Aircraft drawing Flashcards
(14 cards)
what kind of information is contained in the title block of a blueprint
1) a drawing number
2) name of the part or assembly
3) scale
4) date
5) name of the firm
6) name or initials of the draftsman
7) checker
8) and approving official
what types of lines are used on mechanical drawings to show alternate position? hidden views? center lines?
1) phantom lines show alternate positions: one long and two short
2) hidden lines are short dashes evenly spaces
3) center lines are alternate long and short dashes
how are dimension lines shown on aircraft drawings
dimension line are solid and usually broken at midpoint for insertion of measurement indications
thin, solid lines that indicate the extent and direction of a measurement. They are typically broken near the middle to provide space for the numerical dimension.
where and how are aircraft drawing changes identified
changes are usually listed as revisions in ruled columns either adjacent to the title block or at one corner of the drawing
define tolerance as used on aircraft blueprints
tolerance is the sum of the plus and minus allowance figures
difference between the maximum and minimum allowable dimensions
define clearance as used on aircraft blueprints
dimension allowable between parts
what is a bill of material associated with aircraft blueprints
a list of materials and parts necessary for the fabrication or assembly of a component or system
why are symbols used when drawing aircraft blueprints
allow for the quick and clear representation of various aircraft components and their features
standardized symbols ensures that anyone familiar with the symbol language can interpret the drawings correctly
how many views may be required to determine the shape of an object when reading an aircraft drawing
one, two and three view drawings are most commonly used
three views (top, front, and side) are sufficient to determine the shape of an object in aircraft drawings
how may an aircraft drawing of a part be drawn to bring out pertinent details
by drawing a detailed view at a larger scale than the principle view
what is the purpose of one view drawings
they are used for objects of uniform thickness such as gaskets, shims and plates
what are schematic diagrams generally used for
used for troubleshooting
what is an orthographic projection
it is a way of illustrating an object in a drawing showing different views at right angles to each other
describe the purpose and use of zone numbers on aircraft drawings
zone numbers on drawings are like the numbers and letter printed on the borders of a map. They locate a point. To find a point, mentally draw horizontal and vertical lines from the letters and numerals specified; the point where these lines intersect is the area sought
Zone numbers on aircraft blueprints are used to locate parts, sections, and views on large drawings
