AUTOMATIC RIPCORD RELEASE, MODEL 451 EQUIPMENT DESCRIPTION AND DATA

TM 10-1670-305-23&P AUTOMATIC RIPCORD RELEASE, MODEL 451 0002 00 EQUIPMENT DESCRIPTION AND DATA EQUIPMENT CHARACTERISTICS, CAPABILITIES AND FEATURES CHARACTERISTICS Senses rate-of-fall and altitude above mean sea level (MSL) (not above ground level (AGL). Altitude dial is graduated to permit settings from 500 feet to 25,000 feet. AR2 actuates when it falls through a preselected altitude at a fall rate of 80 ft/sec or greater. CAPABILITIES AND FEATURES Automatically removes ripcord pins on the parachute at a predetermined altitude. Designed to remove ripcord pins on the reserve parachute but can be used with main parachute. LOCATION AND DESCRIPTION OF MAJOR COMPONENTS The AR2 basically consists of an aneroid with associated mechanism, rate-of-fall sensing chamber, and a spring-loaded power cable. All components except the power cable and its flexible conduit are contained in a housing. The housing provides all required chamber, passages and mounting pads for each component. An altitude setting dial and JUMP/OFF switch are mounted on the housing. The power cables end in a fixed eye, which connects to the parachute ripcord pin. A lanyard assembly is attached to the power cable to protect the open end of the power housing when detached from the AR2. 0002 00-1 Change 1