Steep Descending Turns Mass Brief

航空发表于 2010-11-7 10:13:45

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航空发表于 2010-11-7 10:13:56

Steep Descending Turns Mass Brief Aim • To understand the principles and considerations involved in descending an aircraft at 45° AoB, maintaining balance and airspeed. Application • Control coordination exercise • Height loss manoeuvre within a confined space • Evasive manoeuvre Overview • Revision • Definitions • Principles – Forces • Considerations – Overbanking/underbanking – Load factor • Air Exercise • Airmanship • Review Revision • Forces in a Steep Turn 60° Revision • Forces in a glide θ  L W D Principles • The combination of both a turn and descent produces a highly tilted lift vector • This means the vertical component of lift will be very small • Resulting in a high ROD and high turn rate • Back pressure will be required to maintain speed Considerations • Overbanking tendency L R Considerations • Underbanking tendency Outer Wing Horizontal Distance Travelled Loss of Altitude Inner Wing L Larger Angle L of Attack Considerations Load Factor and Stall Speed • Load factor and stall speed increases therefore fly faster (80kts) to maintain a safe buffer over the stall. V V LF New StallSpeed S   CosAoB LF  1 Weight Load Factor  Lift Considerations • Limited bank angle (not in excess of 45° Angle of Bank) • Aim for a speed of 80 KIAS • Rate of Descent 1000 Ft/min 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 80 KIAS and apply firm back pressure. Air Exercise During • ALAP Exit • BBB Same as steep turn resuming glide attitude. Airmanship • Lookout • Smooth but positive aircraft handling • Correct Handover/Takeover procedure • Aircraft within operating limitations • Coordinated turns • Awareness of spiral dive symptoms and prompt recovery if necessary Review • Highly tilted Lift vector • Overbanking / underbanking tendancy • Load Factor

猪也能飞 发表于 2013-10-28 19:10:11

感谢楼主万分感谢感谢万分

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Steep Descending Turns Mass Brief