- Author
-
Hansberry, H. L.
- Title
- Aircraft Fire Extinguishment. Part 5. Preliminary Report on High-Rate-Discharge Fire Extinguishing Systems for Aircraft Power Plants. Technical Development Report 260.
- Coporate
- Civil Aeronautics Administration, Indianapolis, IN
- Report
-
CAA TDR 260,
February 1956,
12 p.
- Keywords
-
aircraft fires
|
fire extinguishment
|
discharge rate
|
fire extinguishing agents
|
fire tests
|
air flow
|
nacelle fires
|
turbojet engines
- Identifiers
- High-Rate-Discharge (HRD); XR60-1 aircraft power plants; XB-45 aircraft power plants
- Abstract
- In this report provisional formulas based on data obtained during fire tests of XR60-1 and XB-45 aircraft power plants are derived for the design of adequate high-rate-discharge fire extinguishing systems in potential fire zones. These formulas apply to zones through which there is high airflow and in which the internal surfaces are smooth, and to zones through which there is very little or no airflow and the internal surfaces are rough to any degree. Tests have shown that zones of high airflow with uneven internal surfaces require quantities of extinguishing agent far in excess of quantities required for zones of equally high airflow but with smooth internal surfaces, the difference being as much as 200 per cent. Because of insufficient data on the effects of various degrees of surface unevenness on extinguishing agent requirements, the important "turbulence factor" is not established in this report. The information presented in this report was obtained in tests of only one piston-engine power plant and one jet power plant. Accordingly, much still remains to be learned regarding the precise requirements for either type of installation. The suggested quantities and discharge rates are conservative and may be expected to decrease appreciably as additional data are obtained on other installations.