Description
In order to secure a more adequate sealing for the protection of the explosive in the 11.75-inch and 5.0- inch rocket heads from the hot gases during the burning of the motor, the base fuzes were modified in that a projectile-type gas check was added around the fuze body ahead of the threads. The fuzes are shipped assembled in the base of the head. The lead washer with copper hood is pressed into place at the loading activity, and is not to be disturbed in the fields.
The Base Fuze Mk 157 Mod 2 is the Base Fuze Mk 157 Mod 1 with the projectile-type gas seal; the Base Fuze Mk 159 Mod 1 is the Mk 159 Mod 0 with a projectile-type gas seal. These fuzes will be replaced by the Base Fuzes Mk 163 Mod 0 and Mk 164 Mod 0 respectively.
Functioning
No information about functioning.
Hazardous Components
No information about hazardous components.
See Also
Source(s)
OP 1664, Volume 1 - US Explosive Ordnance (1947)
