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CLUSTER BOMBS

College of Air Warfare

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BASIC PRINCIPLE OF OPS - CLUSTER BOMBS.

BRIEFLY STUDY THE ARMT UNDER THESE CATEGORIES AVAILABLE IN THE IAF INVENTORY.

COMPARE THE BOMBS.

FILM - BL 755.

SCOPE

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NEED – REQUIREMENT

LL ATTACKS ESSENTIAL FOR CLOSE AIR SUPPORT ROLE – NO ALTERNATIVE

RETARDER BOMBS DELIVERY POSSIBLE FROM LL SUITABLE FOR LARGE AND STATIC TGTS WHERE

LARGE CONC OF HE INEFFECTIVE AGAINST SMALL TGTS

REQT – WPN TO GIVE HIGH KILL PROB AGAINST SMALL TARGETS

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PRINCIPLE OF OPS PRINCIPLE OF SHOT GUN - CATERS FOR AIMING ERRORS.

PARENT BOMB CONTAINS NUMBER OF SUB-MUNITIONS.

ON RELEASE FROM AC - PARENT BOMB IS RETARDED - EITHER RETARDING FINS OR PARACHUTE.

AFTER ENSURING THAT THE BOMB HAS BEEN SUFFICIENTLY RETARDED - THE SKIN / COVER OF THE PARENT BOMB IS EXTRACTED / PEELED OFF.

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PRINCIPLE OF OPS

AFTER ENSURING THAT THE SKIN IS PEELED OFF -

SUB-MUNITIONS ARE EXTRACTED.

EACH SUB-MUNITION AFTER EXTRACTION IS

SEPARATELY RETARDED.

EACH SUB-MUNITION FUNCTIONS INDEPENDENTLY

AFTER HITTING THE TARGET.

TYPE OF WARHEAD IN THE SUB-MUNITION -

ANTIPERSONNEL OR ANTI-TANK OR RUNWAY

PENETRATION.

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BL 755

DESIGNED TO CARRY 147 DUAL – PURPOSE / GP BOMBLETS.

DESIGN. A GAS OPERATED SYSTEM WHEN ACTIVATED

SPLIT THE OUTER CASING INTO TWO PARTS.

EJECTED THE BOMBLETS AT VARYING TIMES AND VELOCITIES.

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BL 755

DUAL PURPOSE CLUSTER BOMB M/S HUNTING ENGG TWO VERSIONS PROGRESSIVELY

DEVELOPED BL 755 No 1- GP CLUSTER BOMB BL 755 No 2- ADVANCED ANTI ARMOUR

(AAA)

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LEADING PARTICULARS

WEIGHT OF BOMB : 277 ± 5 KG

NUMBER OF BOMBLETS : 147

WEIGHT OF EACH BOMBLET : 1KG APPX.

FILLING OF BOMBLET : RDX/TNT

WEIGHT OF FILLING : 228 GMS

USED ON MIG 21, 23 AND JAGUAR AC

DAMAGE AREA :10000 SQM

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NOSE SECTION.• ARMING VANE• SAFETY ARMING & FUNCTIONING UNIT• BREECH & VALVE ASSEMBLY• LEAD ELECTRICAL FUZE ARMING

AIR ARMING VANE

SAFU INFLATABLE BAG

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AIR ARMING VANE CENTRE SECTION.

• GAS TUBE• GAS DISTRIBUTION BLOCKS• INFLATABLE BAGS• BOMBLETS

TAIL SECTION• FINS FOR RETARDING THE BOMB

SAFU INFLATABLE BAG

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SAFETY ARMING AND FUNCTIONING UNIT (SAFU)

LOCATED IN THE BOMB NOSE.

INITIATES FIRING SEQUENCE WHICH RELEASES THE BOMB SKIN AND EJECTS BOMBLETS.

FOUR TIME DELAY SETTINGS- .08, .8, .94, 1.13 sec.

CONDITIONS TO BE SATISFIED.

LIVE RELEASE HAS BEEN SELECTED BY PARENT AC.

AFTER SPECIFIED DELAY SETTING.

ARMING VANE ROTATES AT SPECIFIED RPM.

