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ALLIED BOMBS AND FUZES |
| BRITISH FUZES |
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FUZE DATA |
FILE NO.: 2233.T05 |
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NATIONALY: BRITISH |
INFORMATION DATE: February 1944 |
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DESIGNATION |
PRINCIPAL MARKING |
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Pistol No. 17 |
CLASSIFICATION |
Pistol, Tail, Chemical Long Delay |
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Mk. I & II |
TYPE OF MISSILE |
G.P.H.E. Bombs |
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MARKINGS: |
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BOMBS USED IN: |
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250 lb. Mks I, II, III & IV G.P.H.E. |
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500 lb. Mks I, II, III & V G.P.H.E. |
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112 lb. Mk VII, R.L.H.E. |
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LEGEND |
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1 |
Vane cup |
13 |
Ampoule seating |
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2 |
Vane |
14 |
Adjustable distance piece |
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3 |
Striker |
15 |
Delay disc |
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4 |
Body |
16 |
Timing spring |
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5 |
Creep spring |
17 |
Firing pin release cup |
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6 |
Safety collar |
18 |
Locking balls |
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7 |
Safety spider |
19 |
Locking pellets |
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8 |
Hammer |
20 |
Locking strip screw |
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9 |
Crusher |
21 |
Locking strip with lead lug |
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10 |
Ampoule |
22 |
Body extension |
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11 |
Safety strip |
23 |
Firing spring |
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12 |
Gauze disk |
24 |
Firing pin |
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25 |
Becket |
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COLOR |
Brass. |
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OVERALL LENGTH |
12.5 inches (1.67 inches is visible). |
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OVERALL WIDTH |
1.0 inches. |
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MATERIAL OF CONSTRUCTION |
Brass. |
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DESCRIPTION & OPERATION |
The vane, vane cup, striker and safety pin arrangement are similar to the No. 22 Pistol, Mks I & II (see File No. 2211. T3). On impact, the striker (3) moves down, impinging on the ham-mer (8). The hammer breaks the glass ampoule (10). A gauze disc separates the distance piece (14) and the delay disc (15). Also, on impact, the safety spider (7) moves down, releasing the steel safety collar (6) which is now free to move up in di-rection of the vane. This upward movement allows upward mo-vement to two diametrically opposite. Safety strips (11), the lower ends of which normally bear against the firing pin release cup (17). Simultaneously on impact, the locking pellets (19) move down, compressing the firing spring (23) and causing the lead lug (21) to bear against the wall of the burster tube, thus locking the pistol in place. After the delay disc is softened, the firing pin release cup (17) moves up, under the action of timing spring (16), allowing balls (18) to move out, releasing the firing pin (24), which pierces the primer-detonator. |
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POSITION & METHOD OF FIXING IN BOMB |
Screwed into the burster tube of the bomb through the tail base plate. |
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COMPONENTS OF EXPLOSIVE TRAIN |
No explosive components in the Pistol. The detonator and boos-ter are held in a separate booster. |
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FUZES LIKELY TO BE FOUND WITH |
None. |
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ANTI-WITHDRAWAL |
If an attempt is made to unscrew the pistol, the lead lug (21) binds, and the pistol unscrews near the delay disc. This allows the firing pin release cup (17) so move up, the balls (18) move out, and the firing pin (24) is released. |
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DELAY TIMES |
1/2 hour to 36 hours. |
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REMARKS |
Do not attempt to withdraw this fuze. |
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