标题: Steep Descending Turns Mass Brief [打印本页] 作者: 航空 时间: 2010-11-7 10:13:45 标题: Steep Descending Turns Mass Brief
作者: 航空 时间: 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 CosAoB 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作者: 猪也能飞 时间: 2013-10-28 19:10:11