TM 10-1670-305-23&P, US Army, Technical Manual, AUTOMATIC RIPCORD RELEASE, AR2, MODEL 451, NSN 1670-01-369-7914, TEST CHAMBER ASSEMBLY, AR2, MODEL 452, ... AR2, MODEL 453, NSN 1670-01-468-9471, 2000

TM 10-1670-305-23&P, US Army, Technical Manual, AUTOMATIC RIPCORD RELEASE, AR2, MODEL 451, NSN 1670-01-369-7914, TEST CHAMBER ASSEMBLY, AR2, MODEL 452, NSN 1670-01-370-0752, ELECTRONIC TEST CHAMBER ASSEMBLY, AR2, MODEL 453, NSN 1670-01-468-9471, 2000

SCOPE
Type of Manual: Operators Unit and Direct Support Maintenance Manual (including Repair Parts
and Special Tool List).

Model Numbers and Equipment names: Automatic Record Release, AR2, Model 451
Test Chamber Assembly, AR2, Model 452
Electronic Test Chamber Assembly, AR2, Model 453


Purpose of Equipment: The Automatic Ripcord Release. Model 451 (hereinafter referred to as
AR2) automatically pulls the ripcord pins on a free falling parachute at a predetermined altitude.
The Test Chamber Assembly, Model 452 and the Electronic Test Chamber Assembly, Model 453
are designed to test the AR2.