The generator, with a GenTent installed, was secured in four different orientations (wind at the
front, rear, left and right sides) near the rear of an open 6’ x 12’ trailer that was towed on a highway
with wind speeds measured in excess of 70 mph in order to determine the ability of the GenTent
to survive sustained high winds.
The GenTent is rated for forecast winds of 70mph. As this is measured above the boundary layer (10 meters or about 33 feet up), ground level wind speeds are significantly less. Using the
Wind Power Law and the Log Wind Profile calculations, a 70mph forecast wind translates to a range from 35mph to 45mph on the ground. Using this same calculation, a ground wind speed of 70mph tranlsates to over 110mph above the boundary layer (or forecast wind speeds).
For each orientation, a Panasonic PV-DV53D digital camcorder forward of the generator, and a
Microsoft HD-3000 webcam to one side of the generator, were used to capture video (for purposes
of documenting a product failure, should that be the case).1 In addition, an Extech HD350 Pitot
Tube Anemometer, was mounted approximately two feet from the generator to record the wind
speed at the generator
When subjected to sustained high winds at 70mph-80mph ground speed, the side of the GenTent canopy facing the wind was
pushed in and the entire canopy shook mildly, while the skirt tended to float upward toward a
horizontal position unless the wind direction was directly toward the front of the skirt. The GenTent stayed attached.
When subjected to sustained winds of 35mph-45mph ground speed, the GenTent was tested using the standard electrical skirt, the standard electrical skirt with newly developed high wind clips, and the clear vinyl electrical skirt. Under these three scenarios, the standard electrical skirt did not float upward below 35mphs, while both the clipped standard skirt and clear vinyl electrical skirt did not float up at 45mph or below.