Term
| During flight, if cyclic control pressure is applied which results in a maximum increase in pitch angle of the rotor blade at position A, the rotor disc will tilt. |
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Definition
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Term
| The lift differential that exists between the advancing main rotor blade and the retreating main rotor blade is known as |
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Definition
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Term
| During forward cruising flight at constant airspeed and altitude, the individual rotor blades, when compared to each other, are operating |
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Definition
| at unequal airspeed, unequal angles of attack, and equal lift moment |
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Term
| When a blade flaps up, the CG moves closer to its axis of rotation giving that blade a tendency to |
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Definition
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Term
| During a hover, a helicopter tends to drift to the right. To compensate for this, some helicopters have the |
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Definition
| rotor mast rigged to the left side |
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Term
| Which is a result of the phenomenon of ground effect? |
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Definition
| The angle of attack generating lift is increased |
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Term
| Translational lift is the result of |
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Definition
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Term
| The primary purpose of the tail rotor system is to |
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Definition
| counteract the torque effect of the main rotor |
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Term
| If RPM is low and manifold pressure is high, what initial corrective action should be taken? |
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Definition
| Lower the collective pitch |
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Term
| WHAT IS AN apparent deflection of moving objects when they are viewed from a rotating frame of reference? |
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Definition
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Term
| The purpose of the lead-lag (drag) hinge in a three-bladed, fully articulated helicopter rotor system is to compensate for |
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Definition
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Term
| What is the rotor blade rotating away from the direction of flight stalls? |
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Definition
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Term
| what is an uneven amount of lift on opposite sides of the rotor disc? |
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Definition
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Term
| Rotary-wing aircraft to move so quickly that the retreating blade no longer moves fast enough relative to the air to provide lift is called? |
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Definition
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Term
| What is the minimum speed at which the airfoil must move through the air to generate lift called? |
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Definition
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Term
| The air flowing past the top of the wing of an airplane, or the rotor blades of a helicopter, is moving much faster than the air flowing past the under-side of the wing or rotor blade. The air pressure on the top of the wing or rotor blade is much lower than the air pressure on the under-side, and this explains the origin of the lift force generated by a wing or rotor blade to keep the airplane or helicopter in the air. What principle is this? |
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Definition
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Term
| When a fixed-wing aircraft drops below its stall speed, the entire aircraft loses lift and enters a condition called? |
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Definition
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Term
| what are some causes of a retreating ?blade stall |
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Definition
-High gross weight
-High airspeed
-Low rotor RPM
-High density altitude
-Steep or abrupt turns
-Turbulent ambient air |
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Term
| What is A standard rate turn for (light) airplanes? |
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Definition
| 3° per second turn, which completes a 360° turn in 2 minutes |
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Term
| The maximum forward speed of a helicopter is limited by |
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Definition
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Term
| When operating at high forward airspeeds, retreating blade stalls are more likely to occur under which condition? |
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Definition
| Steep turns in turbulent air |
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Term
| While in level cruising flight in a helicopter, a pilot experiences low-frequency vibrations (100 to 400 cycles per minute). These vibrations are normally associated with the |
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Definition
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Term
| Select the helicopter component that, if defective, would cause medium-frequency vibrations. |
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Definition
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Term
| The principal reason the shaded area of a Height vs. Velocity Chart should be avoided is |
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Definition
| insufficient airspeed would be available to ensure a safe landing in case of an engine failure |
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Term
| What control makes the helicopter increase or decrease in altitude? |
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Definition
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Term
| What controls the power produced by the engine? |
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Definition
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Term
| The result is to tilt the rotor disk in a particular direction, resulting in the helicopter moving in that direction. If the pilot pushes the _________ forward, the rotor disk tilts forward, and the rotor produces a thrust in the forward direction. If the pilot pushes the ________ to the right, the rotor disk tilts to the right and produces thrust in that direction, causing the helicopter to hover sideways or to roll into a right turn during forward flight. Fill in the blanks with one word? |
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Definition
| cyclic( control forward and back, right and left movement) |
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Term
| What is used to control nose direction or heading? |
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Definition
| pedals(to maintain balanced flight) |
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Term
1. Cyclic (lateral)
2. Cyclic (longitudinal)
3. Collective
4. Pedals
DEFINE ALL? |
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Definition
Used in forward flight-
1.To turn the aircraft
2.Control attitude
3.To adjust power through rotor blade pitch setting
4.Adjust sideslip angle
Used in hover flight-
1.To move sideways
2. To move forwards/backwards
3.To adjust skid height/vertical speed
4. Control yaw(motion about its vertical axis) rate/heading |
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Term
| During surface taxiing, the collective pitch is used to control |
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Definition
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Term
| During surface taxiing, the cyclic pitch stick is used to control |
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Definition
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Term
| With calm wind conditions, which flight operation would require the most power? |
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Definition
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Term
| Which flight technique is recommended for use during hot weather? |
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Definition
| During takeoff, accelerate slowly into forward flight |
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Term
| Which action would be appropriate for confined area operations? |
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Definition
| Plan the flightpath over areas suitable for a forced landing |
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Term
| If possible, when departing a confined area, what type of takeoff is preferred? |
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Definition
| A normal takeoff from a hover |
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Term
| If the pilot experiences ground resonance, and the rotor RPM is not sufficient for flight...? |
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Definition
| apply the rotor brake and stop the rotor as soon as possible |
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