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Rotary-Wing Aerodynamics

Rotary-Wing Aerodynamics. CW3 Creel. OBJECTIVE. Develop the student instructor pilot’s understanding of the basic and advanced theory of rotary-wing aerodynamics. References. FM 1-203 Student Handout (Applied Aerodynamics, April 1993) Helicopter Aerodynamics, R.W. Prouty. Relative Wind.

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Rotary-Wing Aerodynamics

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  1. Rotary-Wing Aerodynamics CW3 Creel

  2. OBJECTIVE Develop the student instructor pilot’s understanding of the basic and advanced theory of rotary-wing aerodynamics

  3. References • FM 1-203 • Student Handout (Applied Aerodynamics, April 1993) • Helicopter Aerodynamics, R.W. Prouty

  4. Relative Wind

  5. Angle of Incidence

  6. Induced Flow

  7. Resultant Relative Wind

  8. Angle of Attack

  9. THE SCIENTIFIC APPROACH t(t+2)4h((-w-5)4m(v-2)2mn(tm+8))2 w3t(2-3)nc4(w-5t)3rb-7((m3bt)en-4t)ci3) i (2-3)nc4(w-5t)3rb-7 (4m(v-2)2mn) 4h((-w-5) (w-5t) t(t+2)4h((-w-5) 2mn(2-3)nc4 (w-5t)3rb-7((m3bt)en-4t)ci3)i (2-3)nc (4w-5t)3rb-7 (4m(v-2)2mn) (4w-5t)3rb-7 (4m(v-2)4h((-w-5) (w-5t) t(t+2)4h((-w-5) 2mn(2-3)nc4 (w-5t) t(t+2)4h((-w-5)2mn(2-3)nc4 4m(v-2)2mn) (4w-5t)3rb-7 (4m(v-2)4h((-w-5) (w-5t) t(t+2)4h((-w-5) 2mn(2-3)nc4 (w-5t) t(t+2)4h((-w-5)2mn(2-3)nc4 (w-5t) t(t+2)4h((-w-5)2mn(2-3)nc4 4m(v-2)2mn) (4w-5t)3rb-7 (4m(v-2)4h((-w-5) (w-5t) t(t+2)4h((-w-5) 2mn(2-t). e=mc2

  10. LIFTL=CL 1/2P S V2 • L = Lift Force • CL= Coefficient of Lift • P = Air Density (slugs of air per cubic foot) • S = Total wing area (in square feet) • V = Airspeed (in feet per second)

  11. DRAG • INDUCED • PROFILE • PARASITIC • TOTAL DRAG

  12. Total Drag

  13. Minimum rate of descent autorotation. Maximum endurance airspeed. Maximum rate of climb airspeed. Best maneuvering airspeed (most cases) Max glide distance in autorotation Max range DRAG AND AIRSPEEDS

  14. NEXT SHOW

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