Fuses

Question 1

What are the types of fuses?

Answer 1

• point detonating (PD)
• base detonating (BD)
• proximity (VT)
• point initiating base detonating (PIBD)
• electrical time (ET)
• powder train time fuse (PTTF)
• mechanical time (MT)

Question 2

How can you ID point detonating fuses?

Answer 2

• simple looking fuse
• might have a selector switch or screw slot
• might have a plunger on the nose
• metal or plastic body
• nose fuse only

Question 3

What are the point detonating fuse safeties?

Answer 3

PD-HE, frag, move

Question 4

How can you ID base detonating fuses?

Answer 4

• screw in the back of fuse
• single piece body construction
• generally fuses are larger in diameter than a quarter
• base fuse only
• not used with mortars

Question 5

What are the base detonating fuse safeties?

Answer 5

BD-HE, frag, move

Question 6

How can you ID point initiating base detonating fuses (PIBD)?

Answer 6

• two types electrical (PIBD) and mechanical (spit back)
• used mainly with HEAT munitions
• crimped on nose cap is a key ID feature for PE/lucky
• not used with mortars

Question 7

What are point initiating base detonating (PIBD) fuse safeties?

Answer 7

piezoelectric fuse-HE, frag, move, EMR, static, PE/lucky

spit back fuse-HE, frag, move

Question 8

How can you ID powder train time fuses (PTTF)?

Answer 8

• body multi piece construction
• will have vent holes
• will have time marking increments on fuse body
• may have two brass rings towards base of fuse

Question 9

What are powder train time fuse (PTTF) safeties?

Answer 9

PTTF-HE, frag, move, 1hr WT (for pyrotechnic delay)

Question 10

How can you ID mechanical time (MT) fuses?

Answer 10

• multi piece construction
• time ring on base of fuse
• may have 2nd time ring above the one on base
• may have screwdriver slot on nose tip with a viewing window with time rings inside
• nose fuse only

Question 11

What are mechanical time (MT) fuse safeties?

Answer 11

MT-HE, frag, move, C/S

Question 12

How can you ID electrical time (ET) fuse?

Answer 12

• metal body multi-piece construction, newer models may look similar to VT fuses
• may have LED window on side
• may have bulls eye on top of fuse for means to set externally

Question 13

What are electrical time (ET) fuse safeties?

Answer 13

ET-HE, frag, move, EMR, static, C/S, 1hr WT

Question 14

How can you ID projected, fuse, proximity (VT) fuses?

Answer 14

• plastic->metal->ordnance
• metal to plastic junction
• multi-piece construction
• may have time settings on base of fuse
• 1hr WT is for the capacitors to bleed down to a no fire level