航空 发表于 2010-7-30 15:23:09

RMIT飞行训练课件－Stalling 失速2

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航空 发表于 2010-7-30 15:23:35

<P>Stalling Mass Brief<BR>Aim<BR>• To discover the aerodynamic principles and<BR>factors of a stall. Considering the approach<BR>to a stall, recognition of the symptoms, and<BR>how to recover with minimum height loss in<BR>varying configurations.<BR>Application<BR>– High AoA / Low IAS Operations<BR>– Take-off and landing<BR>– Inadvertent stall recovery<BR>Overview<BR>• Aim<BR>• Revision<BR>• Definitions<BR>• Principles<BR>– Stalling<BR>• Considerations<BR>• Air Exercise<BR>• Airmanship<BR>• Review<BR>Revision<BR>• Aerofoil and Lift<BR>Airspeed<BR>Lift <BR>Revision<BR>Drag<BR>Induced Drag<BR>Parasite drag<BR>TOTAL DRAG<BR>Slow Fast<BR>DRAG<BR>AIRSPEED<BR>Minimum Drag<BR>Best L/D Ratio<BR>Revision<BR>• Lift distribution<BR>Pressure distribution<BR>Centre of pressure<BR>Aerodynamic Force<BR>+<BR>_<BR>≡<BR>Definitions<BR>• Critical angle<BR>AoA<BR>CL<BR>16&ordm;<BR>Definitions<BR>• Stall<BR>– Occurs when the AoA exceeds the critical angle<BR>• Stall speed (VS)<BR>– In following configuration: MTOW @ MSL,<BR>Idle power, straight and level altitude, most<BR>forward CG position, clean configuration.<BR>Definitions<BR>• Streamline/Laminar<BR>Airflow<BR>• Turbulent Airflow<BR>• Separation Point<BR>• Boundary Layer<BR>• Transition Region<BR>• Stagnation Point<BR>Definitions<BR>• Load Factor<BR>Weight<BR>Load Factor  Lift<BR>cosAngle of Bank<BR>Load Factor  1<BR>Principles<BR>CL<BR>CL<BR>CL<BR>CL<BR>L<BR>L L L<BR>W W W W<BR>110kt<BR>4o<BR>70kt<BR>8o<BR>44kt<BR>16o<BR>&lt;44kt<BR>&gt;16o<BR>IAS<BR>AoA</P>
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<P><BR>Principles<BR>Usual Symptoms Close to stall<BR>1. High nose attitude<BR>2. Low IAS<BR>3. Reduced effectiveness of controls<BR>4. Stall Warning<BR>5. Control Buffet<BR>Symptom after stall<BR>1. Nose pitch down<BR>2. Loss of height</P>
<P>Considerations<BR>• Manoeuvres<BR>Actual Stalled Flightpath<BR>Attempted 3G<BR>Pullout<BR>Planned<BR>Flightpath<BR>Considerations<BR>• Manoeuvres V V LF New StallSpeed S  <BR>CosAoB<BR>LF  1<BR>Increased<BR>Stall Speed<BR>1G 2G 3G 4G<BR>2.0<BR>1.8<BR>1.6<BR>1.4<BR>1.2<BR>1.0<BR>“g” load<BR>A stall occurs at an AoA, not an IAS<BR>Considerations<BR>• Weight<BR>L<BR>L<BR>W<BR>W<BR>16o 16o<BR>40 kt 44 kt<BR>Considerations<BR>• Centre of Gravity<BR>Weight<BR>Lift<BR>Considerations<BR>• Ice<BR>Considerations<BR>• Flap<BR>Relative Airflow<BR>Stall with flap<BR>Lower Nose Attitude<BR>Stall without flap<BR>High Nose Attitude<BR>Considerations<BR>• Power<BR>Thrust<BR>TH<BR>TV<BR>Considerations<BR>• Stability in the stall</P>
<P>Air Exercise<BR>• Pre-Stalling Checks<BR>– Height sufficient to recover by 3000ft<BR>– Hatches/Harnesses secure<BR>– Engine Temperature &amp; Pressures<BR>– Location – not above a populated area<BR>– Loose articles secure<BR>– Lookout (360 degree turn)<BR>Air Exercise<BR>• Entry<BR>– Pick a reference point ( maintain with rudder)<BR>– Retard throttle, maintaining height<BR>– Note the symptoms<BR>• Stall<BR>• Recovery<BR>– Lower nose to horizon<BR>– Allow speed to increase through 65KIAS, full power<BR>– Climb out<BR>• Wing drop recovery<BR>– Apply opposite rudder to stop yaw and or bank<BR>– Lower nose to unstall<BR>– Passing 65KIAS, full power<BR>– Climb out<BR>Airmanship<BR>• Inadvertent stalls should never occur<BR>• Lookout<BR>• Smooth co-ordinated control input<BR>• Correct handover/takeover procedure<BR>• Monitor engine gauges<BR>Review<BR>• Critical angle<BR>• Separation point<BR>• Boundary layer<BR>• Load factor<BR>• Manoeuvres<BR>• Weight<BR>• CoG<BR>• Ice<BR>• Flap<BR>• Power</P>

cdzfk 发表于 2010-9-21 09:49:08

谢谢了，不错的东西

猪也能飞 发表于 2013-10-28 19:15:50

感谢楼主万分感谢感谢万分

xy8701 发表于 2015-4-7 22:46:39

谢谢楼主，我正准备去RMIT读书
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