difference between horizontal axis wind turbine and vertical axis wind turbine

Discount Packages Wind Turbine & Solar Science Fair Experiments Kits

Vertical vs Horizontal vs Hydro Wind Turbine Level 2 Science Experiment Kit

$199.95

Discount Packages Wind Turbine & Solar Science Fair Experiments Kits

Vertical vs Horizontal vs Hydro Wind Turbine Level 3 Science Experiment Kit

$199.95

Discount Packages Wind Turbine & Solar Science Fair Experiments Kits

Vertical vs Horizontal vs Hydro Wind Turbine Science Experiments Kit Level 1

$99.95