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SAFU - COMPONENTS

GAS MOTOR ASSY- SEALED X – RELEASES SAFETY DEVICE

CLUTCH AND DRUM ASSY – COUPLED TO ARMING VANE

STRIKER ASSY TIMER ASSY – DELAY FIRING OF PRIMARY

CARTRIDGE TRIGGER ASSY

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GAS SYSTEM

THROUGH TWO CARTRIDGES LOCATED IN BREECH AND VALVE ASSY

BREECH AND VALVE ASSY ROUTES GAS FLOW FROM PRIMARY

CARTRIDGE – UNLATCHING/LIFT OF SKIN ROUTES GAS FLOW FROM SECONDARY

CARTRIDGE TO EJECT BOMBLETS GAS DISTRIBUTION BLOCKS GAS TUBE – MOVES REARWARDS AND

CONVEYS GASES FROM SEC CARTRIDGE TO GAS DISTRIBUTION BLOCKS

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CENTRE SECTION

BOMBLETS 147 BOMBLETS ARRANGED IN 7 BAYS EACH BAY HAVING 7 SECTIONS EACH SECTION HAVING THREE BOMBLETS

EACH SECTION HAS ONE INFLATABLE BAG – 49 BAGS IN TOTAL

VEL OF GASES AND INFLATION RATE OF BAGS IS CONTROLLED 2,4,6 SECTIONS HAVE HIGH GAS FLOW – EJECTED FIRST 1,3,5,7 SECTIONS HAVE LOW GAS FLOW – EJECTED LATE

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1. AFTER RELEASE,

STABILISING FINS EXTEND

AND THE BOMB FOLLOWS A

NORMAL BALLISTIC

TRAJECTORY.

2. AFTER A SELECTED TIME

DELAY THE OUTER CASING

IS SPLIT INTO TWO BY GAS

PRESSURE FROM A

PRIMARY CARTRIDGE.

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3. ONCE THE

BODY CASE HAS

OPENED THE

MAIN GAS

CARTRIDGE IS

ACTIVATED AND

ITS PRESSURE

EJECTS THE

BOMBLETS.

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CLUSTER BOMBS

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CLUSTER BOMBLET

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FUNCTIONING OF BOMBLET

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BOMBLET EJECTION VELOCITY IS VARIED BETWEEN

BAYS TO ENSURE EVEN GROUND COVER.

EACH BOMBLET IS ARMED AFTER A SHORT PERIOD OF FLIGHT AND ON IMPACT THE SHAPED CHARGE PENETRATES THE ARMOUR – 25 CM PENETRATION.

IN ADDITION TO ITS ANTI-ARMOUR CAPABILITY EACH BOMBLET CASING DISINTEGRATES INTO 2000(1850 MT/S) FRAGMENTS WHICH ARE EFFECTIVE AGAINST NON-ARMOURED TARGETS AND PERSONNEL.

PIEZO ELECTRIC FUSE – FUSE ARMED ONLY WHEN TAIL IS DEPLOYED – FIVE ROTATIONS

OPERATION

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BME 330 CLUSTER BOMB

MANUFACTERED BY EXPAL COMPANY OF SPAIN. MIG-23,MIG-27 AND JAGUAR AIRCRAFT. RELEASE POSSIBLE AT 30 MTS

WEIGHT - 320kgs NUMBER OF BOMBLET - 180 WT. OF EACH BOMBLET - 0.800kgs BOMB EFFICIENCY 95% BOMBLET EFFICIENCY 80% 20 % BOMBLETS MAY/MAY NOT WORK

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NOSE CONTAINER IT CONSTITUTES THE FRONTAL END OF THE CYLINDRICAL SKIN AND HOUSES

THE TWIN FUZE SYSTEM AND ELECTRONIC UNIT THIS ELECTRONIC UNIT SUPPLIES ELECTRICAL POWER THROUGH FUZE TO DE-

SKINNING OF BODY AND TO THE PYROCARTRIDGE FOR SCATTERING OF BOMBLETS.

MAIN BODY MAIN BODY HOUSES THE CLUSTER FRAME WHERE BOMBLETS ARE STORED IN

NINE LAYERS EACH LAYER CONTAINS TWENTY BOMBLETS.IT ALSO CONTAINS THE DE-SKINNING SYSTEM AND THE SCATTERING SYSTEM FOR BOMBLETS DISPERSION.

