windfarm v1.0.0

WindFarm.js

Power in watts:

WindFarm.power({
  velocity: 40, // velocity (m/s)
  efficiency: .25,
  diameter: 48, // diameter (m)
  limit: 800000, // turbine limit
  quantity: 20
})

Defaults:

WindFarm.power({
  velocity: 20,
  efficiency: .25,
  PI: 3.14,
  diameter: 48,
  density: 1.2,
  quantity: 1,
  limit: 800000
})