sealing requirements of firewalls to prevent passage of flames. The particular conditions chosen for the tests were probably the most severe which could exist; namely, those with fire burning against one side of the fire wall and an explosive mixture of gasoline and air on the opposite side. Under those conditions the maximum hole size which would not allow flame passage was determined.

John Crouch

The purpose of the addendum is to present additional fuel, lubricant and hydraulic ignition temperature data applicable to DC-8 engine compartment design.

W. Reeves, G. Dake, L. Chance, J. Guthrie

A new group of polymers made by reacting tris (1-azirdinyl) phosphine oxide, referred to as APO or tris (1-azirdinyl) phosphine sulfide, referred to as APS, with tetrakis (hydroxymethyl) phosphonium chloride, referred to as THPC, are good permanent type flame retardants for cotton. All three of theompounds are water soluble crystalline materials. This application of APO- or APS-THPC resins to textiles consists of padding fabric in aqueous solution of the compounds, drying the fabric, curing it about 140 degrees C. for about 5 min. to polymerize the compounds and then rinsing the fabric to remove any unpolymerized materials.

About 8% of the resins in 8-oz. Cotton twill or sateen is adequate to make the fabric pass the vertical flame test before or after 15 laundering. The flame resistance is also followed by an acid fluoride sour after each laundering. The flame resistance is also very durable to boiling alkaline soap solutions.

The properties of fabric treated with these new polymers are, in general, excellent. The hand and strength of the fabric is only slightly different from that of untreated fabric. The flame resistant fabrics are to rot and mildew.