TAIL UNIT STABILISES THE BOMB AFTER RELEASE.IT HOUSES A PARACHUTE ASSEMBLY

HELD TO THE BOMB WITH THE HELP OF HOLDING DEVICE.

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BOMBLETS

180 BOMBLETS. TWO TYPES - ANTI PERSONNEL AND ANTI ARMOUR. MIX - FACTORY SET AND CANNOT BE REARRANGED. SEPARATE PARACHUTE PROVIDED FOR EACH BOMBLET. THREE TYPES OF PARACHUTES USED HAVING VARYING

CANOPY AREA - SMALL , MEDIUM AND LARGE. FIRST THREE LAYERS HAVE SMALL PCHUTES LAST THREE LAYERS HAVE LARGE PCHUTES INDIVIDUAL FUZE.

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BL 755 Vs BME 330

DESCRIPTION BL 755 BME 330

NO OF

BOMBLETS

147 ARRANGED IN 7 BAY S EACH HOLDING 21 BOMBS

180 ARRANGED IN 9 LAY ERS WITH 20 BOMBS EACH

WT OF BOMBLET

1 K G 0.8 GMS

TY PE OF BOMBLETS

GP AP AND AA - RATIO FIXED IN FACTORY ITSELF

METHOD OF ACHIEVING

SPREAD

PRIMARILY BY VARY ING THE GAS PRESSURE TO EACH BAY

PRIMARILY BY THE VARY ING RETARDER PARACHUTE CANOPY AREA

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DESCRIPTION BL 755 BME 330

MAIN BOMB RETARDER SY STEM

RETARDER PARACHUTE NOT AVAILABLE. PRIMARILY BY GIVING MARGINAL FWD SWEEP TO THE TAIL FINS

RETARDER PARACHUTE AVAILABLE IN THE TAIL SECTION. GETS CONNECTED TO THE MAIN BODY ONLY AFTER RELEASE OF THE BOMB

OPERATING LOGIC

PROVIDED BY

SAFU ELECTRONIC UNIT WITH ITS OWN BATTERY

CARTRIDGES TWO MAIN CARTS + TWO PY ROPUSHERS

BL 755 Vs BME 330

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BELOUGABELOUGA

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BLG - 66 AFTER RELEASE THE BOMB IS RETARDED BY

PARACHUTE CENTRAL TUBE IS THEN WITHDRAWN BY THE

PARACHUTE THIS ACTUATES THE PYROTECHNIC CHARGES OF

EACH RING OF GRENADES GRENADES ARE RELEASED BY RINGS TO PROVIDE

CONSISTENT PATTERN GRENADES ARE ALSO INDIVIDUALLY RETARDED TWO RELEASE PATTERNS

LONG CARPET – 40 x 240 MTS SHORT CARPET – 40 x 120 MTS

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BL 755 Vs BELOUGA

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SECOND METHOD - BOMB HELD ON TO THE AC - SUB-MUNITIONS DISPENSED DIRECTLY FROM THE BOMB ITSELF. – EXAMPLE JP 233.

CLUSTER BOMBS

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JP 233

BRITISH CLUSTER BOMB - TWO TYPES OF SUB-MUNITIONS

VERY HEAVY WEAPON – 2335 KG ; 5 TIMES EFFECTIVE

HB 876 - AREA DENIAL MINES - 215 CAN BE CARRIED IN ONE MODULE

WT 2 .4 KG - BLAST FRAGMENTATION WARHEAD.

ON IMPACT WITH GROUND IT STANDS UP ON ITS VANES - RANDOM SELF DESTRUCTION FUZE.

BURST EITHER BY LOCAL DISTURBANCE OR DELAY FUSE

WARHEAD ON DETONATION CAN PERFORATE STEEL

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JP 233 SG 357 RUNWAY PENETRATION WEAPONS 30 WPNS CARRIED IN ONE MODULE BRAKING AFTER RELEASE BY P’CHUTE –

PROGRESSIVELY GET VERTICAL TWO WARHEADS

FIRST – SHAPED CHARGE WHICH PUNCHES A HOLE THRO WHICH SECONDARY CHARGE IS FIRED

SECONDARY CHARGE FIRES WELL BELOW SURFACE – CRATERING HEAVY

JP 233 HAS REUSABLE MODULE

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REVISION

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QUESTIONS?