Mk 250 LK & BK Flair Container
 Over-All Length: 49 in.
Body Length: N/A
Body Diameter: 14.5 in.
Wall Thickness: 0.075 in.
Tail Length: 19.5 in.
Tail Width: 19 in.
Total Weight: N/A kg.
Filling:
  LK: 41 single candle parachute flares.
  BK: 25 modified red flairs and three SD 2 bombs.
Fuzing: Zt Z (89) B
SUSPENSION: Horizontal. The suspension lug threads into a suspension block welded to a suspension strut which itself is welded to the bottom of the lower half of the container. A rectangular plate is welded over the top suspension block and bears on the underside of the upper half when the container is closed.
COLOR AND MARKINGS: Both containers are khaki colored over-all, but the body markings differ.
Stenciled on Mk 250 LK:
Mk 250 LK
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41 Weiss
(89)BOF

Stenciled on Mk 250 BK:
Mk 250 BK
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3 SD 2

    A red bar 8 inches long and 1 inch wide is stencilid immediately above the nose weld.
CONSTRUCTION: The Mk 250 LK is constructed in two halves, which open along the longitudinal axis and whish is hinged at the tail.
    The nose and tail cone is secured inside the body by spot welds.
    On the lower half of the body, a strengthening rib is welded to the bottom longitudinally. Seven locating plates are welded inside the joining edges of the two halves to insure alignment.
    the fuze pocket is welded to the upper half of the container. The lower end of the fuze pocket is increased in wall thickness. Inserted into the lower part of the fuze pocket, and secured by a 5/32-in. steet shear pin, is the steel anvil. Around the base of the anvil is a collar upon which the base of the fuze pocket is seated. A steel tube, welded to the underside of the anvil, is internally threaded to receive the container locking bolt. A steel collar is inserted in the fuze pocket and rests on the tip of the anvil, and when assembled the fuze gaine locates inside this collar (see illustration).
    The container is held closed by the locking bolt. Locking bolt is held in the tube which is welded to the anvil. The anvil is held by the shear pin. when container is dropped, the fuze initiates the burster charge. The explosion forces the anvil down. The shear wire is broken. The locking bolt is then forced out and container opens.     Four tail fins are spot welded to the cone, the two on the upper half being slotted to facilitate loading on the bomb rack. An ordinary strengthening strut is riveted between the pairs of fins on each half of the tail cone.
    The Mk. 250 BK differs from the Mk 250 LK in that no cutaway portion exsists in the upper tail fins and that it contains a subsidiary container for three SD 2-kg HE bombs similar but of approximately half the length of that described under the Mk 500 Boden 6SD. This container is secured to the bottom half of the larger container by means of a double wire cable secured around the base of suspension strut. Large container operates the same as Mk 250 LK. The SD 2 container falls until it reaches the end of its cable. The resultant jerk causes locking wire to break and it then opens.
All information for this entry were acquired from Army Technical manual TM 9-1985-2/Air Force Technical Order TO 39B-1A-9
GERMAN EXPLOSIVE ORDNANCE (Bombs, Fuzes, Rockets, Land Mines, Grenades & Igniters)
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Updated 10-17-02