Electrical/Electronic Drawings, Continued
Aircraft
electronic
prints
Electro-
mechanical
drawings
Logic diagrams
Aircraft electronic prints include isometric wiring diagrams and block
diagrams both simplified and detailed. The purpose and functions of these
diagrams are similar to their shipboard counterpart. Aircraft electronic
wiring diagrams fall into two basic classes: chassis wiring diagrams and
interconnecting diagrams.
Electromechanical devices such as synchros, gyros, accelerometers, autotune
systems, and analog computing elements are common in avionic systems.
You need more than an electrical or electronic drawing to understand these
systems; therefore, we use a combination of mechanical drawings and
electronic or electrical drawings and call them electromechanical drawings.
Electromechanical drawings show only those items essential to the operation
of a particular piece of equipment or part.
Logic diagrams describe the operation and maintenance of digital computers.
Simple logic operations used in digital computers are based on the theory in
Boolean algebra that an element can be in only one of two possible states at
any given time and that there are three basic operations, AND, OR, and
NOT. The two states, represented by 0 and 1 respectively, correspond to the
binary number systems consisting of the symbols 0 and 1. Computer
operating terms NOR, NAND, INHIBIT, and EXCLUSIVE OR correspond
to the basic AND, OR, and NOT.
Continued on next page
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