It isn't a 'wavy thing', it's a swashplate.
Quote:
https://en.wikipedia.org › wiki › Swashplate
Swashplate - Wikipedia
A swashplate consists of a disk attached to a shaft. If the disk were aligned perpendicular to the shaft, then rotating the shaft would merely turn the disk with no reciprocating (or swashplate) effect.
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If he says 'wavy thing' one more time....
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