Accession Number : AD0866919

Title :   Helicopter Escape and Personnel Survival System Exhaust Plume Impingement Study.

Descriptive Note : Technical publication Jun-Sep 69,

Corporate Author : NAVAL WEAPONS CENTER CHINA LAKE CA

Personal Author(s) : McCarten, Robert M.

Report Date : FEB 1970

Pagination or Media Count : 54

Abstract : Design of the Helicopter Escape and Personnel Survival System for large helicopters requires that rocket exhaust plumes pass in close proximity to the helicopter body. In this report, an engineering analysis is performed to determine the severity of the problem, with emphasis on taking worst-case examples. Two computer plume prediction techniques were used and three subscale tests using live rocket motors and a helicopter model were performed. A complete study of the problem should include developing equations describing the flow field of the plume about the helicopter body and the heat transfer to the fuselage based on this flow field, but was not performed in this study due to funding shortages. Results indicated that the helicopter body should be able to survive the environment. In the future, it is recommended that an instrumented helicopter cross-section be placed in the exhaust plume of a heavyweight retro motor to verify the safety of the system. (Author)

Descriptors :   *HELICOPTERS, *JETTISONABLE COCKPITS, *RETRO ROCKETS, AEROSPACE SYSTEMS, PARACHUTE DESCENTS, HAZARDS, CARGO PARACHUTES, SOLID PROPELLANT ROCKET ENGINES, ROCKET NOZZLES, TURBULENCE, PREDICTIONS, TEMPERATURE, FLOW FIELDS, FLOW FIELDS.

Subject Categories : Gliders and Parachutes
      Safety Engineering
      Escape, Rescue and Survival

Distribution Statement : APPROVED FOR PUBLIC RELEASE