30mm SAPHEI Flashcards
1
Q
What does SAPHEI stand for?
A
Semi Armour Piercing High Explosive Incendiary
2
Q
What is the fuze fitted to the round?
A
FZ DB MR3005
3
Q
What are the major components of the FZ BD MR3005?
A
- Fuse base
- Fuse body
- Firing pin assembly
- Rotor assembly
- Priming relay
4
Q
What is the explosive fill contained within the Cart 30mm OSPEI F7671 (SAPHEI)1A/1W
A
HEXAL (RDX, Aluminium, Wax)
5
Q
The Cart 30mm OXAS F2271 (TP) is ballistically matched to the operational round. True/False?
A
True
6
Q
The Cart 30mm OSPEI F7671(SAPHEI) 1A/1W is designed for what?
A
Use against helicopters or other slow moving aircraft, non-armoured and light armoured vehicles
7
Q
The SAPHEI consists of?
A
- Electrically primed cart case
- Semi Armour Piercing High Explosive Incendiary
8
Q
Define the operation of the SAPHEI round
A
- Electric current ignites primer
- Primer ignites propellant charge
- Gas pressure builds up and projectile is forced down the barrel
- Spin is imparted as the rifling engages the driving band
- Setback drives firing pin rearwards and compresses firing pin spring
- Centrifugal force moves balls in ball holder and double spiral spring outwards
- Firing pin begins to creep forward
- On impact, inertia will drive firing pin forward
- Firing pin strikes detonator
- Functions priming delay and main fill
9
Q
How does the self destruct work?
A
- If projectile has not hit target after 6-16 seconds
- Decaying o centrifugal force allows balls to move inwards
- Firing pin will drive forward due to energy in spring