variable shape wing
variable span wing
variability of wind
virtual variable span wing
VAWT
venturi           natural venturi, artificial venturi, venturi effect,
Vertical Axis Wind Turbine,
Vertigo, Inc.
Very Large Free Flying Sails (VLFFS)
vibrating cables
vibrating wires
vibration
vibration powered generator
volt
voltage regulator
volt meter
vortex
vortex rolls

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