Cart 40mm grenades Flashcards
Cart 40mm grenades engages targets primarily at _____ but can engage out to ____
- 150 metres
- 350 metres
What can the 40mm be fired from?
- GLA
- M79
Explain the Hi-Lo propulsion system
- Firing pin strikes primer
- Primer flash ignites propellant in charge cup inside high pressure chamber
- Burning propellant creates high pressure chamber causing charge cup to rupture at vent holes
- Vent holes rupture gases flow into low pressure chamber
- Gases enter larger area of case, pressure reduces
- Low pressure propels projectile forward
Name 3 current in-service Cart 40mm grenades
- Cart 40mm HEDP M433
- Cart 40mm Illum Para White Star
- Cart 40mm Prac
What is the fill in the M433 HEDP and it’s muzzle velocity
- 45 grams of Comp A5 (RDX 98.5, stearic acid 1.5%)
- 76 m/s
Explain the functioning of the Cart 40mm HEDP M433
- Hi-Lo propulsion system utilised
- Driving band engages rifling imparting spin of 3750 rpm
- Expanding gases in low pressure chamber force projectile through launcher tube
- After leaving tube initial rotation causes fuze detent to free rotor
- Centrifugal force cause three hammer weights to move outward
- Allowing a conical spring to move firing pin forward, disengaging rotor
- Rotor moves to armed position
- Aligning detonator with firing pin and spit back shaped charge
- Fuze escarpment retards rotor movement, delaying arming until proj travelled 14 m
- On impact firing pin driven into detonator
- Triggering spit back shaped charge
- Producing a jet which detonates main charge
- Producing an armour piercing jet of molten metal & fragmentation of body
What type of fuze is on the Cart 40mm M433 HEDP
PIBD - Spit back
White star para contains:
93 grams of illum composition
What is the White star para’s candlepower ad burn time?
- 90,000
- 40 seconds
Explain the functioning of the Cart 40mm Illum White Star Para
- HI-LO Propulsion system initiated
- Propellant also ignites delay element in base of projectile
- Projectile is propelled to burst height
- Driving band imparts spin of 3750 rpm
- Delay element ignites ejection charge
- Functioning cont
- Ejection charge ignites candle & ejects candle through top of projectile body
- Parachute deploys to descend candle at 2 m/s
- Candle burns for approx 40 seconds
What is the fill in the Cart 40MM Prac DM118?
3 grams of red signal dye
What is the fill in the Cart 40MM CS RP707?
7 grams of CS smoke Composition
The Cart 40MM CS M674 can be used with the M203 grenade launcher. True or False?
False
Cart 40MM HEDP M430A1 can penetrate up to:
50mm of armour
What is the explosive filling in the Cart 40MM HEDP M430A1?
34.5 grams of Comp A5
What is the muzzle velocity and range of the Cart 40MM HEDP M430A1?
- 241 m/s
- 2200 metres
If an operator hears a “pop” when firing, what are they to do?
Check the bore to ensure a projectile is not lodged in the weapon barrel
