INDEX
- Absence of latitude error in Anschütz (1912) compass, 158
- Absence of latitude error in Brown compass, 66
- Action of excentric pin in Sperry compass, 55 et seq.
- Air-blast pressure, Brown compass, 61
- Anschütz (1910) compass—
- Air-blast damping system, 42 et seq.
- Damping curve, 50
- Latitude error, cause of, 65
- — — correction for, 67
- — — value of, 68
- Magnitude of directive force at equator, 23
- Non-gyroscopic details, 138
- Period of vibration of axle, 33, 37
- Peripheral speed of wheel, 47
- Quadrantal error, 96, 107, 120
- Weight, diameter, and speed of wheel, 23
- Weight of sensitive element, 30
- Wheel tested to destruction, 140
- Anschütz (1912) compass—
- Absence of latitude error, 158
- Directive force, value of, 125
- Fourth gyro type, 128
- Gyro-wheels, details of, 159
- Non-gyroscopic details, 154
- Oil damping system, 156
- Quadrantal error, 107, 120, 126
- Repeater compasses, 162
- Temperature rise, 160
- Weight, diameter, and speed of wheels, 123
- Ballistic deflection and error, 81 et seq.
- Ballistic deflection, dead-beat, 87
- Ballistic deflection, tests by British Admiralty, 89
- Ballistic gyro, Sperry compass, 111
- Brown compass—
- Absence of latitude error, 66
- Air-blast pressure, 61
- Compensator weights, 134
- Damping bottles, 61
- — system, 59 et seq.
- Generation of directive force, 116
- Magnitude of directive force at equator, 23
- Non-gyroscopic details, 148
- Oil control bottles, 113
- On due west course, 117
- Quadrantal error, 113, 126
- Repeater compasses, 154, 162
- Weight, diameter, and speed of wheel, 23
- Weight of sensitive element, 30
- Centrifugal forces during quadrantal rolling, 130 et seq.
- Clock, gyroscopic, 16
- Compensator weights, 134
- Correction mechanism for latitude and north steaming errors, 75
- Course correction or cosine ring, 77
- Damped and free motion of gyro-axle, 49
- Damped and undamped vibrations, 35 et seq.
- Damping curve, 50
- — systems, 42, 43, 52, 59, 156
- — vibrations of gyro-compass, 29
- Dead-beat ballistic deflection, 87
- Details of gyro-wheels, 23, 159
- Directive force, value of, at equator, 23, 125
- Directive force, effective, 28
- Effect of rolling on due west course, 93, 98, 99
- Effect of rolling on due north course, 94
- Effect of rolling on north-west course, 101
- Elementary gyro-compass, 18
- — — at equator, 20, 26
- — — at 55 deg. N. lat., 24
- — — near North Pole, 26
- Elementary gyroscope at equator, 15
- Elementary gyroscopic phenomena, 4 et seq.
- Elimination of the quadrantal error, 107
- Excentric pin, action of, 55 et seq.
- — — stabilisation of, 110, 112
- External gimbal mounting, 13, 97
- Fourth gyro type of Anschütz compass, 128
- Free and damped motion of gyro-axle, 49
- Friction, solid and fluid, 39, 40
- Generation of directive force, 18, 116
- German submarines, 96, 120, 128
- Gimbal mounting, external, 13, 97
- Gyro-axle, free and damped motion of, 49
- Gyroscope at equator, 15
- — with three degrees of freedom, 4 et seq.
- Gyroscope and rotation of the earth, 15
- Gyroscopic compass at equator, 20, 26
- Gyroscopic compass at 55 deg. N. lat., 24
- Gyroscopic compass near North Pole, 26
- Gyroscopic phenomena, elementary, 4 et seq.
- Gyro-wheels, details of, 23, 159
- Latitude bail corrector, 69
- — corrector dial, 76
- — error, 65
- — — absence of, 66, 158
- — — cause of, 65, 66
- — — correction of, 67, 75
- — — value of, 68, 69, 75
- Magnetic compass, 1, 23, 30
- Magnitude of directive force at equator, 23, 125
- North steaming error, 70
- — — — correction mechanism, 75
- — — — value of, 74, 79
- Oil control bottles, 113
- — damping system, 156
- Pendulum, simple, 31, 81
- Period of rolling of a ship, 95
- — — vibration of gyro-axle, 33, 37, 88
- Peripheral speed of gyro-wheel, 47
- Phantom ring, 53
- Quadrantal error, 91, 96, 107, 120
- Quadrantal error, elimination of, 107, 108, 113, 120, 126
- Quadrantal error, value of, 107
- — rolling, centrifugal forces during, 130 et seq.
- Repeater compasses, 79, 80, 146, 152, 162
- Rolling of a ship, period of, 95
- — on due north course, 93, 98, 99
- — — — west course, 94
- — — north-west course, 101
- — quadrantal, centrifugal forces during, 130 et seq.
- Rotation of the earth and the gyroscope, 15
- Simple pendulum, 31, 81
- Sperry compass—
- Bail, 54
- Ballistic gyro, 111
- Compensator weights, 134
- Course corrector or cosine ring, 77
- Damping system, 52
- Directive force, magnitude at equator, 23
- Excentric pin, action of, 55 et seq.
- Excentric pin, stabilisation of, 110, 112
- Latitude bail corrector, 69
- — corrector dial, 76
- — error, cause of, 66
- — — correction of, 67, 75
- Latitude error, value of, 69
- Non-gyroscopic details, 142
- North steaming error, correction of, 75, et seq.
- On north-west course, 108
- Phantom ring, 53
- Quadrantal error, 108, 126
- Repeater compasses, 146
- Speed correction dial, 77
- Vacuum in wheel casing, 52
- Weight, diameter, and speed of wheel, 23
- Weight of sensitive element, 30
- Submarines, German, 96, 120, 128
- Temperature rise in Anschütz compass, 160
- Test of Anschütz wheel to destruction, 140
- Vacuum in Sperry casing, 52
- Vibration period of Anschütz compass, 33, 37
- Vibration period of gyro-axle, standard, 88
- Vibrations, damped and undamped, 35 et seq.
- Weight, diameter, and speed of gyro-wheel, 23, 123
- Weight of sensitive element, 30
Printed in Great Britain at
The Mayflower Press, Plymouth. William Brendon & Son, Ltd.