Term
| WHY IS IT IMPORTANT THAT THE LEADING EDGE OF A WING AND THE UPPER SURFACE OF THE FORWARD HALF OF THE WING BE KEPT FREE OF DENTS AND ANY DIRT OR CONTAMINATION? |
|
Definition
| THE MAINTAIN MAXIUMUM AMOUNT OF LIFT. |
|
|
Term
| WHAT IS MEANT BY THE ANGLE OF ATTACK OF AN AIRPLANE WING? |
|
Definition
| THE ACUTE ANGLE FORMED BETWEEN THE CHORD LINE OF AN AIRFOIL AND THE DIRECTION OF THE AIR THAT STRIKES IT. |
|
|
Term
| WHAT ARE THE FOUR BASIC FORCES THAT ACT ON AN AIRCRAFT IN FLIGHT? |
|
Definition
| LIFT, DRAG, GRAVITY, AND THRUST. |
|
|
Term
| WHAT IS MEANT BY THE ANGLE OF INCIDENCE OF AN AIRPLANE WING? |
|
Definition
| THE ACUTE ANGLE FORMED BETWEEN THE CHORD LINE OF AN AIRFOIL AND THE LONGITUDINAL AXIS OF THE AIRCRAFT ON WHICH IT IS MOUNTED. |
|
|
Term
| WHAT CAUSES PARASITE DRAG ON AN AIRPLANE? |
|
Definition
| THE FRICTION OF THE AIR FLOWING OVER THE SURFACE. |
|
|
Term
| NAME THE THREE AXES OF AN AIRPLANE AND WHAT CONTROLS EACH ONE. |
|
Definition
- VERTICAL- RUDDER
- LONGITUDINAL- AILERON
- LATERAL- ELEVATOR
|
|
|
Term
| DOES THE LIFT THAT IS PRODUCED BY THE HORIZONTAL TAIL SURFACES OF AN AIRPLANE ACT UPWARD OR DOWNWARD IN NORMAL FLIGHT? |
|
Definition
|
|
Term
| WHAT IS THE FUNCTION OF LATERAL DIHEDRAL IN THE WINGS OF AN AIRPLANE? |
|
Definition
| GIVES THE AIRCRAFT ROLL/LONGITUDINAL STABILITY. |
|
|
Term
| WHAT IS THE PURPOSE OF A STALL STRIP ON AN AIRCRAFT WING? |
|
Definition
| THEY CAUSE THE ROOT OF THE WING TO STALL OUT AT A LOWER ANGLE OF ATTACK THAN THE PORTION OF THE WING AHEAD OF THE AILERONS. |
|
|
Term
| WHAT IS THE FUNCTION OF A SERVO TAB ON AN AIRCRAFT CONTROL SURFACE? |
|
Definition
| PRODUCES A AERODYNAMIC FORCE THAT AIDS THE PILOT IN MOVING THE SURFACE. |
|
|
Term
| WHY DO MOST HIGH PERFORMANCE AIRCRAFT USE SLOTTED FLAPS? |
|
Definition
| BECAUSE THEY CAN BE DEFLECTED TO A GREATED ANGLE, BEFORE THE AIRFLOW OVER THEIR SURFACE BREAKS AWAY. |
|
|
Term
| WHAT IS THE PURPOSE OF A MOVABLE SLAT IN THE LEADING EDGE OF SOME AIRPLANE WINGS? |
|
Definition
| FORMS A DUCT AT HIGH ANGLES OF ATTACK WHICH DELAYS THE STALL. |
|
|
Term
| WHAT CAUSES DISSYMMETRY OF LIFT PRODUCED BY THE ROTOR OF A HELICOPTER? |
|
Definition
| THE FORWARD SPEED OF THE HELICOPTER. THE BLADE THAT IS TRAVELING FORWARD PRODUCES MORE LIFT THAN THE BLADE THAT IS TRAVELING REARWARD. |
|
|
Term
| WHY DO SINGLE ROTOR HELICOPTERS USE AN AUXILIARY ROTOR ON THEIR TAIL? |
|
Definition
| TO COUNTERACT THE TORQUE PRODUCED BY THE MAIN ROTOR. |
|
|
Term
| WHY IS IT IMPORTANT THAT THE LEADING EDGE OF A SUPERSONIC AIRPLANE WING BE KEPT FREE FROM DENTS AND DAMAGE? |
|
Definition
| DENTS/DAMAGE WILL CAUSE A NORMAL SHOCK WAVE TO FORM AND SLOW THE AIR IMMEDIATLY BEHIND IT TO A SUBSONIC VELOCITY. |
|
|
Term
| WHAT IS THE PURPOSE OF VORTEX GENEREATORS ON THE WING OF A HIGH SPEED AIRCRAFT? |
|
Definition
| KEEP HIGH-ENERGY AIR DOWN TO THE SURFACE OF THE WING, PREVENTING SHOCK-INDUCED SEPERATION. |
|
|
Term
| WHY ARE THE CONTROL CABLES OF LARGE AIRPLANES NORMALLY EQUIPPED WITH AUTOMATIC TENSION REGULATORS? |
|
Definition
| TO KEEP CABLE TENSION CONSTANT AS THE DIMENSIONS OF THE AIRCRAFT CHANGE DUE TO TEMPERATURE CHANGE. |
|
|
Term
| WHY IS IT IMPORTANT THAT THE BLADES OF A HELICOPTER ROTOR SYSTEM BE IN TRACK? |
|
Definition
| IF THE BLADES ARE NOT IN TRACK VERTICAL VIBRATION CAN DEVELOPE. |
|
|
Term
| WHY IS IT IMPORTANT THAT ANY REPAIRS TO THE CONTROL SURFACES OF AN AIRPLANE NOT CHANGE THEIR ORIGINAL CONDITION OF BALANCE ABOUT THEIR HINGE LINE? |
|
Definition
| CAN CAUSE FLUTTER IN CERTAIN FLIGHT CONDITIONS, WHICH CAUSES SURFACES TO TEAR OFF THE AIRCRAFT. |
|
|
Term
| IN WHAT FAA PUBLICATION COULD YOU FIND CORRECT CONTROL SURFACE MOVEMENT FOR A PARTICULAR AIRPLANE? |
|
Definition
|
|
