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9 Cards in this Set

  • Front
  • Back
what type of lines are used on aircraft drawings to indicate hidden views, center lines, and alternate position lines

hidden line- a medium width line made up of short dashes. (represents the edge that cannot be seen when looking at the part from a specific position.)

center lines- thin lines composed of alternating long and short dashes. (used to indicate the center of an object or void)

alternate position lines- medium width lines composed if one lining and two short evenly spaced dashes. (used to show the alternate position of a part or the relative position of a missing part.)

define tolerance as used in aircraft drawings

the difference between the plus and minus allowable dimensions of a part. (+ & - of .005=.010)
define clearance as used in aircraft drawings
clearance is the dimensions given for the space between parts

what info is given in the title block of a blue print

drawing number

name of part or assembly



name of the firm

name of the draftsman

name of the checker

name of the approving official

why are dimensions used and how are they shown on the aircraft drawings

dimensions are the solid narrow lines, broken at midpoint for the insertion of measurements. (used to indicate the size of an object)

how can a change to an aircraft drawing be identified

by its version letter. (A,B,C, etc.) the revision letters are usually listed in the table next to the title block or in the corner of the drawing.
why is the "bill of materials" associated with aircraft blueprints

it is a list of parts and materials necessary for fabrication or assembly of a component or system

why are symbols used when drawing aircraft blue prints

symbols are a type of shorthand used in aircraft drawing. they express the characteristics of a component with minimum amount of drawing or writing.
how many views are required to determine the shape of an object




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