Definition
An electrical charge produced when two dissimilar materials rub against each other and electrons transfer from one surface to the other, leaving one material positively charged and the other negatively charged.
Plain English
Static electricity created by friction. When two different materials rub together, tiny electrical charges build up on their surfaces.
Context Anchor
Seen in discussions of aircraft static buildup, radio noise, static discharge devices, and safe fueling procedures.
Derivation
From the Greek 'tribos' meaning 'to rub,' combined with 'electricity.' The name literally describes the source: electricity from rubbing. This helps remember that friction between surfaces is what creates the charge.
Why Pilots Care
Uncontrolled buildup can create sparks capable of igniting fuel vapors or interfering with avionics and navigation equipment.
Analogy
A common example is rubbing a balloon on your hair and then seeing it cling to a wall. The rubbing moves electrical charge, and the balloon holds a static charge afterward.
Grounding Statement
Picture rain or dust sliding across an aircraft in flight and leaving a static charge on the surface.
Intuition Check
Triboelectricity is not electricity supplied by the aircraft electrical system. It is static charge created by contact, rubbing, or separation between materials.
Example Sentence 1
Flying through heavy snow can generate triboelectricity on the airframe, leading to radio interference until the charge dissipates through the static wicks.
Example Sentence 2
Static discharge wicks on the wingtips and tail slowly bleed off triboelectric charges accumulated while flying through ice crystals.