1,600-pound "Bat" S.W.O.D. Mk 9 (Air-to-Surface Missile)

Over-all lenght, feet

Wing span, feet

Total weight, pounds

Warhead

Fuzing

Nose - Mk 235 Mod 0
Tail - Mk 236 Mod 0

General: S.W.O.D. (Special Weapons Ordnance Device) Mk 9, or "Bat", is a glide bomb equipped with a radar homing set mounted in the nose. It is designed primarily for attac-king marine targets, and is effective for night or day attacks upon shipping in any weat-her in which the parent plane can fly. The launching planes need not stay in the vicinity of the target, and may release as many as four of these missiles in salvo.

The airframe consists of plywood sections which are fitted around the Bomb AN-M65. Control surfaces consist of an eleven on each wing which can be moved to control pitch or bank. There are no control surfaces on the tail.

To ensure destruction of the intelligence system, the Demolition System Mk 122 is used.

Installation of the Fuze Mk 235 and Mk 236, with their outside windmills and flexible arming stem, is standard.

Control: This missile has its own radar transmitter and receiver. When the target is located on the scope of the monitor unit in the plane, it is put into the range step of the missile's scope and is automatically kept there. At the correct instant, determined by a glide ratio scale, the missile is released and is guided to its target by the radar signal in its own scope. The guiding radar supplies corrections to the servo system, which is also controlled by a gyro pilot, the device which maintains flight altitude.

Suspension: Standard bomb lugs are employed on the airframe. Also, there is the multi-conductor cable connecting the missile's radar with the monitor set in the plane, known as the umbilical cord.

Demolition system: This destructor assembly consists of the S-122-11G switch, Juncion Box Mk 1 Mod 0, primacord connectors, and ten Demolition Charges Mk 4. The S-122-11G switch incorporates an inertia weight, held by a spring tenison of 11g, which will topple if that force is exceeded in an impact. When this inertia weight topples (it is mounted on a universal pivot) the contact bar, which has been transmitting the spring tension to the inertia weight, rotates because of the spring load and completes the elec-trical circuit across the contacts. This switch has an arming stem, connected to windmill vanes mounted on the outside of the missile fuselage, which unscrews to arm the switch. These vanes have an arming wire to prevent rotation before release from the pa-rent aircraft. On one side of the switch ia a clear plastic inspection port. Tension on the spring is pre-set at 11g when the switch is assembled at the factory.

When the switch completes the circuit, currrent from the battery sets off the electric blasting cap in the junction box, which fires the primacord connectors and then the TNT blocks, placed around the intelligence unit.

Remarks: The S.W.O.D. Mk 9 is commonly kown as "the 1,000-pound Bat". The S.W. O.D. Mk 10, built around a 2,000-pound bomb is not being actively developed, because it is felt that the 1,000-pound size is large enough for currently projected uses.

Figure 377. "Bat" Missile, Showing Location of Warhead

Figure 378. Battery, Inertia Switch, Junction Box and
Connectors of Demolition System Mk 122

Figure 379. Location of TNT Blocks in Demolition System Mk 122

Figure 380. S-122-11G Inertia Switch