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Weapons Systems - UWW > Torpedo Types > Flashcards

Torpedo Types Flashcards

1
Q

What are the two torpedo classifications?

A

Lightweight

Heavyweight

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2
Q

Lightweight Torpedos

A

Smaller torpedos designed to damage or rupture submarine hulls.

They do not require large charges because submarines are more vulnerable to underwater explosions.

Used by aircraft and as stand-off weapons by ships.

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3
Q

Heavyweight Torpedos

A

Large torpedos designed to damage surface and subsurface targets.

Primaryily used by submarines or motor torpedo boats.

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4
Q
A
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5
Q

Nose section: Whats in it? Why would it be flat vs rounded?

A

Contains the transducer and guidance unit.

In homing torpedos the nose is flat to maximuze size of transudcer array.

Straight running torpedos have more rounded nose for better hydrodynamic flow.

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6
Q

Nose Section: Transducer array

A

Uses sonar to detect a target.

Emissions are controlled by guidance unit.

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7
Q

Nose Section: Guidance Unit

A

Analyzes sonar signals to determine if a target is persent and tracks the target.

Controls the search pattern, range gates, and homing logic.

Sends course commands to the control unit.

May also send fusing information to the warhead.

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8
Q

Warhead Section

A

Contains the fusing, safe/arm devices, explosive train, explosive payload.

May be replaced with telemetry module for test/exercise torpedos.

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9
Q

Center Section

A

Contains the control group and power source/generator for the propulsor.

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10
Q

Centre Section: Control Group

A

Translates commands from the guidance section into positional commands for the torpedo control surfaces. Often contains the gyro due to its relation to the centre of gravity.

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11
Q

Centre Section: Power section

A

Contains fuel/battery.

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12
Q

Afterbody

A

Contains the motor, gearing, shaft, and propellers and exhaust system.

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13
Q

What are the 3 guidance types?

A

Straight Running
Wire Guidance
Homing

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14
Q

Straight Running Guidance

A

Travels on a set line of bearing.

Supercavitating torpedoes are generally straight runners.

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15
Q

Wire Guidance

A

Attached wire provides better sensor and fire control from the sub, and prevents weapon turnback.

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16
Q

Homing Guidance

A

Fire and forget.

17
Q

Wake Homing

A

Use sonar to detect the noise from the edge of the wake. Causes the torpedo to turn when it detects the outer edge of the wake.

Requires a long range.

18
Q

3 types of Propellants

A

Electric
Monopropellant
Chemical

19
Q

Propellants: Electric

A

Use silver oxide batteries because they do not need in-service maintenance. No exhaust sytem.

20
Q

Propellants: Monopropellant

A

Fuel with oxidizer. Used with internal combustion engines to provide mechanical force to drive the torpedo.

Exhaust system must be able to overcome depth pressure, limiting the depth.

Used by Mk 46 and Mk 48

21
Q

Propellants: Chemical

A

Chemical reaction actuates propulsor.

Eg. Sulfur hexaflouride gas sprayed over a block of lithium to provide heat. The heat generates steam which actuates a pump-jet.

Highly maneuverable.

22
Q

What are 4 engine types?

A

Turbine
Internal combustion engine
Electric
Rocket

23
Q

Engines: Turbine

A

Rotary mechanical device which extracts energy from a fluid flow and converts it to useful work.

24
Q

Engines: Internal Combustion

A

Use monopropellant.

25
Q

Engines: Electric motor

A

Electric goes brrrrrrrrrr

26
Q

Engines: Rocket

A

Only used with supercavitation because otherwise they would go too fast and damage the torpedo.

Typically have poor guidance because they cannot see through the boundary of their cavitation bubble.

27
Q

Two types of Propulsors

A

Propellers
Water Jets

28
Q

Propulsors: Propellers

A

Often use two conra-rotating blades to prevent axial rotation of the torpedo.

29
Q

Propulsors: Water Jet

A

Create a jet of water for propulsion.

May be a ducted propeller with anozzle or a centrifugal pump and nozzle.

30
Q

Launchers: Tubes

A
31
Q

Launchers: Rocket Booster

A

Launch to the target before it starts using fuel.

32
Q

Why do we use powdered aluminum in warheads?

A

It makes the explosive pulse last longer which increase the destructive power of underwater explosions.

33
Q

4 Types of Torpedo Fuses?

A

Contact
Proximity
Sonar
Magnetic

Weapons Systems - UWW (7 decks)

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