Directed 30mm, RCL, FFR Flashcards
Boxer 30mm natures
CART 30mm x 173mm Armour Piercing Fin
Stabilised Discarding Sabot with Tracer (APFSDS T) DM33
CART 30mm x 173mm Kinetic Energy Time Fuzed (KETF) DM21
CART 30mm HEI-T
CART 30mm TPFDS-T
CART 30mm x 173mm Target Practice with Tracer (TP T) DM58
Cartridge 30mm x 173 MK239
Training Practice Tracer (TP T)
How many secondary projectiles in the KEFT?
162 tungsten secondary projectiles (203gm)
CARTRIDGE 30MM X 173, TARGET PRACTICE WITH TRACER, Cart 30mm x 173 APFSDS-T DM33 exposure limit
Daily exposure limit of 1000 rounds per day for personnel near the weapon.
Warhead FZ 71 Explosive fill
Comp B (RDX/TNT 60/40)
NEQ 1.05 kg (nominal)
Tetryl 9g
Rocket motor 2.75 Inch FZ90 MOD.2/S
Main components
Rocket Motor Tube (aluminium)
RF Igniter Assembly (HERO/ESD safe)
Propellant Grain (3.51 kg of SD1171 double base cylindrical rod with 8 point star centre hole + external inhibitor)
Nozzle and fin Assembly (coated steel, 3 fins, shorting clip, inner/outer seal, detent cut which locks rkt in pod)
Rocket Motor 2.75 Inch FZ90 Indirect Firing Range
9.18km (indirect firing)
WARHEAD, 2.75 INCH, HE FZ 71
Fuze Mk 352 Mod FZ 5
Funtioning
Two Devices lock the rotor in the unarmed position
During initial thrust set back weights in S&A move
rearwards against its spring tension (1 st lock)
Spring loaded second lock rotates on its axis
Lock has an index that locks the rotor out of
alignment
Centrifugal force is used to move the second lock by rotating it and freeing the rotor
Unbalanced rotor is now free to turn under the control of the escapement mechanism
When rotor has moved into the armed position it is lock by the use of an index and the second lock
If set back force or centrifugal force is insufficient to arm the fuze it will move back to the unarmed position and be locked into the unarmed position.
Mk 352 Mod FZ 5 PD Fuze with Booster purpose and components
Mk 352 Mod FZ 5 PD Fuze with Booster
Ensures safety in handling and storage and provides a safe separation distance from the aircraft on firing.
Components
Fuze body
Safe and arming device
Nose cap assy
Booster assembly
HEGP arming time
0.7-0.9 secs when subject to both 55g acceleration and 14 Hz spin at same time
HEAT 551 Warhead Fill
HE filling Octol (HMX/TNT 70/30) 460g
Booster Tetryl 7.39g
551 How many piezo electric crystals in Fuze?
5
HEAT 551 Describing arming of 551
Holding the detonator and the connecting circuit out of alignment
The rotor is held 270 out of alignment by two mechanical safety devices (Safety sleeves)
On firing the sleeves move rearward releasing the rotor which then moves into alignment under spring tension
HEAT 551 What do the fins achieve on the 551
Reducing the spin rate to approx 450 rpm
Ricochet Distance HEAT 551
350m normal target Hard Target 700m
Operating Limits Blast Overpressure HEAT 551
Blast Overpressure: Number of firings per firer per day (peace time):
Standing seven
Kneeling/Sitting one
Prone zero in peacetime
Arming sequence Cart 30mm x 173mm KEFT DM21
Once fired, the projectile accelerates along the barrel and as it passes the — — — — and — — (MVPB) at the muzzle, its — is measured. The MVPB subsequently corrects the — setting time for each individual — based on — information, via an — — method. After leaving the barrel, the — of the projectile will mechanically swing the — with the — safety device in line with the explosive train to mechanically —the —. Mechanical arming occurs at a distance of approximately — from the barrel.
During initial set-back the — — uses the principles of — induction to charge a capacitor. The induced — — is used to program the fuze, arm it — and to activate the — - —function. Electronic arming of the fuze occurs — after launching of the projectile.
When the programmed fuze setting — is reached, a —from the E— T— M— (ETM) starts the — process. The electric i—r initiates the explosive train and the — is —. A lethal — of spin-stabilised — — —- is formed, which significantly increases — —, especially at — ranges.
Once fired, the projectile accelerates along the barrel and as it passes the Rheinmetall Muzzle Velocity Measuring and Programming Base (MVPB) at the muzzle, its velocity is measured. The MVPB subsequently corrects the fuze setting time for each individual round based on target information, via an electromagnetic induction method. After leaving the barrel, the rotation of the projectile will mechanically swing the rotor with the detonator safety device in line with the explosive train to mechanically arm the fuze. Mechanical arming occurs at a distance of approximately 70m from the barrel.
