! Bomb body
! Suspending lugs
! Fin assemblies
The bomb body (fig. 8-1) is a metal container that
contains the high explosive charge. There is a threaded
cavity in both the nose and tail of the bomb body that
allows the various fuzing applications. The bomb body
also has threaded cavities for the installation of
suspension and/or hoisting lugs. The rear charging
tube, forward charging tube, charging receptacle, and
charging receptacle plug are installed in the bomb body
during the manufacturing process. These are used with
various fuzing operations.
Suspension lugs (fig. 8-1) are used for attaching the
assembled bomb to the aircraft's suspension and
releasing equipment. The lugs screw into the bomb
body in pairs. They are spaced either 14 or 30 inches
apart, depending on the size of bomb. During loading,
the lugs engage the bomb rack suspension hooks,
securing the bomb to the aircraft.
There are various fuzing combinations for the
bomb body, depending on tactical requirements. Fuzes
are divided into two broad categoriesmechanical and
electrical. Mechanical and electrical fuzes can be
installed in either the nose and/or tail of the bomb body.
These fuzes are maintained in a safe condition by the
insertion of a safety cotter pin or arming wire through
the arming vane and the fuze body. Mechanical fuzes
are activated by means of an arming wire or lanyard, or
aircraft-carried equipment to the fuze as the weapon is
released from the aircraft. When the mechanically
fuzed weapon is released and falls away from the
aircraft, the arming wire is pulled from the arming
vane. This allows the arming vane to rotate in the
airstream, arming the fuze. For emergency or other
tactical reasons, the pilot has the option of permitting
the arming wire to fall with the weapon. When the pilot
uses this option, the arming vane can't rotate.
Therefore, the weapon remains in an unarmed
condition. When an electrically fuzed weapon is
released from the aircraft, it receives the necessary
electrical voltage signal from the aircraft firing circuits
to arm the fuze.
Fin assemblies provide bomb stability and cause it
to fall in a smooth, definite curve to the target.
The conical fin (fig. 8-1) is used for the unretarded
mode of delivery. The Snakeye fin assembly is used for
either the low drag, unretarded (fig. 8-2, view A) or
high drag retarded (fig. 8-2, view B) mode of delivery.
Low-level bombing requires the retarded mode of
delivery. The aircraft and the weapon are traveling at
the same speed at the time of weapon release. This
means the weapon and the aircraft will arrive at the
target together, which could result in explosion damage
to the aircraft. Therefore, use of the retarded mode of
delivery retards (slows down) the weapon so the
weapon gets to the target after the aircraft has passes.
The explosion occurs after the aircraft passes the target.
Mk 80 series LDGP bombs are painted an olive
drab color overall. A single or double yellow band
painted around the nose of the bomb body identifies a
high-explosive hazard. The double yellow bands
indicate that the bomb body is thermally protected. This
protection increases the weapon's cook off time if the
weapon is engulfed by fire.
properties as service-type bombs; however, they
contain no explosive filler. Therefore, practice bombs
are safer to use when training new or inexperienced
pilots and ground handling crews. Practice bombs are
inexpensive and can be used in more target locations.
There are two types of practice bombsfull-scale
and subcaliber. Full-scale practice bombs are about the
same size and weight as service bombs. Subcaliber
practice bombs are much smaller than the service
bombs they simulate.
Full-Scale Practice Bombs
The full-scale practice bombs are the Mk 82, 83,
and 84 series LDGP inert bombs. Each bomb can be
configured with the same components, such as fuzes,
fins, and suspension lugs that are used with service
bombs. The Mk 80 series practice bombs have an
overall blue exterior or an olive drab exterior. Mk 80
series bombs also have a blue band around their nose
and the word INERT in 1-inch letters on the exterior
Subcaliber Practice Bombs
There are two types of subcaliber practice
bombsthe Mk 76 Mod 5 and the BDU-48/B.