propeller

#1. As a result of gyroscopic precession, it can be said that:

• Aany pitching around the longitudinal axis results in a yawing moment
• Bany yawing around the normal axis results in a pitching momen
• Cany pitching around the lateral axis results in a rolling moment
• Dany rolling around the longitudinal axis results in a pitching moment

#2. A propeller rotating clockwise as seen from the rear, creates a spiralling slipstream that tends to rotate the aeroplane to the:

• Aright around the normal axis, and to the left around the longitudinal axis
• Bright around the normal axis, and to the right around the longitudinal axis
• Cleft around the normal axis, and to the left around the longitudinal axis
• Dleft around the normal axis, and to the right around the longitudinal axis

#3. The reason for variations in geometric pitch (twisting) along a propeller blade is that it:

• Aprevents the portion of the blade near the hub from stalling during cruising flight.
• Bpermits a relatively constant angle of attack along its length when in cruising flight
• Cpermits a relatively constant angle of incidence along its length when in cruising flight.
• Dminimises the gyroscopic effect.