...Inner vanes of tail-feathers yellow... 
Frank M. Chapman 「Color Key to North American Birds」
...A four-bladed fan lifted on a slenderpedestal, sufficiently high above thesurface of the wing for the vanes tobe free of the central propeller...
Various 「Astounding Stories of Super-Science April 1930」
...An hour later they landed on theflat roof of the new Capitol Building,sinking lightly to rest as a feather,nursed to a gentle landing by thewhirring vanes of the helicopter...
Various 「Astounding Stories of Super-Science April 1930」
...In addition to other damage done at this time, two of the vanes of the wind-mill were torn off by the violence of the wind...
David Collins 「An Account of the English Colony in New South Wales, Vol. 2」
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