Bomb bay

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The bomb bay or weapons bay on some military aircraft is a compartment to carry bombs, usually in the aircraft's fuselage, with "bomb bay doors" which open at the bottom. The bomb bay doors are opened and the bombs are dropped when over the target or at a specified launching point.

Bomb bays were born of necessity. Early military aircraft suffered severe

(which would further slow down the already lumbering bomb-laden aircraft) with bombs hanging from the wings or below the fuselage, so military aviation designers moved the bombs inside the aircraft.

Before the introduction of stealth technology bomb bays were mostly used by dedicated bomber aircraft; in fighters and attack airplanes bombs and

which move out on rails allowing the weapons bay to be closed while the missiles still hang outside.

Semi-recessed bomb bay

World War II saw the use of semi-recessed bomb bays which, being an uncommon variation of the fully recessed bomb bay, was a design compromise for aircraft that were intended to carry bombs but did not have sufficient fuselage space for a fully recessed bomb bay; such a design did not allow for the inclusion of bomb bay doors.

were among the few notable aircraft to use semi-recessed bomb bays.

Weapons

Large-sized bombs, which may be

ejector racks

, which allow for larger bomb loads to be dropped with greater accuracy.

standoff missiles

) are often carried in the bomb bays of modern aircraft; the missiles are dropped from the aircraft and then accelerate into autonomous flight while the bomber aircraft "stands off" at a safe distance from the target.

There are multiple different bomb bay configurations, which can include:

The more traditional, fixed

would have mounted stores in vertical columns making individual store selection and release impossible without releasing all stores ahead in the column line. The advantage of a conventional bomb rack is a prompt release of all stores in short order. Bombers like the

B-2

use custom designed bomb rack support structures with their own designation e.g. Common Bomb Rack (CBR), Common Bomb Module (CBM), or Smart Bomb Rack Assembly (SBRA).

These bomb racks may have special store release control mechanisms. Aside from the release options of a rack a pilot can select release mode for releasing one or multiple stores. Stores can be jettisoned selectively in single mode or ripple mode or salvo mode. The term ripple applies to the single- or ripple and single- continuous release mode from one or from mirror stations. Salvo release mode applies to a combination of several stations together e.g. adjacent stations. For multiple store release an interval timer can be set to release stores in fixed time steps. For an external store emergency release there may be a panic button to release all of the weapons.

Rotary launcher

A rotary launcher is a rotating suspension equipment mounted inside the bomb bay. Rotary launchers have stations of their own and offer the ability to select certain stores within the bomb bay for release. Advantages include the selection ability for different weapons and easier loading for the ground crew.

The disadvantage of a rotary launcher is a slow release of stores. The rotary launcher of the B-1 for example requires seven seconds until the next store is rotated into release position.^[1]

An example of the concept is the Common Strategic Rotary Launcher, which was introduced in the 1980s on the B-52 and B-1B to carry the

See also

• Hardpoint