Aerodynamics

Question 1

Bucket Speed

Answer 1

Best airspeed range for maneuvering, providing the largest power margin

Question 2

Transient Torque

Answer 2

Forward flight aerodynamic phenomena where left cyclic temporarily increases torque & right cyclic decrease torque

Question 3

Mushing

Answer 3

Temporary stall condition due to a sudden up flow condition in the main rotor

Question 4

Retreating Blade Stall

Answer 4

With increased airspeed, no lift areas of the retreating blade grow until the blade tip stalls due to excessive AOA demand

Question 5

Compressibility

Answer 5

B/C of the increased compressibility of air when at or near the speed of sound, on increase of drag & rearward shift of the center of pressure occur when high airspeed, high Nr, high gwt, high da, low temp

Question 6

No Lift Areas

Answer 6

-Reverse Flow
-Negative stall
-Negative lift
-Positive stall