RMIT飞行训练课件－Steep Descending Turns 大坡度下降转弯

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RMIT Flight Training Steep Descending Turns
RMIT Instructor Rating Mass Briefs Issue 1 /2004 Page 1 Brief 13
STEEP DESCENDING TURNS
Aim: To understand the principles involved in descending an aircraft at a 45 AoB,
maintaining balance and airspeed.
Application:
- Height loss manoeuvre within a confined space
- Control coordination exercise
Revision:
 Forces in a Steep Turn
 Forces in a Glide Descent:
Principles:
- The vertical component of lift is reduced in both the descent and turn.
- The combination of both manoeuvres produces a highly tilted lift vector.
- Therefore, at the glide speed a high rate of turn and RoD will be achieved.
- Back pressure will be required to maintain speed.
W
L
D

L
W W
L
RMIT Flight Training Steep Descending Turns
RMIT Instructor Rating Mass Briefs Issue 1 /2004 Page 2 Brief 13
Considerations:
 Overbank / Underbank
- Banking tendencies will tend to balance each other out.
 Load Factor and Stall Speed
- Load factor and stall speed increases therefore fly faster (70kts) to
maintain a safe buffer over the stall.
Air Exercise:
 Pre-Entry
- Trim for glide attitude
- Select a reference point
- Lookout
 Entry
- Roll into steep descending turns, as you would into a steep turn (B B B)
except that, you lower the nose for 70kts and apply a little back pressure.
 During
- ALAP
- If done correctly, descend 500ft every 360
 Exit
- Same as steep turn resuming glide attitude.
Airmanship:
- Lookout
- Smooth but positive aircraft handling
- Correct Handover/Takeover procedure
A
B Outer Wing
Horizontal Distance Travelled
Loss of
Altitude
L Inner Wing L
Larger Angle
of Attack