The inner structure (fig. 7-9) of the magazine is in the center of the outer shell. It is made up of three sections: top, middle, and bottom.

The top inner structure is essentially a cylindrical shell with several mounting pads. The magazine hydraulic power supply main tank and the train and elevation hydraulic power drive main tank are integral parts of the top section. This section also contains a missile restraint ring similar to the one in the outer shell.

The middle inner structure has openings and components for the warmup electrical contact ring. The RSR radial bearings are in the rims at the top and bottom of this section.

The bottom inner structure, the shortest of the three sections, has five rectangular openings. Three of the openings have covers that provide access to a ring gear, warmup contractors, and a hoist track. The other two openings are for the RSR drive pinion and drive housing.

Base

The magazine base (shown in fig. 7-8) is at the bottom of the magazine structure. Its main components are a base structure, a plenum cap, a flametight hatch, 96 blow-in plates, and 96 water injectors. The base adds lateral strength to the outer shell, contains all the magazine service connections, and houses the missile

Figure 7-9.-Inner structure.

water injection system. If a missile ignites in the magazine, the plenum chamber receives the exhaust gases and conducts them to an elbow-shaped duct at the edge of the chamber. From here, the gases escape into the atmosphere.

The plenum cap contains a total of 96 compartments under the RSR cells. Under the 16 inner ring cells, there are 3 compartments for each cell (48). Under the 24 outer ring cells, there are 2 compartments for each cell (another 48). As a result, a compartment is always underneath each missile for any of the 32 possible RSR index positions. Each of the 96 compartments holds a blow-in plate assembly and a water injector nozzle.

Ready Service Ring (RSR)

The RSR (fig. 7-10) is a separate rotating structure inside the magazine between the inner structure and the outer shell. It indexes the cells clockwise or counterclockwise to deliver selected missiles to the inner or outer hoist positions. A station-at-hoist interlock switch produces a lamp indication on the EP2 panel, informing the operator which cell is at the selected hoist position.

A hydraulic B-end motor inside the inner structure drives the RSR. A speed reducer, consisting of a series of gear trains enclosed in a housing, connects the B-end output shaft to a speed reducer drive pinion. The pinion meshes with the RSR circle (ring) gear. Two radial

Figure 7-10.-Ready service ring.

bearings support the RSR laterally on the inner structure. Twenty-four roller assemblies fastened to the upper RSR rim between each cell support the RSR vertically. These rollers ride on a roller path mounted on the outer shell. A positioner (or latch) under the RSR locks the structure in any one of 32 index positions. The positioner blade engages locking clevises along the lower circumference of the RSR.

A magazine contactor is at the bottom of each cell. As a missile lowers into a cell, a male-type connector plug in the contactor enters a female-type receptacle in the base of the missile. That establishes system-to-missile connection. Through this device, missile cell identification circuits are possible.

Each cell has one full-length magazine rail that guides and supports the missile and hoist chain. A

Figure 7-11.-Magazine hoist. 7-14

missile latch near the bottom of the rail locks the aft shoe of the missile in the cell. On the opposite wall of each cell is a forward-shoe retainer. It engages one of the forward shoes to help steady the missile in the cell. Also, at the bottom of each cell is a flame cone. The cone directs the flame of an ignited missile into the plenum chamber. Access to each cell is through individual doors along the lower inner and outer walls of the RSR.