Aircraft Drawings

Front 1

Working Drawing

Back 1

Drawings that can provide the information required to construct, assemble, install, or manufacture a part or component.

Front 2

Revolved section

Back 2

A detail on an aircraft in which the external view shows the shape of a parr’s cross section as though it were cut out and revolved.

Front 3

Removed section

Back 3

A type of drawing used to illustrate a cut out section of a part from a different angle.

Front 4

Complete sectional view

Back 4

A type of sectional drawing that is used to show complex assemblies and identify separate parts in the assembly.

Front 5

Half sectional view

Back 5

A view in which the cutting plane extends only halfway across the object as an exterior view.

Front 6

Vanishing point

Back 6

Points in a drawing that converge to give the appearance of having depth.

Front 7

Visible lines

Back 7

A line on an engineering drawing that represents a portion of an object that can be seen.

Front 8

Hidden lines

Back 8

Lines used in drawings to indicate invisible edges or contours.

Front 9

Center lines

Back 9

In aircraft drawings, the alternate long and short dashes indicating the center of an object or part of an object.

Front 10

Extension lines

Back 10

The lines of a technical drawing that extend from a view for the purpose of identifying a dimension.

Front 11

Dimension lines

Back 11

A light sold line broken at its midpoint for insertion of measurement indications. Dimension lines typically have outward pointing arrowheads are each end to show origin and termination of a measurement.

Front 12

Cutting plane line

Back 12

A line used in aircraft drawings that consists of alternating medium or heavy dashes and two short dashes with an arrowhead at each end.

Front 13

Phantom lines

Back 13

Thin lines made up of alternating long dashes and two short dashes. Used to show an alternate position or a missing part in a mechanical drawing.

Front 14

Break lines

Back 14

A line used in drawings to indicate that a portion of the object is not shown.

Front 15

Leader line

Back 15

A light line with an arrowhead that extends from a note, number, or box in an illustration to a part.

Front 16

Section line

Back 16

The crosshatching used in a cut away section of the aircraft drawing to identify a type of material.

Front 17

Nominal dimension

Back 17

A dimension on a drawing that represents the basic size of the part shown.

Front 18

Fuselage station numbers

Back 18

Distances measured along the longitudinal axis of an airplane. Represents distances from the datum in inches.

Front 19

Datum

Back 19

An arbitrary reference line from which all measurements are made when determining the moments used for weight and balance computations.

Front 20

Water lines

Back 20

A vertical line used to locate a position on the fuselage of an aircraft. The zero reference is called water line zero.

Front 21

Buttock lines

Back 21

A measurement of width, left or right of, and parallel to the longitudinal axis. Also referred to as the butt line.

Front 22

Wing station

Back 22

Point measured from the centerline of an aircraft (buttock line zero) toward the wing tip. Indicates the distance in inches from the centerline.

Front 23

Perpendicular bisection

Back 23

I’m applied geometry, a line that bisects another line at 90 degrees, dividing it into two halves.