Description
Upper portion of body houses the vane hub, which is secured by bearing pins, and is threaded into the lower body and held by a grub screw. The striker body, threaded into the pressure plate, is prevented from rotating during the arming time by a shear wire and a locating stud. Two grub screws engage the keyway in the vane hub and allows the pressure plate to rotate with the vane hub.
It differs from the A-1(a) in that the fuze body below the thread is substantially longer while the fuze body above the threads is only slightly longer than that of the A-1(a). The striker body is longer, the diameter of the pressure plate is larger, and the arming vanes are longer. The safety device is somewhat similar to the fork used for the A-3(a).
Functioning
Operation is the same as the A-1(a).
On release, the safety fork is removed, the vanes rotate and the pressure plate moves upward and away from the fuze (due to the left-hand threads). The vanes do not move vertically because the vane hub to which they are attached, turns also----being held by the bearing pins. The pressure plate is stopped by screws when it reaches the limit of its keyway. Impact pushes the pressure plate inward. The striker body is forced downward, the shear wire is sheared, and the striker point hits the primer.
Hazardous Components
The A-1(c) is used with a standard gaine in Japanese Navy designated Nos. 50 and 80 Land and Ordinary bombs.
Physical Data
Length, overall - 7.6 in, 193 mm
Width, overall - 2.3 in, 58.4 mm
See Also
Nose, A-3(a), Type 97 Mk 2 Model 2
Source(s)
OP 1667, Japanese Explosive Ordnance, Volume 1 (1946)
OPNAV 30-3M, Handbook of Japanese Explosive Ordnance (1945)
USNBD - Japanese Bombs & Fuzes (1944)
TM-E9-1984, Enemy Bombs and Fuzes, Section VII, Japanese Fuzes (1942)
