Notes

-Technical drawing is more than just a means of representing an object. Peter Booker, the preeminent scholar on the history of technical drawing, notes that drawing is a fundamental concept of engineering thought

-The earliest drawings were found on cave walls

-Next drawings were found on animal hide, then vellum

-Everything that is man made has started from a sketch

-There are almost one hundred different work disciplines for drafters and designers

-These include Aerospace, Highways, Parks and Recreation, Electronic, Nano-Technology, Medical, Furniture, High Voltage Electricity, Automotive and many more

-Drawing is the universal language!

-The Chinese revolutionized drafting when they invented rice paper

-A major innovation in physical drafting supplies was using animal skin to record drawings, which was the dominant medium until the nineteenth century when synthetic vellum was created

-The oldest piece of drafting supplies that has been discovered is a drawing board with a technical plan for a temple in Lagash, Babylon dating from 3,000 BC

-In 1842, the process of creating a blueprint was invented by Sir John Herschel

-2-D CAD systems were developed in the 1980s

-3-D CAD systems were developed in the 1990s The Boeing 777 is the first jetliner to be 100 percent digitally designed using three- dimensional computer graphics. Throughout the design process, the airplane was "pre- assembled" on the computer, eliminating the need for a costly, full-scale mock-up. Dodge Neon was designed using 3-D CAD system CATIA

-The technical drawings must be detailed and must follow any specification or detail required in the industry, as for example happens in the field of engineering

-When an idea is conceived, technical drawing is necessary so that it can be transmitted. If the idea can not be communicated properly it can never be carried out. Technical drawings serve as instructional manuals for something that needs to be constructed or manufactured

-Technical drawings are usually made using computer programs specially designed for that purpose. They can be made in two or three dimensions

-The difference between a technical drawing and a more informal drawing or sketch , Is the degree of detail. With a technical drawing you get a meticulous look at the whole object; From the layout and the thickness of the lines to the descriptive geometry, text, size and symbols

-Technical drawing is the act or discipline of composing drawings that visually communicate how an object should be constructed or how it should function. This discipline is necessary to communicate ideas in the field of industry and engineering

-In order for the drawings to be understood, creators use easy-to-understand symbols, perspectives, units of measurement, rotation systems, and visual styles. Together, they construct a visual language that affirms the understanding of that object