Description
The window rocket is designed to be fired from Naval vessels equipped with a modification of the present shipboard launcher. The round carries a payload of paper-coated metal foil strips which are scattered in the air by a delayed-action charge. The payload is ejected at an altitude of 1,200 feet and range of 2,000 yards at 40° elevation.
The window rocket consists of a 3.5-inch Rocket Head Mk 10 Mod 0, Mk 14 Mod 0, or Mk 15 Mod 0 and a 3.25-inch Rocket Motor Mk 12 Mod 0, Mk 14 Mod 0, or Mk 14 Mod 1. The motor uses the propellant grain Mk 7 Mod 1, weighing 2.80 pounds.
The rocket head contains a 3.5-inch rocket head load - Mk 2, Mk 8, Mk 4, Mk 6, or Mk 8 - which is housed in a split steel ejection liner. It has a closure adapter on the after end, an obturator cup for sealing the front end, and a solid wood ogive cap retained by three aluminum rivets in the Mk 10, hollow steel friction fit in the Mk 14 and Mk 15. The closure adapter, which is welded to the after end, carries a copper diaphragm plate with a firing pin, and also serves as a chamber for the Cal. 32 blank cartridge which ignites the fuze. The Fuze Mk 134 consists of a plastic case containing a length of Ensign Bickford fuse and a 20 gram ejector charge of black powder.
The Motors Mk 12 Mod 0 and Mk 14 Mod 0 carry adjustable lug bands; the lugs are welded to the Motor Mk 14 Mod 1. The Mk 14 Mod 0 and Mk 14 Mod 1 have a metal base cap during shipping, to protect the electrical connector.
The Head Mk 15 Mod 0 is one inch longer than the Head Mk 14 Mod 0.
Functioning
No information about functioning.
Hazardous Components
No information about hazardous components.
See Also
Nothing else to see.
Source(s)
OP 1664, Volume 1 - US Explosive Ordnance (1947)