During initial set-back the surge generator uses the principles of electromagnetic induction to charge a capacitor. The induced surge energy is used to program the fuze, arm it electronically and to activate the self-destruct function. Electronic arming of the fuze occurs 64ms after launching of the projectile.
When the programmed fuze setting time is reached, a signal from the Electronic Timer Module (ETM) starts the expulsion process. The electric igniter initiates the explosive train and the payload is ejected. A lethal cone of spin-stabilised tungsten sub-projectiles is formed, which significantly increases hit probability, especially at extended ranges.
HE 441B Warhead fill
The steel body encloses two neoprene rubber inserts that contain a total of 800 steel balls (approximately).
The inserts surround the main HE filling of 345g RDX/TNT.
84mm High Explosive Dual Purpose
(HEDP) 502 main components
HEDP 502 Projectile Assembly Shaped charge
590g Octol
Cartridge Case A ssembly 340g NK 1287
propellant
469B fill and burster
Smoke Composition( 800gm titanium tetrachloride(TiC1 4 absorbed by pulverous synthetic calcium silicate)
Burster Charge(12gm RDX/TNT)
441B arming distance
20m - 70m
441B range
150-1000m
66mm fill (main and booster)
Main Octol 315g
Booster Comp A5 5.6g
66mm initiation
piezo electric crystals crushed send current to fuze
66mm engagement distances
minimum operations
minimum training
Effective Range
Stationary Targets
Full Range
Minimum operations 25m
Minimum trg 100m
Effective 220m
Stationary Tgts 350m (with decreased 1st rnd strike probability)
Full Range 1400m
66mm description
The — and — assembly are attached (not designed for —) to a — — and are pre-loaded within a d—, f—/a—, t—, t— s—, l—. The launcher may be — several times with a sub calibre firing system, but is not intended to be — with the M72A6 rocket.
The warhead and fuze assembly are attached (not designed for disassembly) to a rocket motor and are pre-loaded within a disposable, fibreglass/alloy, telescoping, tube shaped, launcher. The launcher may be reused several times with a sub calibre firing system, but is not intended to be reloaded with the M72A6 rocket.
ASM 509 fill
Warhead 2kg PAX-47 (HMX 40% Al 40% binders/plasticisers20%)
Booster 9g PBXN-5
FILLS (main/booster)
66mm
HE 441B
HEAT 551
HEDP 502
HEGP FZ 71
ASM 509
ILLUME 545
SMK 469B
66mm
Main Octol 315g
Booster Comp A5 5.6g
441B
two neoprene rubber inserts with approx. 800 steel balls
Main RDX/TNT 345g.
Booster PBXN-5 2.7g
551
Main Octol (HMX/TNT 70/30) 460g
Booster Tetryl 7.39g
502
590g Octol
FZ 71
Main Comp B (RDX/TNT 60/40) 1.05 kg (nominal)
Booster 9g tetryl
ASM 509
Main PAX-47 (HMX 40% Al 40% binders/plasticisers 20%) 2kg
Booster PBXN-5 9g
545/545C
Mg/NaNO3 570g
469B
Main (Smoke) TiCl4/hydrous calcium silicate 800g
Burster RDX/TNT/wax 12g
ASM 509 detonator held ____ out of alignment by the SAI
90°
HEAT 551 targets
Armoured fighting vehicles (inc. skirting plates and grids), also concrete bunkers or landing craft and fragmentation of body for personnel
66mm arming distance/time, MV, ToF 250m, dispersion 250m.
12m/.67 secs, 200m/s, 1.4 secs, 1.5 mils
66mm PIBD modes, armour pen
Impact, Graze (30°), 150mm
66mm function/malfunction
PIBD on impact crushes piezoelectric crystals and initiates creating EFP and jet/damaged tube launcher shoots fwd w/ RKT, user receives flash burns.
66mm fuze name and function
M412A1 Set back unlocks leaves from spring loaded traverse mounted, drum shaped, spring powered rotor (shutter) which turns clockwise aligning electric detonator. Piezoelectric crystals crushed by impact send current initiates detonator. If graze wieghted graze lever moves which frees the cocked firing pin into the graze detonator.
551 RKT motor delay function
RKT motor delay burns for 45ms, as proj leaves barrel. Delay ignites intermediate, intermediate ignites ignition charge, initiating RKT motor charge, which burns for 1.5 seconds at 8.5 MPa and increases velocity of proj. To ensure effective ignition of rocket motor charge, delay unit expelled from nozzle when rkt motor pressure > 3MPa - (15m in front of wpn)., keeps travelling in line with proj at low velocity.
