MIL-M-85657, MILITARY SPECIFICATION: MOTOR, ROCKET, 2.75 INCH, MARK 66 MODS (30-MAR-1984) [NO S/S DOCUMENT]

MIL-M-85657, MILITARY SPECIFICATION: MOTOR, ROCKET, 2.75 INCH, MARK 66 MODS (30-MAR-1984) [NO S/S DOCUMENT]., This specification establishes the requirements for the manufacture and inspection of the 2.75 inch Rocket Motor, Mark 66 Mods. The MK 66 Mod 1 and Mod 2 Rocket Motors are intended to propel a wide assortment of warheads at ranges exceeding 6500 meters. They may be fired from either Army rotary-wing aircraft or Navy fixed-wing and rotary-wing aircraft. The basic difference between the MK 66 Mod 1 and Mod 2 Rocket Motors is that the Mod 2 contains a hazards of electromagnetic radiation to ordinance (HERO) filter which allows it to be handled and stored in standard electromagnetic radiation environments, making it HERO-SAFE. The MK 66 Mod 1 is not considered HERO-SAFE.