AMT-Blueprint Design Flashcards
Purpose of aircraft drawings
- Link between design engineers send maintenance technicians
- Communicates ideas concerning construction and assembly resulting tangible products.
_________ allow engineering concepts and/or tweaks to be pre-visualized on a whim, condenses days of work into hours.
Computer Graphics
Rough drawings made without the use of instruments. Specific bit of info with minimum detail.
Sketches
Drawings made with instruments, provide all info (including dimensions) needed to fabricate a part.
Detail drawings
Drawings that describe the relationship of two or more parts and how they are assembled.
Assembly drawings
Drawings with all necessary information for a part assy in the final installation position in the aircraft.
Installation drawings
This view of a drawing shows the way a component would appear if it were cut in half through the middle.
Sectional view
A _____ is used when interior hidden features cannot be shown. Shows internal features by removing exterior half.
Full section
Shows exterior and interior of a part on each half portion of the object. Upper half shows interior whereas bottom half shows exterior.
Half-section
Drawn on exterior, shows how a part is sectioned and turned 90⁰ towards viewer to show shape that is hidden. (Think spokes on a bike)
Revolved section
Similar to revolved, but cut piece is moved to the side to illustrate another angle, sometimes it is upscaled.
Removed section
Shows the outside of a component with parts of it cut away to show inside
Cutaway drawings
This method of illustration, helps to show exact size and shape by illustrating the faces (6) of an object. Front, top, bottom, rear, right, left
Orthographic projection drawings
Shows only a part of the object but in greater detail.
Detail view
Like a photo, shows object as it appears to the eye. General appearance.
Pictorial drawings
Shows as appears to observer. Angles and dimensions not accurate due to skewing by perspective
Perspective drawing
Combo of views of orthographic projection and tilts forward so all 3 sides can be seen in 1 view. Lines are parallel and dimensioned as orthographic
Isometric drawing
Like Isometric but two axis are always right (90⁰) angles
Oblique drawings
Pictorial drawing of two or more parts that fit together as an assy, parts are floating from their path. Individual parts and relative positions
Exploded-view drawings
Graphic representation of an assy or system, methods of principles of operation
Diagrams
Identifies each of the components in the systems and shows location and how to install.
Installation diagrams
Locate components with respect to each other within the system. Used for troubleshooting. Principle of operation
Schematic diagrams
Show various functions of a system, drawn as boxes with lines connecting them.
Block diagram
Show wires in a particular section of aircraft electrical system
Wiring diagram
Blocked off area of drawing in lower right corner. Contains all info needed to manufacture.
Title block
The part name goes here
Title box
Number assigned to a drawing to identify it.
Drawing number
A list of materials and parts necessary for the fabrication/assy of a component. Ruled columns, part numbers, name of part, materialist is instructed of.
Bill of materials
Upper right corner, where revisions are recorded
Revision block
_____ are added to bring attention to or elaborate details that stray from the norm. They are typically used to convey info that could otherwise clutter the drawing.
Notes/flagnotes
____ are locations based on numbers and letters listed along the borders of a drawing, read right to left. Much like a map.
Drawing zones
When a given dimension on a drawing has an allowable variation
Allowances and tolerances
What is projection?
2 dimensional display of a 3 dimensional object
__________ is used in detail drawings, easily dimensioned and often used the most to manufacture parts. Up to 6 views as well as auxiliary views if there is more explanation of detail needed.
Orthographic projection
What is the principle view?
The principle view is the face of am object that gives the most info about the parts dimensions, main shape and key features.
_____ drawings are 3d depictions of an object with the baseline and two axis at 30 degree angles
Isometric drawings/projection
_________ are drawings how the eye sees an object. Can be drawn in one, two and three point form.
Perspective
______ is similar to isometric however, one base dimension is parallel to base line, others draw at 30 to 60 degree angles
Oblique projection
______ show how a part or assembly is installed on an aircraft or within its system.
Installation drawings
____ diagrams show a principle of operation without regard to accurate part depiction. Used for troubleshooting
Schematic diagrams
Used to simplify troubleshooting of complex systems, depicted as blocks with lines to one another
Block diagrams
These contain info such as wire size, Identification number and component part numbers
Wiring diagrams
Procedural aid to troubleshooting aircraft systems, offers info of system operation without getting structural. Appears as questions and answers
Logic flowcharts
Visual depiction of parts to help better visualize operation of a particular system
Pictorial diagrams
Used on outlines to illustrate a visible part
Visible lines
Indicate invisible edges or contours
Hidden lines
Thin line made up of alternating long and short dashes. Shows middle of a symmetrical part or holes.
Center lines
Light lines that extend from point where a measurement is made. They do not touch visible lines
Extension lines
Light lines with arrowheads. Broken in middle. Dimensions inserted
Dimension lines
Thickest line, indicate plane in which sectional view of object is taken. Arrowheads show direction in which view is seen
Cutting plane lines
Light lines, alternating long dashes with two short dashes/dots. Indicates presence of another part and are included to show other parts location
Phantom lines
Zigzag lines that indicate the edge of a large part, thin lines
Long break lines
Thick lines that are used across small dimensions to show a part that continues
Short break lines
Lines with arrowheads, thin, extend from note, number or info to a part. Never cross dimension lines
Leader lines
These lines are used to show differences in types of materials exposed
Section lines
Used to avoid cumulative errors, holes are located by dimensioning their centers
Base line dimensions
Any object that has 3 classes of dimensions, Width, Depth, Height
Contour rule
Identify locations fore and aft along fuselage. Referenced from a datum point.
Fuselage stations
Identify vertical locations of aircraft.
Water lines
Are measured from the right or left of the fuselage center line
Butt lines
Is a arbitrary vertical plane of reference from which all longitudal dimensions begin
Datum point
Used to reference stations lines of tailboom of some helicopters
Boom stations
