RMIT飞行训练课件－Compass 罗盘指南针

航空

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航空

Compasses Mass Brief
N S
S N
Pivot Line
Weight
Side View
Considerations
N S
N S
Pivot Line
Weight
N
S
• Acceleration errors
– Due to CoG displacement, acceleration errors
occur. As aircraft accelerates, pivot point
moves with the aircraft, but the magnet is left
behind causing errors, until it is realigned.
Side View Top View
Considerations
• In the southern hemisphere SAND
• South Accelerate, North Decelerate
West Apparent turn to the South Apparent turn to the North
South None None
East Apparent turn to the South Apparent turn to the North
North None None
HDG Acceleration Error Deceleration Error
000
180
270
090
N
S
Considerations
• Turning Errors
– The centripetal force of the turn pulls the pivot point of the
compass into the turn, but the magnet is left behind again
• In the southern hemisphere ONUS
• Overshoot through North, Undershoot through South
HDG 330
HDG 030
000
180
270
090
N
S
030
HDG 330
HDG 030
000
180
270
090
N
S
330
Considerations
• Turning through south
HDG 150
HDG 210
000
180
270
090
N
S
150
HDG 150
HDG 210
000
180
270
090
N
S
210