Intro

Question 1

Any instrument or device used in combat, fighting, or war to attack someone or defend yourself.

Answer 1

Weapon

Question 2

A combination of one or more weapons with all related equipment, materials, services, personnel, and means of delivery and deployment required for self-sufficiency.

Answer 2

Weapon System.

Question 3

2 categories of weapon system performance characteristics

Answer 3

Safety-Criticality

Mission Criticality

Question 4

Safety-Critically is defined in terms of:

Answer 4

Safety

Accuracy

Control

Question 5

“Weapons systems are designed to cuase destruction to their intended targets only. Critical failure of these sytems may cause injury or death to human beings.”

Answer 5

Safety-Criticality definition.

Question 6

“Failure of a weapon system to operate or ot damage its intended target may cause significant loss in terms of personnel, equipment, capital, and/or defence capabilities of a unit, military, or country.”

Answer 6

Mission-Criticality definition.

Question 7

Mission-Criticality is defined in terms of:

Answer 7

Reliability
Flexibility
Speed (of Operation)
Simplicity (of Operation)
Maintainability

Question 8

What is the primary goal of a weapon system?

Answer 8

Detect
Localize
Classify
Track
Engage

Question 9

What is the fire control solution?

Answer 9

Hit a moving target from a moving platform with a moving projectile through a moving medium.

Question 10

“The point in space from which all other positions are calculated”

Answer 10

Origin.

Question 11

What are the two types of reference frames?

Answer 11

Stable (inertial)

Unstable (non-inertial)

Question 12

“This type of frame is fixed and non-rotating with respect to distant stars - it never moves”

Answer 12

Stable (inertial) reference frame.

Question 13

“This type of frame is fixed to a particular object and moves in relation to that object’s orientation.”

Answer 13

Unstable (non-inertial) frame.

Question 14

“A displacement or difference in the aparent posittion of an object viewed along two different lines of sight and is measured by the angle or semi-angle of inclination between those two lines.”

Answer 14

Parallax

Question 15

“This point is located at the centre of the gravity of the ship. The point remains stable while the rest of the ship experiences angular motion around it.”

Answer 15

Master Datum Point.

Located in Fridge Flats.

Question 16

How is sytem alignement performed?

Answer 16

Fitting the weapon with a bore sight scope and pointing both the weapon and the sensor at a distant fixed target to calculate the offsets between the two to correct them.

Question 17

What are the two categories of ballistics?

Answer 17

Exterior Ballistics

Interior Ballistics

Question 18

Define Exterior Ballistics

Answer 18

“A number of natural phenomena that tend to cause a weapon in flight to change direction, velocity, or both.”

Question 19

Define Interior Ballistics

Answer 19

“The forces and motion of a projectile as it accelerates inside a gun”

Question 20

List 5 Exterior Ballistic forces

Answer 20

Question 21

Describe Skin Drag

Answer 21

Friction on the projectile’s outer surface.

Question 22

Describe Shape Drag.

Answer 22

Drag caused by low pressure zone created at the base of the projectile.

Question 23

Describe Wave Drag.

Answer 23

Compression waves form as atmosphere is compressed. The compression waves cause high drag.

Question 24

What are the two components of wind?

Answer 24

Range Wind

Cross Wind

Question 25

Define Range Wind

Answer 25

Component of wind acting parallel to the projectile’s line of fire.

Question 26

Define Cross Wind

Answer 26

Component of wind acting at 90 degrees to the projectile’s line of fire.

Question 27

Describe Aerodynamic Torque effect wrt to Drift

Answer 27

Spinning projectile’s attempt to align its axis of spin with the tangent to the projectile’s trajectory, deflecting downward.

Question 28

What are three factors that will increaase gyroscopic drift?

Answer 28

Longer projectile, faster spin, denser atmosphere

Question 29

Describe gyroscopic precession wrt to Drift

Answer 29

Gyroscopic precession causes the spinning object to move at right angles to the direction of an external force, deflecting slightly right.

Question 30

Describe the Coriolis Effect

Answer 30

The projectile does not rotate with earth, causing deflection.