Definition
A physical teaching aid — typically a small model propeller or a desk lamp — used by an instructor to demonstrate an abstract aerodynamic or operational concept in a concrete, visible way. Examples include rotating a model prop to show angle of attack and relative wind, or using a desk lamp to represent the sun when explaining shadows, position lights, or visibility.
Plain English
Everyday objects an instructor uses as props to make a hard-to-picture idea easy to see. Holding up something real helps the student grasp the concept faster than words alone.
Context Anchor
Seen in flight-instructor training when discussing how instructors communicate ideas and use visual aids during ground instruction.
Why Pilots Care
Aviation concepts like relative wind, blade angle, and lighting geometry are difficult to grasp from text or speech alone. A simple physical object turns an abstract idea into something the student can see and reason about, which speeds up learning and reduces misunderstanding.
Intuition Check
Do not read this as the name of a special aircraft part or FAA-required tool. Here it is simply an example of everyday objects used as teaching aids.
Example Sentence 1
The instructor used a model prop to show how blade angle changes with throttle setting.
Example Sentence 2
Using a desk lamp on the table, she practiced giving precise directions the way a CFI would during a preflight briefing.