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Chapter 1: Aircraft Assembly and Rigging
Terms in this set (80)
The construction technique in which the skin is fastened to a sub-structure or skeletal framework is called ____________.
Aircraft lift producing surfaces that can be asymmetrical or symmetrical are called __________.
Helicopter rotor blades and high speed aircraft designs typically use________ airfoils.
_________ wings have internal braces and require no external support.
___________ is caused by an out-of-balance condition that can lead to catastrophic failure of an aircraft and is a primary design considerstion for control surfaces.
_____________ _________ provides a metal cover control surface with a stiffer structure that reduces the substructure of the control surface and thereby reduces weight.
_____________ _____________ are short, low aspect ratio airfoils arranged in pairs that prevent shock-induced separation at higher speeds.
Landing gear on aircraft is either __________ or __________.
____________ _______ often incorporate vibration isolators and absorb thrust in engine vibrations.
The tail structure of an aircraft is called the ______________.
rib stop doublers
The flexing of the structures of pressurized cabins during cabin pressurization and depressurization cycles called for the need to install ______ ______ ______ to prevent metal fatigue leading to the breaking apart of the aircraft.
The deflection of the oncoming airstream upward over the wing is called the __________.
The portion of the airfoil where the air flow over the upper surface rejoins the lower surface is called the _________ _______.
The part of the airfoil that means the airflow first is called the ___________ _______.
The downward deflection of the airstream as it passes over the wing and passed the trailing edge is called the _________.
The characteristic curve of the airfoils upper and lower surfaces is called the __________.
An imaginary straight line drawn through the airfoil from the leading edge to the trailing edge is called the ___________ _________.
angle of attack
The angle between the chord line of the airfoil and the direction of relative wind is called the _______ ____ ________.
_________ are spaced at intervals throughout an airfoil structure and form the shape of the leading rdge, camber and trailing edge.
The ______ ________ runs the length of an airfoil from the root to the tip and is the main spanwise member of the structure that carries the aerodynamic load to the fuselage structure.
Air deflected by an airfoil produces _________ that must be transmitted into the structure in such a manner that the airplane can be balanced in every condition of flight.
center of lift
The point at which the air pressure is produced by the wing can be considered concentrated that can be found just slightly behind the center of gravity is called the _______. __ ____
sitka spruce solid laminated
Wood spars are usually made of _____ ______ and may be _____ or _____.
_____ ____ are installed at the leading edge to prevent air loads from distorting the leading edge and are placed between each of the full-length former ribs.
_______ _____ are used to secure the control surfaces into a fixed position when the aircraft is parked and can be installed internally in the cockpit or externally directly on the control services.
A region of _____ pressure is created above an airfoil when air passes across it.
The steel wire that runs from the front Spar inboard to the rear star outboard in a truss-type Wing is called a _______ wire.
A control device that destroys lift by disrupting the airflow over part of the wing is called a _______.
the control surface devices that diffuse the wingtip vortices and reduces drag are called ________.
The _________ ____ is the extension of the vertical stabilizer that may extend almost to the cabin section.
An all movable horizontal tail surface is called a ___________.
anti servo tab
An all-movable tail surface usually has a large tab installed on its trailing edge called an _______ _______ ____.
The movable surfaces on a v-tail design are known as _____________.
Aircraft that utilize a tailwheel type landing gear configuration are called ________ gear airplanes.
Aircraft using a nose wheel type landing gear configuration are called __________ gear aircraft.
Almost all piston powered aircraft engines are enclosed in a ___________ ___________.
Heat is removed from the cylinders of an air-cooled engine by forcing air to flow through _________ on the cylinders.
The amount of air flow through the fins of a high-powered engine is usually controlled by the opening and closing of the _______ ________.
cowl flaps are normally in the _______ position during ground operations.
The ______________ axis is the straight line passing through the fuselage from the nose to tail. The motion about this access is referred to as _____.
The axis that extends from wingtip to wingtip parallel to the wingspan at right angles is the ___________ axis. Motion about this axis is referred to as the _________.
The axis that can be envisioned as a straight line from the top to the bottom of the airplane and is perpendicular to the other two is the _________ axis. Motion about this axis is referred to as ______.
__________ is the characteristic of an airplane in flight that causes it to return to a condition of equilibrium.
______________ are measuring devices that check tension of aircraft control cables.
go no go
A _______________ gauge is used to ensure that a cable terminal is properly swaged onto a cable end.
A _____________ is a type of cable fastener that enables an adjustment of the cable tension.
______________ is the upward angle between the wing and the lateral axis of the airplane which provides lateral or roll stability.
A ______ prevents contact between a control cable and the aircraft structure to prevent wear on a cable and damage to the structure.
When plain flaps are lowered, they ____________ the camber of the wing.
A _______ ______ is usually mounted on a control surface to correct for out of trim condition.
A _________ type aileron has its hinge line located far back enough that its leading edge will protrude below the wing surface when the aileron is raised.
To compensate for aileron drag, many airplanes use rudder-aileron ____________ __________.
A wing should ideally stall first at the __________.
wing tip vortice
_______ ________ __________ is created by the difference in pressure between the upper and lower surfaces of a wing that cause air to spill over the wing tip.
__________ are a popular method of controlling wingtip vortices on a modern, high-speed aircraft.
__________ __________ are installed as a simple method to stop or reduce the spanwise flow of air on a wing.
_________ ________ is the tendency of swept-wing airplanes towards a combined rolling and pitching oscillation.
______ _________ are used in the Boeing 747 to prevent Dutch roll.
If a wing is rigged to reduce its angle of incidence and decrease its lift than the wing is said to be ______ ___.
angle of incidence
The angle formed between the chord line of the wing and the longitudinal axis of the aircraft is called the _______ ___ _______.
The rotor of an autogyro is turned by _______ forces.
vertical tail rotor
The use of a __________ _____ _______ on a single rotor helicopter compensates for the torque of the main rotor.
Helicopter vibration is corrected through blade _________ and __________.
_______________ is the state of flight where relative winds turns the main rotor system as opposed to the engine power turning the rotor.
Helicopter power output is controlled by the _______ pitch control.
The pitch of the tail rotor is controlled by ________ operated by the pilot.
A helicopter is inherently __________.
The helicopter control that changes the pitch of the rotor blades at a certain point in their rotation is called the _________ pitch control.
What are the two types of fuselage construction used in modern aircraft?
the complexity and the weight of the retraction system
What makes retractable landing gear impractical for small, slow aircraft?
twisting and bending loads are exerted. the wing spar is designed to flex and carry these loads
In flight, name two types of loads that are imposed upon the structure and explain what is primarily responsible to carry these loads.
What type of structures are primarily used in fabric covered airplane wings?
aileron rudder elevator
What are the three primary controls of an airplane?
the three axes of an aircraft passed through a common reference which is the CG. It is the theoretical point where the entire weight of the aircraft is considered to be concentrated.
Explain the concept of center of gravity.
plain split slotted fowler
List the four main types of flap designs.
Where can the specifications in degrees or inches for the total travel of aircraft flight controls be found?
What are the two methods by which the leading-edge slats may be extended?
small triangular strip of metal or rubber installed on the leading edge of the wing at the wing root
What is a stall strip?
gravity centrifugal force lift drag
What are the four forces acting on a helicopter rotor?
direct shaft free turbine
What are the two types of turbo shaft engines used to power a helicopter?
Sets with similar terms
Jeppesen Airframe Ch. 1 Section A (Aircraft Design…
Assembly and Rigging