Aircraft Drawings Flashcards
What kind of line shows a center line?
Alternate short and long dashes.
Station Number “352” would mean what?
Station numbers is a number used to identify the number of “inches” from the datum, station number 352 would mean 352 inches from the datum is a point on the aircraft.
Orthographic Projection can show how many different views?
As many as 6 views.
What does a break line look like?
a wavy or a zigzag line used to show that a part has been broken off and only part of it is shown.
Hidden line
medium-weight dashed line.
Used to show an edge or object not visible to the viewer.
Visible (or object) line
medium solid line
Center line
Alternate short and long light dashes
Detail drawing
A description of a single part that includes enough information to allow for the part to be manufactured (fabricated).
Assembly drawing
a drawing that shows the way various detail parts are put together to form an assembly or a sub-assembly.
Assembly drawings refer to the various parts to be assembled by the drawing number of their detail drawings.
Orthographic view
When the drawing shows to object from up to 6 different sides of the part.
phantom line
a light line made up of an alternate long dash and two short dashes.
It shows the location of a part that is used as a reference
Break line
a wavy or a zigzag line used to show that a part has been broken off and only part of it is shown.
Center line
alternating long and short dashes.
They indicate the center of an object or part of an object. Where centerlines cross, the short dashes intersect symmetrically. In the case of very small circles, the centerlines may be shown unbroken.
Extension lines
Dimension lines
show the dimensions of a line/part
Removed section
illustrates particular parts of an object. It is similar to revolved sections, except it is placed at one side and, to bring out pertinent details, often drawn to a larger scale than the main view on which it is indicated.
What does blocking in the views accomplish?
it allows you to organize the sketch so it will clearly show the most information
14 CFR part 91
Requires that maintenance records contain “a description (or reference to data acceptable to the administrator) of the work performed…”
Graph paper is available in what dimmensions?
in either four or five squares to the inch, ruled with light lines.
If the exact specifications of a material are shown on the drawing,…
The easily drawn symbol for cast iron is used for the sectioning, and the material specification is listed in the bill of materials or indicated in a note.
Cast iron symbol
Repeated single line pattern stretching across the part
Rubber, plastic, or electrical insulation symbol
Repeated triple grouped straight lines stretching across the part
Steel symbol
Repeated double grouped straight lines stretching across the part
Allowances
the difference between the nominal dimension of a part and its upper or lower limit.
Dimensions
the measurements used to describe the size of an object. it is the ideal or “perfect” size of the part.
Tolerances
the differences between the extreme and allowable dimensions of a part
Zone identifiers are placed how often along the edge of the drawing
Every foot along the side of the drawing.
The identifiers along the bottom of the drawing are numbers and those up the side of the drawing are letters.
Schematic diagrams show what and do not show what?
They show the functional location of components in relation to one another, but they do not show the physical location or the size and shape of the components
Pictorial diagram
Similar to a photograph, a pictorial diagram shows an object as it appears to the eye, but is not satisfactory for showing complex forms and shapes