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Flashcards

15. Asymmetric Flight

Ella Davies POF English 56 cards

Cards in this deck (56)

  1. 1what type of aircraft does asymmetric flight refer toMEP, where engine failures occur
  2. 2what does one engine failure in flight result inadverse affect in performance and controllability
  3. 3why can aircraft become uncontrollablesubsequent reduction in thrust and therefore inability to climb, paired with yawing moments resulting from low airspeed, due to the failed engine
  4. 4if the left engine fails, which direction will you yawto the left
  5. 5will a GTE or Propellor engine produce the biggest yawing momenta propellor engine
  6. 6why will a propellor driven aircraft produce the biggest yawing momentbecause the windmilling propellor will increase the drag on the side where the engine failed, increasing the yawing moment
  7. 7how can the yawing moment be balancedby the rudder force x the distance from the CofG
  8. 8what is the affect of a more aft CofGit makes the correcting moment needed much bigger
    F x D
  9. 9what factor will impact the rudder force required for the correcting momentthe speed
  10. 10at what speed will a bigger rudder deflection be needed for an appropriate correcting momentlower IAS
  11. 11what is the Vmcthe speed at which the full rudder deflection is no longer big enough to maintain directional control
  12. 12what does dropping to the Vmc causedeviation from the flight path
  13. 13what moment can also be created when an engine of a multi engine aircraft fails in flighta rolling moment
  14. 14in which direction will the rolling moment occurtowards the failed engine
  15. 15when the aircraft consists of engines that both rotate in the same direction, what existsa critical engine
  16. 16why is there a critical enginethe thrust line moves to the RHS on both engines, this means that the moment arms are different lengths and therefore a yawing moment will be created
  17. 17how is the rolling moment intensifiedbecause the wing with the engine that is still working correctly is travelling faster through the air and therefore producing more lift
  18. 18how does the shielding of the wing by the fuselage intensify the rolling momentthe fuselage is shielding the wing from the relative airflow, and therefore preventing it from producing lift in that area,
  19. 19what can shielding the fuselage lead tocreating a slide slip angle and therefore lead to fin stall
  20. 20in what way can banking increase the effectiveness of the rudderwhen banked in the direction of the operating engine it induces a slide slip and the rudder becomes more effective at any given speed, as it has an increased AoA
  21. 21What is the limit of the bankapprox 5˚
  22. 22why is the bank impacted to 5˚because after the 5˚ Adverse Aileron yaw is created and the load factor has changed too significantly
  23. 23how is the yawing moment intensifiedby the windmilling propellor
  24. 24what can you say about the distance of the thrust lines to the centre of gravity of the ac with jet enginesthe thrust lines are the same distance
  25. 25which engine will be the critical engine in a MEPthe engine with the distance from the thrust line to the CofG is the smallest
  26. 26in which direction does the ac rolltowards the failed engine
  27. 27why does the aircraft roll towards the failed enginebecause of loss of the slip stream behind the failed engine and the disturbance of airflow behind the windmilling propellor
  28. 28how is the roll intensifiedthe outer wing will start travelling faster due to inertia and therefore create more lift
  29. 29what can lead to fin stallbanking towards the live engine
  30. 30what happens when you bank towards the live engineit induces a slideslip angle and the rudder becomes more effective
  31. 31why does the rudder become more effectivebecause the rudder has an increased angle of attack
  32. 32what can you say about the Vx and Vxse in regard to a prop one enginethe Vxse is slightly faster than the Vx
  33. 33on which Vmc does the altitude not effectthe Vmcl
  34. 34define the critical enginethe engine that creates the most adverse yaw after failure
  35. 35what can be said about the torque on counter rotating propellorsthe torque counteracts much of the error/yawing effect
  36. 36what can you say about jet aircraft and critical enginejet aircrafts do not have critical engines
  37. 37what does an aircraft tend to do with a left crosswind on take offweathervane to the left
  38. 38what is the critical engine on take off with a left crosswindthe outer left engine
  39. 39when are bigger deflections requiredat low speeds
  40. 40what happens when weight is increased in regard to the climbing anglethe climbing angle increases
  41. 41what is the Vmc divided intoVmcg
    Vmca
    Vmcl
  42. 42Vmclminimum control speed during landing and approach
  43. 43Vmcgminimum control speed on the ground
  44. 44Vmcaminimum control speed in the air
  45. 45define Vmcgminimum calibrated airspeed, following the failure of the most critical engine, directional control can still be maintained using primary flight controls
  46. 46what is important to remember regards the Vmcgdoes not include nose wheel steering
  47. 47what are the conditions for Vmcg? (4)-max available TO power or thrust on live engine
    -in most critical configuration for TO
    -max TOW
    -no more than 30 ft deviation from runway centreline
  48. 48what is important to remember about the V1 in association to VmcgV1>/= Vmcg
  49. 49define Vmcaminimum calibrated airspeed, following failure of the most critical engine, directional control can still be maintained
  50. 50what conditions are necessary for Vmca (6)-angle of bank not greater than 5 degrees
    -max TO power or thrust on live engine
    -Landing gear up
    -Flaps in TO position
    -Max TOW
    -Prop Feathered (if applicable)
  51. 51what is important to note about the VR and VmcaVR>/= 1.05 Vmca
  52. 52what are the Vmcl conditions? ()-AoB not greater than 5˚
    -AC in most critical config for approach and landing
    - Max landing weight
    - Prop Feathered
    -Min roll rate 20 ˚ toward live engine in not more than 5 seconds
  53. 53what factors decrease Vmcg or VmcaHigh altitude
    high temperature
    low density
  54. 54why does altitude have no impact on the Vmclbc during the approach and landing the engine is in flight idle, hence not being affected by changes in density, altitude and temp
  55. 55what factors affect all Vmc s?Most unfavourable CofG
    Max rudder force required of 150 pounds
  56. 56—

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POF Flashcards on 15. Asymmetric Flight, created by Ella Davies on 29/04/2018.
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Ella Davies
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