PL080 - Principles of Flight PPL(A)
PPl(A) base
PPl(A) base
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Eccentricity (decentration)of the propeller:
The engine gyroscopic moment disappears when the following ceases:
The yawing moment that is caused by the aerodynamic force acting on the vertical fin due to an asymmetric airflow behind the propeller is called:
At low airplane speed the highest propeller efficiency is achieved:
The type of spin is mainly influenced by the following factors:
Trim tabs settings; -center of gravity of the airplane; -location and size of the tailplane.
The highest glide ratio in a glide is achieved when the plane is flown (in a calm air) with the following speed:
Power load is called:
Symptom of an airplane in the transition phase is usually:
Interference drag is caused by:
Pulling the yoke causes:
During the stability analysis of plane it is necessary to take into account:
When you yaw the airplane, the powerplant giroscopic moment:
When you pitch the airplane, the powerplant giroskopic moment:
During the approach to landing on an airplane with a variable pitch:
When you perform an engine test before flight the advance ratio is:
When you roll the airplane, the powerplant giroscopic moment:
During steady level flight, the rotating propeller is trying to turn the plane in the direction opposite to the direction of rotation of the blade. That torque is called:
During maneuvers the pilot operates in a feedback loop to respond to the received signals. What are those main signals?
Location of center of pressure on a symmetrical profile, with an increasing angle of attack:
Propeller slip is:
Dynamic stall differes from the static stall, because during the dynamic one:
Stall is a state in which:
Increase of the aircraft pitching moment "Delta M" resulting from the yoke movement is Delta M = Delta L * lH, where:
When considering the stability of the airplane in an Cartesian (XYZ) coordinate system, we assume that all three axes pass through:
The aircraft flies horizontally at economic speed. To establish horizontal fly with minimal speed (Vs) we should to do:
An airplane during stall configuration is:
The plane in the spin phase is characterized by:
Aircrafts used in general aviation are usually constructed that:
The geometric Pitch of the propeller is
Actual pitch propeller:
The propeller efficiency is equal zero only when:
The state of balance, when the mass is usually existing and to which always returns after being displaced from a given equilibrium position is named:
Dynamic lateral stability mainly depends from:
Dynamic longitudinal stability mainly depends from:
Dynamic stability is:
Static directional stability depends from:
Static longitudinal stability mainly depends from:
Static lateral stability mainly depends from:
Static stability is:
