Definition
A device that produces a high-voltage electrical spark by mechanically striking or compressing a piezoelectric crystal. When the crystal is squeezed, it generates a brief, high-voltage charge across its faces, which is used to jump a spark gap and ignite fuel or another flammable medium. In aviation, piezoelectric spark generators are used in some emergency or self-contained ignition applications where no battery or external electrical power is available.
Plain English
A small device that makes a spark by squeezing a special crystal. The squeeze creates enough electricity to jump across a gap and light a flame, without needing any battery.
Context Anchor
Seen in aircraft ignition and starting-system discussions, especially when describing small self-contained spark sources or igniter systems.
Derivation
From the Greek 'piezein' meaning 'to press' or 'to squeeze,' combined with 'electric.' The name describes exactly what the device does: it produces electricity by pressing on a crystal.
Why Pilots Care
Gives a dependable way to start the engine in cold conditions or when battery voltage is low, reducing the chance of a failed start.
Analogy
Like a kitchen gas-stove lighter. Pressing the button squeezes a small crystal and produces a spark with no battery involved.
Grounding Statement
Pressing on the right kind of crystal forces electrons to move and jump as a spark across a gap.
Intuition Check
Do not think of this as a small battery. It does not store electrical power for later use; it creates a brief high-voltage pulse when the crystal is stressed.
Example Sentence 1
The survival kit included a piezoelectric spark generator so the pilot could start a signal fire without matches or batteries.
Example Sentence 2
During the magneto check, the mechanic confirmed the piezoelectric spark generator produced a strong spark.