4.5-in. Photoflash Bomb Mks I and II, and 4.5-in. Heavy Photoflash Bomb (Service]
No Image Available Filler and Weight
NA,
Body and Overall Weight
NA, 19 lb.
Color
Body black over-all; red band around nose end
Type of Round, DODIC
Photoflash Bomb, NA
Description:
The Photoflash Bombs Mk I and Mk II are similarly constructed, the only difference being that the Mk II has narrower tail fins. Each flash has a tubular body, closed at the tail by a closing dome and at the nose by a front diaphragm having a bush into which is screwed the nose fuze. The four tail fins are located at the after end. A quantity of flash composition is contained in the body between a front and rear diaphragm. The filling hole is closed by a press-cap and oversea], A central tube, closed at each end, extends between the front and rear diaphragms and is filled with gunpowder. A socket secured to the front diaphragm houses a perforated disc, and a muslin disc, which closes the nose end of the central tube. The perforated disc is held in position by a socket plug having a flash hole covered by a disc, which, in earlier issues, is made of brass, but in later issues is paper.
Use:
The Photoflash Bombs Mk I and Mk II are similarly constructed, the only difference being that the Mk II has narrower tail fins.
Functioning:
When the fused bomb is released from an aircraft, its fuze is set in operation and the flash falls until the magazine charge of the fuze explodes. The flash from the magazine charge passes through the perforated disc and ignites the gunpowder in the central tube. The gunpowder explodes, bursts the body of the photographic flash, and simultaneously ignites the flash composition.
Munition Components:
  • Fuze No. 28B, 848, or 849
  • Fuze No. 28B, 848, or 849
  • Fuze No. 28B, 848, or 849
Data Source:
OP 1665 Explosive Ordnance British
Munitions Tech Data Sheet:
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