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Definition
| Ability to resist abrasion, penetration, and distortion |
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Definition
| Ability to e bent permanently or twisted into various shapes without breaking |
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Definition
| Ability to return to its original shape after being deformed |
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Definition
| Actual weight of mateiral per cubic inch |
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Definition
| Abilty to become a liquid when heated |
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Definition
| Ability to carry heat or electricity |
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Definition
| A group of metals having iron as their principal element |
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Definition
Carbon Steel-has high content of carbon
Alloy Steel-a carbon steel that has small amounts of other elements |
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Definition
Carbon Steel-has high content of carbon
Alloy Steel-a carbon steel that has small amounts of other elements |
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Term
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Definition
| Thin layer of pure aluminum that protects the ase metal from corrosion |
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| Magnesium and Magnesium Alloy |
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Definition
| Highly corrosive and unpredictable fire hazard |
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Definition
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Definition
| Medium lines with short evenly spaced dashes |
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Definition
| Thin lines terminating with arrowheads at each end |
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Definition
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Definition
| Thin lines terminating with an arrow head or dot at one end |
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Definition
| Medium series of one long dash and two short dashes |
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Definition
| Give a 3D or pictorial view of an object, clarifies the orthographic drawing |
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Definition
| Object is rotated 45 degrees and tilted forward 30 degrees |
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Definition
| shows the exact shape of an object through the use of different views |
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Definition
| Are the most common source of maintenance information; combination of isometric and orthographic drawings |
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Definition
| Used as a guide or pattern, which is transferred to a piece of sheet metal to be cut and formed |
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Definition
| Indicates the beginning and end of a bend |
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Term
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Definition
| Distance from the bend tangent line to the mold point |
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Term
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Definition
| Always used in pencil and indicated by an "x" |
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Term
| Five Steps for Bend Allowance |
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Definition
SFBWB
Find setback, find length of flats, find bend allowance, find total width/length, find bend line location |
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Term
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Definition
| Used for laying out arcs or circles on metal, transferring measurements and to divide lines into equal parts |
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Term
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Definition
| Straight edge of the metal from where measurements are taken (used for measuring horizontal line location) |
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Term
| Cutting Equipment and Their Uses: Purposes |
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Definition
| Used to remove damaged areas and fabricate new parts |
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Term
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Definition
| Cuts up to 1/16 inch material and are used to cut straight lines only |
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Term
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Definition
| Have small serrations on the cutting edge to prevent slipping; maximum material thickness is 0.050 inch aluminum |
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Term
| Cutting Procedures (Aviation Snips) |
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Definition
| Never cut thicker materials than the snips are designed for |
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Term
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Definition
| Used for cutting metal that is too heavy for snips |
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Term
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Definition
| Identified by the number of teeth per inch |
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Term
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Definition
| Used for flat surfaces and outside arcs |
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Term
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Definition
Single cut-one row of chistel-shaped teeth set at an angle to the center line of the file
Double cut-has a second row of teeth set at an angle to the first row, leaving the teeth smaller and diamond-shaped |
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Term
| Files-Order of Coarseness |
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Definition
| Coarse, bastard, second-cut, smooth, dead smooth |
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Term
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Definition
| Skin Saw-a miniature, hand-held saw with a rotary-disc blade that is adjustable |
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Term
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Definition
| Cutting dies that are available in a variety of sizes and shapes |
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Term
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Definition
| Used for cutting heavy gage metal, use for squaring and mulitple cutting |
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Term
| Forming Aircraft Structures |
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Definition
| Fabrication of replacement of new parts, repair of formed parts, additional strength and reinforcements |
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Term
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Definition
| To back up metal when forming different curves, angles and seams |
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Term
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Definition
| For bending large sheets of metal of various thickness, requiring a specific degree of bend and bend radius |
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Term
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Definition
| Main difference is that the clamping bar is divided into sections which vary in width and are interchangeable |
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Term
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Definition
| For making bends or fold along edges of sheets of metal; best uited ofr folding small hems, flanges and seams up to 1 INCH |
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Term
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Definition
| A bench mounted machine with removable rollers which enable the mechanic to burr, turn, wire, bead, and crimp sheet metal |
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Term
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Definition
| A multi-purpose machine; main purpose use is pressing bearing races, bushings and flanging dies into place when heavy gage metal is being used |
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Term
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Definition
| Used to form a bend or flange in the center of a sheet of metal without distortion, such as lightening holes or beads in the cnter or a rib or bulkhead |
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Term
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Definition
| To reduce the weight of the structural member |
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Term
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Definition
| The degree of angle from the leading edge of the cutting edge to the trailing edge of the cutting edge which is 12 DEGREES, which forms the clearance and allows the drill to pass through material w/o bending |
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Term
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Definition
Inches-1/16 inch to 4 inch
Letter-A (0.234 inch) to Z (0.413)
Number-No. 80 (.0135) to No. 1 (.228) |
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Term
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Definition
| Hold drill 90 degrees to the work, turn crank handle at moderate speed, ensure backside of work is clear of electrical bundles, hydraulic lines, etc |
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Term
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Definition
| Ensure work is clamped securely in position, select proper speed for the material being drilled, set depth gage to proper depth, operate spindle and quill-feed handle or feed lever w/ a slow, steady pressure |
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Definition
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Term
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Definition
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Term
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Definition
| If the rivets are places too far from the edge, the sheet will turn up at the edge |
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Term
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Definition
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Term
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Definition
| Tick mark should not be more than 1/16 inch long |
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Term
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Definition
| The operation of beveling the mouth of a hole with a rotary tool |
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Definition
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Term
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Definition
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Term
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Definition
| For dimpling soft alloys and metals .063 of an inch thickness or thinner |
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Term
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Definition
| Raised head marking; magnesium only |
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Definition
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Term
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Definition
Should equal the thickness of the metal plus one and a half times the diameter of the rivet
(1 1/2 x D + Grip = Length) |
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Term
| Blind Rivets-Mechanical Lock |
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Definition
| When the stem is pulled and the bucktail is formed the lock goes in place to hold the stem, at this time the stem breaks off |
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Term
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Definition
Diameter-1/32 inch
Length-1/16 inch |
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Term
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Definition
| Length and Diameter-1/16 inch |
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Term
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Definition
| Short light structural members that are used to fill in between longeron to give added strength |
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Term
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Definition
| Same as monocoque construction, in addition to having formers, frame assemblies, and bulkheads (longerons and stringers) |
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Term
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Definition
| Constructed of spar, cuff, pockets, abrasion strip |
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Term
| Tail Group-Tail Rotor Group |
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Definition
| Primary purpose of the tail rotor on rotary wing aircraft is to counteract main rotor torque |
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Term
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Definition
| Principal Support of an aircraft while it is on the deck |
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Term
| Flight Control Systems-Fixed Wing Aircraft |
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Definition
Ailerons-control the rolling motion of the aircraft (longitudinal axis)
Elevator-control the pitching motion of the aircraft (lateral axis)
Rudder-controls the yawing motion of the aircraft (vertical axis) |
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Term
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Definition
| Indicate the longitudinal position of vertical planes perpendicular to the plane of symmetry |
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Definition
| Shallow; may be repaired by burnishing |
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Term
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Definition
Consistsof a filler, which has the same thickness and alloy as the skin and doubler
Doubler- has the same alloy but is one gage thicker |
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