assembly (fig. 1-27) is a retarding fin. It is used with
the 500-pound LDGP, Mk 82 and Mods bomb. The fin
assembly presents a low-drag configuration when
dropped in the unretarded position and a high-drag
configuration when in the retarded position.
The fin support tube is the main structure of the fin.
It provides a means of attaching the fin assembly to the
bomb. On Mod 4 and Mod 4A fins, the fin is attached
by eight setscrews (fig. 1-28).
On the Mod 4 and Mod 4A fins, the shock is
absorbed by the crushing of a convoluted steel tube. The
fin support tube has a fuze mounting ring for attaching
the tail drive of a mechanical tail fuze
The fins are spring-loaded and secured in the closed
position by a spring-loaded release band. The release
band lever (fig. 1-28) is prevented from opening by a
cotter pin which stays installed until an arming wire is
installed. The fin assemblies have drilled holes at the
top and bottom of the forward end for installation of
arming wires when the weapon is being configured for
electric tail fuzing.
MAU-91A/B FIN ASSEMBLY. The MAU-
91A/B fin assembly (fig. 1-29) is a retarded tail fin used
with the 1,000-pound LDGP bomb Mk 83 and Mods.
This fin assembly can be dropped in either the retarded
or unretarded position.
Figure l-27.Mk 15 fin with Mk 82 bomb body.