RMIT滄俴捄褶諺璃ㄜSpinning Mass Brief

瑤諾楷桶衾 2010-10-15 03:54:22

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瑤諾楷桶衾 2010-10-15 03:54:42

Spinning Mass Brief Aim • To understand the aerodynamic principles and considerations of spinning (A condition of stalled flight) • Know how spins develop, and how to recover from a fully developed spin. Application • Used in aerobatics • Accidental stall with incorrect recovery technique Overview • Revision • Definitions • Principles 每 Spin • Considerations 每 Types of spins 每 C.G. 每 Autorotation 每 Types of spins 每 C.G. 每 Autorotation 每 Spin vs Spiral dive • Air Exercise • Airmanship • Review Revision CL CL CL CL L L L L W W W W 110kt 4o 70kt 8o 44kt 16o <44kt >16o IAS AoA Revision Usual Symptoms Close to the stall 1. High nose attitude 2. Low IAS 3. Reduced effectiveness of controls 4. Stall Warning 5. Control Buffet Symptoms of a stall 1. Loss of height 2. Nose Pitch Down Definitions • A spin 每 A condition of stalled flight where the aircraft loses height rapidly in a spiral descent. 每 Occurs due to a stall in which one wing stalls before the other (wing drop), and this wing drop is not corrected. Principles • Occurs at low airspeeds Considerations • Two types of spin: Flat spin 每 High nose attitude 每 Increased drag 每 Relatively low rate of rotation 每 Relatively low rate of descent Considerations Steep spin 每 Low nose attitude 每 Higher rate of rotation 每 Higher rate of descent Considerations • Centre of gravity 每 Forward C.G. causes a nose down tendency, giving a steeper spin 每 Rearward C.G. causes a nose pitch up tendency, giving a flatter spin, harder to recover Considerations • Autorotation 每 Occurs in the initial stages of the stall Two main features: 1. Auto roll The more deeply the dropping wing stalls, the more the aircraft wants to roll into the direction of the spin. 2. Auto yaw The dropping wing will generate more drag, yawing the aircraft into the spin. Considerations • Spin Vs. Spiral Dive Spin Spiral Dive 每 Low IAS (Stalled) 每 High and increasing IAS (Not Stalled) 每 High rate of rotation 每 Lower rate of rotation 每 Low noise level 每 High noise level 每 Possible buffet Air Exercise • Pre Entry 每 Lookout 每 Pick reference point 每 Manoeuvre checks: 每 H 每 H 每 E 每 L 每 L 每 L eight sufficient to recover by 3000ft AGL! atches/Harnesses secure ngine Temperature & Pressures ocation 每 not above a populated area oose articles secure ookout (360 degree turn) Air Exercise • Entry 每 Reduce power to idle, keep straight with rudder, maintain height with backpressure 每 When stall occurs, apply full rudder in desired direction and aft control column. • During 每 Count three rotations • Recovery 每 Apply full opposite rudder to stop rotation 每 Ease control column forward to unstall the wings 每 Level wings and ease out of dive 每 As nose passes horizon, climb away. Airmanship • Lookout • Pre-manoeuvre checks • Do not use aileron to pick up wing drop • Speed and manoeuvre limitations not to be exceeded • Smooth coordinated use of controls • Correct handover/ takeover procedure • UNINTENTIONAL STALL OR SPIN SHOULD NEVER OCCUR! Review • Spin 每 what is it, how do we get into one? • What are the two types of spin? 每 Flat Spin 每 Steep Spin • What are the differences between them • What happens to the spin if: 每 C.G. moves forward 每 C.G. moves rearward • What makes up autorotation? 每 Auto-roll 每 Auto-yaw • What is the difference between a spin and a spiral dive? • How do we recover from a spin?

紿珩夔滄 楷桶衾 2013-10-28 19:05:28

覜郅瞼翋勀煦覜郅覜郅勀煦

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瑤諾蹦抭_瑤諾楹祒_鏍瑤荎逄楹祒_滄俴楹祒's Archiver

RMIT滄俴捄褶諺璃ㄜSpinning Mass Brief