in a lightweight, disposable metal crate (fig. 1-25).
Some fin assemblies are shipped with bomb lugs
attached to the shipping crate, depending upon
the particular Navy Ammunition Logistics Code
Two types of fins are described in this part of the
TRAMANconical and Snakeye. The conical fin is
used for the unretarded mode of delivery, and the
Snakeye fin assembly can be used for either the
unretarded or retarded mode of delivery.
The typical BSU-33 conical fin assembly (fig. 1-26)
is steel, conical in shape, and has four fins to provide
stability. Access covers, attached by quick-release
screws, are located on the sides of the fin body,
providing access for dearming and inspections. There
is a drilled or punched hole at the top and bottom of the
forward end of the fin body. This hole is used to install
an arming wire when the bomb is being configured for
electric tail fuzing. The fin is attached to the aft end of
the bomb, and is secured in place by tightening the fin
setscrews into the V-groove of the bomb.
The conical fin may be used with all Mk 80 (series)
bombs. The basic difference between the types of
conical fins is their physical size; the larger the bomb,
the larger the fin.
Snakeye Fin Assemblies
Snakeye fin assemblies are used with the Mk 82 and
Mk 83 LDGP bombs. They are capable of delivering
bombs at high speed and low altitude without the danger
of damaging the aircraft from ricocheting bombs or
fragments, A physical description of both fin
assemblies and the principles of operation are discussed
in the following paragraphs.
MK 15 AND MODS SNAKEYE FIN
ASSEMBLY. The Mk 15 and Mods bomb fin
Figure 1-26.Typical fin assemblies.