Definition
A registered trade name for a clear, transparent thermoplastic sheet material made from polymethyl methacrylate (acrylic), historically used for aircraft windshields, canopies, and cabin windows.
Plain English
A brand name for a type of see-through plastic sheet used to make aircraft windows and canopies.
Context Anchor
Seen in aircraft weight-and-balance data, especially when the balance point is shown as a percent of the mean aerodynamic chord.
Derivation
Temac is formed from “trailing edge” and “MAC,” meaning “mean aerodynamic chord.” “Trailing edge” means the back edge of a wing, and the mean aerodynamic chord is the wing’s average reference chord used for balance calculations.
Why Pilots Care
Accurate CG placement relative to the TEMAC ensures the aircraft remains stable and controllable.
Intuition Check
Temac is not an instrument or a system. It is a location: the aft end of the wing reference line used for balance calculations.
Example Sentence 1
The mechanic checked the Temac canopy for crazing before signing off the inspection.
Example Sentence 2
Mechanics use the TEMAC as a reference when computing the moment arm for loaded cargo.