- Author
-
Hefty, R. W.
- Title
- Performance of Continuous Linear Heat and Fire Detectors for Naval Aircraft. Final Report. May 1994-December 1995.
- Coporate
- Naval Air Warfare Center, Warminster, PA
- Sponsor
- Naval Air Systems Command, Washington, DC
- Report
-
NAWCADWAR-96-10-TR,
February 2, 1996,
49 p.
- Distribution
- Available from National Technical Information Service
- Keywords
-
military aircraft
|
heat detectors
|
fire detectors
|
thermistors
|
signals
|
fire alarm systems
|
fire detection systems
- Identifiers
- aircraft overheat
- Abstract
- The performance of three types of overheat and fire detection alarms were investigated - those employing thermisters, eutectic salt mixtures, and gas-generation compounds. These were tested using a standard laboratory propane burner fixture which permitted various exposure periods and flame temperatures to be used while observing the "alarm" and "reset" behavior of the detector systems. Two samples each of the thermister and eutectic salt elements were evaluated, whereas five samples of the Titanium hydride elements were subjected to the same evaluation. The elements did not always meet the requirement of MIL-F-7872 for the system automatically to clear the alarm signal (reset) in not more than 30 seconds following extinguishment of the fire. Elements with lower alarm temperature ratings had higher reset times because longer cool-down times were required to clear the alarm.