Paul M. Rich, Warren G. Cook, Richard L. Sulzer, Peter R. Hill

A series of six experiments was conducted that have application to the development of Pilot Warning Instruments (PWI). The experiments were concerned with the effect of warning rates on pilot performance, pilot response to imminent collision threats, the evaluation of scanning patterns, the value of warning-only, the effect of relative motion on pilot performance, and the effect of PWI display sector size. The results of these experiments offer a variety of useful data in the area of visual collision avoidance.

Gerald R. Slusher

A method was developed using the Society of Automotive Engineers (SAE) smoke numbers for calculating the exhaust smoke transmission for turbine engines, number of plume paths, and viewing angles. Criteria were developed relating the SAE smoke number to engine airflow and thus to engine size for conditions of visible and invisible smoke. Transmission of multiple plumes was calculated and presented.

Department of the Army - SP4 Phillip Delduke

An Engineering Test of Winter Flight Clothing System was conducted from January 1971 to October 1971 at USAGETA except for the thermal protection phase which was conducted concurrently at U.S. Army Aeromedical Research Laboratory, Fort Rucker, Alambama, In March 1971. Technical charactristics of the experimental underwear were ascertained and a comparative evaluation made with the standard item.

James W. Ross, Jr.

The study criteria focused on the effects of multiple exposure to the proposed disinsection environment under representative flight conditions.

George Chamberlain, Eugene Klueg

Proposals have been made to carry relatively large quantities of liquid nitrogen (LN2) aboard commercial aircraft for the purpose of fuel tank inerting. Secondary uses such as powerplant fire extinguishment, have been suggested. Testing was conducted at the National Aviation Facilities Experimental Center to determine the feasibility of using LN2 as an aircraft powerplant fire-extinguishing agent and also to determine the characteristics of LN2 when used as an extinguishant. These tests were conducted in a fire test facility using a full-scale aircraft turbojet engine and nacelle for subsonic low altitude flight condition simulation and also in a mockup engine/nacelle facility where nacelle volume and airflow could be varied. For all tests, the LN2 was delivered from a dewar where it was stored under pressure as a saturated liquid. All fire tests were conducted using JP-4 jet fuel which was spray released and spark ignited. In addition to the preliminary feasibility study, this report describes the experimentation conducted to determine the qesign criteria required for an effective agent quantity, discharge rate, discharge conditions, and distribution system configuration. The report also describes the effects of-an inadvertent discharge on engine ""components, the effects of a damaged cowling, and the cooling of potential reignition sources.