OP 1664 - U.S. Explosive Ordnance (Vol. 1); Part 2 - Rocket and Rocket Fuzes; Chapter 5 - Primers and Tracers; Section 2 - Army Rockets (Service Type): 3.25-inch Target M2, M2A1, M2A2

U.S. EXPLOSIVE ORDNANCE

PART 2 - ROCKET AND ROCKET FUZES

Chapter 5 - ROCKET BODIES

Section 2 - ARMY ROCKETS (SERVICE TYPES)

3.25-inch Target M2, M2A1, M2A2

Over-all length, inches	59
Width across fins, inches	24
Weight, pounds	37.5
Propellant weight, pounds	3.2
Range, yards	1,700
Maximum velocity, ft./sec.	530
Burning time of flare, seconds	30

General: This is a high-speed target for firing pratice with automatic A.A. weapons.

Propellant: The propellant has grains five inches long and 7/8-inch in diameter, with a 5/16-inch axial hole. It is ignited by an electric squib.

M2A1: When a flare is added to the 3.25-inch Target Rocket M2 for antiaircraft tar-get practice at night, the resulting projectile is designated as the M2A1. The flare burns for 30 seconds from the beginning of flight.

M2A2: This design has a flat nose, to which is threaded a yellow flare for both day and night tracking. It also has a different system for igniter contact: the lead wires pass in turn through the nozzle and an inner fiber closing cup and connect to a household-type service plug, which is held by an outer fiber-board closing cup. There are 18 inches of igniter cable coiled between the closing cups, to allow ample lead for connecting to the launcher.

Figure 117. 3.25-inch Target Rocket M2A2