T.I. 250-lb., Spot Fire, No, 8 Mk I. IC, II, and III (Service)
No Image Available Filler and Weight
NA,
Body and Overall Weight
NA, 205 lb.
Color
Black overall; red filling band or yellow letters, white
Type of Round, DODIC
T.I., NA
Description:
Mk I Body—the bomb body, tail plate, and buster are the same as those used in the T.I. Bomb No. 1 Mk I. However, the buster container has a crossed slit on its inner end, filled with solder, to pass the flash from the buster charge to an igniter located in the impregnated hale. The ejector plate is held by screws against a steel ring welded to the inside edge of the nose. The ejector plate has a central flash hole covered by a thin copper disc, which has two crossed slits filled with solder. Three locating pins are welded to the ejector plate, and locate the bale igniter centrally over the flash hole. The filling bale consists of rolled cotton wool enclosed in cheesecloth, and held together by wire and steel bands. Six wooden battens ex¬tend from the ejector plate to the tail plate and serve to force off the tail plate when the bomb functions. The igniter at the nose end of the bale consists of an igniter base into which a tube filled with incendiary composition is screwed. A cen¬tral hole in the igniter base is located above the flash hole in the ejector plate, and has a similar closing disc of copper with a solder-filled cross slit. A diaphragm, soldered to the bomb body under the tail plate, holds the bale in place. Mark II Body—The Bomb Mk II differs from the Mark I only in general body construction, as the T.I. Bomb No. 1 Mk II differs from the No. 1 Mk I. Mk III Body—The Bomb Mk III is similar in body and tail plate construction to the T,I- Bomb No. T Mk lit. The internal arrangement of the filling is similar to that in the Bomb No. 8 Mk 1-Hcwever, as this bomb is arranged for tail fuzing, a length of instantaneous fuse leads from the tail fuze pocket, through a steel tube located along the inside of the bomb body, and into the forward end of the burster container. A burster capsule is attached to each end of the fuze. Mk IC Body The Mk IC bomb differs from the Mk III as the T.I. Bomb No. 1 Mk IC differs from the No. 1 Mk III.
Use:
Mk I Body—the bomb body, tail plate, and buster are the same as those used in the T.I. Bomb No. 1 Mk I. However, the buster con¬tainer has a crossed slit on its inner end, filled with solder, to pass the flash from the buster charge to an igniter located in the impregnated hale.
Functioning:
Mk I and IIIThe functioning of the fuze ignites the burster charge, which simultaneously ruptures the three soldered cross slits, to initiate the incendiary charge in the igniter, and forces the ejector plate toward the rear, causing the wooden battens to push off the tail plate and eject the bale. The incendiary charge in the igniter heats its tube until the impregnated cotton wool in the bale catches fire. Mk III and IC—The operation, when nose-fuzed, is the same as for the Mks I and II, and, when tail-fuzed, differs only in that the flash from the tail-fuze magazine is transmitted to the burster container by the instantaneous fuze, where the burster charge is ignited by the burster capsule.
Munition Components:
  • Fuze B60 Mk II, No, 848, or No- 806 Mk I
  • Fuze B60 Mk II, No, 848, or No- 806 Mk I
  • Fuze B60 Mk II, No, 848, or No- 806 Mk I
Data Source:
OP 1665 Explosive Ordnance British
Munitions Tech Data Sheet:
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