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Practice 25-lb. Mks I and III (Obsolete) and Mks IV and V (Service) |
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Filler and Weight | ||
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| NA, | |||
| Body and Overall Weight | |||
| NA, 25 lb. (approx.) | |||
| Color | |||
| White over-all, with two ½ in. green bands ½ in. apart around after body | |||
| Type of Round, DODIC | |||
| Practice, NA |
| Description: |
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| This bomb consists of a solid, cast-iron nose section bored centrally to house a striker head, to which are attached a Long striker rod and striker. A striker guide bush is threaded into the after end of the central bore. A shear wire through the guide bush and the striker prevents the striker from contact with the detonator buster in the unarmed position. During transit and normal handling, the striker also is retained by a split pin and a spring-loaded safety pin. The split pin is removed when the bomb is loaded aboard the plane, and the safety pin is ejected when the bomb is released. |
| Use: |
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| Included in this section are five sizes of practice bombs. These are the only ones specifically designed for that purpose, although there are currently in use several practice bombs which arc merely service bombs inert-loaded with sane, water, or a chalk time solution. The standard practice bombs generally emit smoke as a spotting charge to indicate bombing accuracy. Standard practice bombs arc painted white over-all with two light green bands painted around the center of the tail. Inert-loaded service bombs used as practice arc painted black. Practice bombs containing an exploder have a red band painted around the rear portion of the body. |
| Functioning: |
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| The tail consists of a long tail cone, closed at the wider end by a central plug. A central tube for the detonator buster passes through the tail cone. Located in the central plug, slightly offcenter, is a filling plug through which the smoke or flash filling is inserted. As in most British practice bombs, the filling is contained in what is actually a part of the tail portion of the bomb. A tail tube is attached to the after end of the tail cone and supports a cylindrical shroud and four fins. The central plug is threaded externally and screws into the after end of the cast iron nose section of the bomb. |
| Munition Components: |
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| Data Source: |
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| OP 1665 Explosive Ordnance British |
| Munitions Tech Data Sheet: |
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