| 1. | Balancing lift across the rotor disc is important to a helicopter's stability.
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| 2. | Horizontal aluminum rotor disc is visible in center of meter ]]
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| 3. | More recently, large-rotor disc brakes are being used as drag brakes.
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| 4. | Recovery is complete when the rotor disc reaches the upwind part of the vortex.
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| 5. | Vaseline was used to lubricate the rotor disc contacts.
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| 6. | In a retreating-blade stall, however, only the retreating half of the helicopter's rotor disc experiences a stall.
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| 7. | In March, the FAA directed airlines to inspect such engines for possible cracks in turbine rotor discs.
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| 8. | During vertical autorotation, the rotor disc is divided into three regions the driven region, the driving region, and the stall region.
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| 9. | A main rotor blade was either observed to separate or was seen separated in the vicinity of the main rotor disc.
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| 10. | Collective pitch varies the magnitude of rotor thrust by increasing or decreasing thrust over the whole rotor disc at the same time.
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