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AIRFRAME ORALS
CHAPTER 1 - AIRCRAFT STRUCTURAL ASSEMBLY AND RIGGING
Question | Answer |
---|---|
WHAT IS THE FUNCTION OF A VORTEX GENERATOR? | TO DELAY OR PREVENT SEPERATION OF THE BOUNDARY LAYER. |
WHAT ARE THE THREE AXES OF AN AIRPLANE? | LONGITUDINAL (NOSE TO TAIL), LATERAL (WING TIP TO WING TIP), AND VERTICAL (BOTTOM TO TOP). |
WHAT ARE THE THREE PRIMARY FLIGHT CONTROLS OF AN AIRCRAFT? | THE AILERONS, ELEVATOR, AND RUDDER. |
NAME SEVERAL SECONDARY FLIGHT CONTROLS AND DESCRIBE THEIR GENERAL PURPOSE. | CONTROLS THAT MODIFY THE EFFECT OF THE PRIMARY CONTROLS. TRIM TABS, SERVO AND ANTI SERVO TABS, AND SPRING TABS. |
NAME SEVERAL TYPES OF AUXILIARY FLIGHT CONTROLS AND DESCRIBE THEIR GENERAL PURPOSE. | LIFT MODIFYING DEVICES ON AN AIRCRAFT. FLAPS, SLATS AND SLOTS, ETC. |
WHAT IS A SERVO TAB? | SMALL HINGED DEVICE INSTALLED ON A CONTROL SURFACE TO AID THE MOVEMENT OF A PRIMARY CONTROL |
WHAT IS A SPRING TAB? | SMALL HINGED DEVICE INSTALLED ON A CONTROL SURFACE TO AID THE MOVEMENT OF A PRIMARY CONTROL AT HIGH SPEEDS WHEN CONTROL FORCES BECOME TOO HIGH. |
WHAT IS A BALANCE TRIM TAB? | SMALL HINGED DEVICE INSTALLED ON A CONTROL SURFACE TO AID THE MOVEMENT OF A PRIMARY CONTROL THE TAB IS POSITIONED BY A CONTROL ROD CONNECTED TO THE FIXED SURFACE. |
WHAT ARE THE FOUR MOST COMMON TYPES OF HIGH LIFT DEVICES? | LEADING AND TRAILING EDGE FLAPS, SLATS, AND SLOTS. |
DESCRIBE SOME OF THE TOOLS USED TO CHECK CONTROL SURFACE TRAVEL? | A UNIVERSAL PROPELLER PROTRACTOR OR SPECIAL CONTROL SURFACE PROTRACTOR. |
NAME THREE MECHANICAL METHODS BY WHICH FLIGHT CONTROL SYSTEMS MAY BE ACTUATED. | CABLES, PUSH-PULL RODS, AND TORQUE TUBES. |
WHAT IS A FAIRLEAD? | IT IS A DEVICE TO PREVENT A CABLE FROM RUBBING ON THE AIRCRAFT STRUCTURE. |
WHAT ARE THE MOST LIKELY PLACES FOR A CONTROL CABLE TO WEAR OR BREAK? | WHERE THE CABLES PASS OVER PULLEYS OR THROUGH FAIRLEADS. |
WHAT INFORMATION IS REQUIRED BEFORE A CABLE RIGGING CHART CAN BE USED? | THE AMBIENT TEMPERATURE AND THE CABLE SIZE. |
WHAT IS THE FUNCTION OF A CABLE TENSION REGULATOR? | IT AUTOMATICALLY ADJUSTS THE CABLE TENSION TO COMPENSATE FOR EXPANSION AND CONTRACTION IN THE AIRCRAFT STRUCTURE. |
DESCRIBE THE FUNCTION OF A ROTORCRAFT COLLECTIVE PITCH CONTROL. | THE COLLECTIVE CONTROL CAUSES EACH ROTOR BLADE TO CHANGE ITS PITCH ANGLE BY THE SAME AMOUNT, THUS INCREASING OR DECREASING THE LIFT PRODUCED BY THE ROTOR. |
DESCRIBE THE FUNCTION OF A ROTORCRAFT CYCLIC PITCH CONTROL. | THE CYCLIC CONTROL TILTS THE MAIN ROTOR DISC BY CHANGING THE PITCH ANGLE OF EACH ROTOR BLADE DURING ITS CYCLE OF ROTATION, WHICH CAUSES THE HELICOPTER TO MOVE IN THE DIRECTION THE ROTOR TILTS. |
WHAT MECHANISM IS MOST COMMONLY USED TO COMPENSATE FOR THE TORQUE PRODUCED BY THE MAIN ROTOR OF A HELICOPTER? | THE TAIL (ANTI-TORQUE) ROTOR. |
HOW IS THE AMOUNT OF THRUST PRODUCED BY THE TAIL ROTOR CONTROLLED? | BY MOVING THE FOOT PEDALS. |
WHY SHOULD CONTROL SURFACES BE LOCKED WHEN AN AIRCRAFT IS PARKED? | TO PREVENT DAMAGE FROM THE WIND. |