Fuze Immunisation Flashcards
What does EL AZ represent?
Electric impact fuze
What character denotes the series?
The second number
What does Zus mean?
Addition
What fuze series may have a protective fuze fitted?
Series 7
What is meant by fuze immunisation?
The process by which a weapon is stopped from functioning - permanently
What are the 3 methods of fuze immunisation, what do they use and against what fuzes?
A - BD fluid - Electro Capacitor Resistance (ECR)
C - Salt Solution - Clockwork Fuzes
J - Gelly agent - Mechanical Fuzes
Method A is used against what fuzes?
ECR - electro-capacitor resistance
What liquid is used with method A and what is it’s make up?
BD liquid,
Benzole 9ltr / methylated spirit 4.5ltr / 23g salt / red dye
What does BD liquid do?
Destroys the electrical insulation before allowing a controlled discharge of the electrical current.
What liquid is used in method C and what does it do?
Salt solution
Approx 170-200g salt to 1/2ltr of lukewarm water
Solution corrodes and clogs up the cogs with the fuse used to desensitise picrate crystals
How does method C work?
A deposit of salt forms around the mechanism preventing functioning operation of the clockwork mechanism
What drill location depth and diameter is required for method C and J
Hard against the locating ring.
4mm diameter 12mm deep
What is method J?
To stop mechanical fuze.
A binary solution mix begins as a fluid and quickly turns into a solid.
What’s the soak time for method A, C an J?
25,45,45 mins
What are the 2 temporary inhibition methods?
Method E - Clock Stopper
F - Cryogenic Freezing
What are the contents for BD liquid?
2-1 mix
9l Benzole / 4.5l methylated spirit / 23g salt / red dye
What measurement is the vacuum pump tested to and for how long?
25Hg for 60sec
What length is the plastic hose and how much liquid will it hold?
Cut to 300mm long and will hold 10cc of fluid
What are the two positions on the two way valve?
Bomb to pump
Bomb to reservoir
What two sizes of drillbits are supplied?
2.5mm
4mm
What checks are carried out on the bicycle pump?
That it can achieve the pressure of 25 psi
What will method J do to the fuse?
When the binary gelling is mixed it will be a liquid form and will get into the mechanics of the fuse and will then set hard. Prevents movement
What is BD liquid pressurised to?
25psi
What is the salt solution pressurised to?
Until the luting leaks
What is method J pressurised to?
It’s not pressurised
What method of immunisation is used against ECR fuse?
Method A
