United States Navy- Canadian Forces Solid State Flight Data Recorder/Crash Position Locator Experiment on the B-720 Controlled Impact Demonstation

摘要

A prototype Solid State Flight Data Recorder/Crash Position Locator (SSFDR/CPL) developed jointly by the United States Navy/Canadian Forces was installed, tested, and evaluated aboard the Federal Aviation Administration/National Aeronautics and Space Administration B-720 Controlled Impact Demonstration (CID) on 1 December 1984. The SSFDR contained eight Electronically Erasable Programmable Read Only Memory silicon nitride oxide semiconductors with prerecorded (alternating ones and zeros) data. The CPL Radio Beacon Airfoil (RBA) contained a duel frequency (121.5 and 243 MHz) emergency locating beacon and a Visual Marker Strobe (VMS) powered by a lithium sulpher dioxide (LiS02) battery pack. The B-720 RBA installation also included an improved prototype squib actuated release system. The SSFDR/CPL/RBA was designed to be released by a frangible switch in the belly of the B-720 upon crach impact. However, the RBA did not deploy from the aircraft until after it was exposed to the initial fuel fire and until sliding aircraft came to rest. Upon RBA deployment, the CPL transmitted on both frequencies for about 5 to 10 sec before being shorted by the ingress of crash fluids into the RBA cavity containing the Transmitter Module Assembly.