Mariah Technologies Inc.

H.A.W.T. technology works best facing the wind. When there is a change in wind direction (average 3-4 days); all "Horizontal Turbines" have to be halted in order to rotate the nacelle for the rotor to face into the wind. Large gears, breaks, bearings and electric motors are needed in the nacelle to accomplish this task.

Point: If the massive propeller was allowed to rotate during this exercise, the gyratory effect would cause severe damage, not only to the infrastructure in the nacelle area; it would have an appreciable effect on the tower and base structures.

To further enhance the "All Directional Feature" and protect the turbine from extreme atmospheric anomalies, an enclosure was needed. Said device had to meet and answer specific design criteria's. (1.) How do you enclose the turbine without interfering with the wind flow? (2.) How do you address the all directional feature? – AND- (If Possible) Could this device enhance the Power Coefficient Curve?

Answers to these questions are illustrated in "Figure 4". The multi-directional air foil housing for the turbine has an inside diameter of 20'-6", an outside diameter of 22'-0" and an overall height of 12'-8". The air foils (gold color) are 16" wide, and 10'-0" high. Each air foil has a positive and negative camber. Not only will the air foils provide needed protection, the geometry will increase ambient wind speed to the turbine, and decrease the drag coefficients.

The insulated "Dome" (black color) addresses 4 specific needs; (1.) Protection from rain, snow and ice. (2.) Lightening strikes. (3.) Noise reduction. (4.) Reduces the wind vortex by a factor of 80%.

Summary :
H.A.W.T. technology requires significant resources (gears, breaks, motor devices, etc.) to achieve optimal performance criteria when the wind changes direction. In terms of added devices, man hours, and maintenance, one could argue; "H.A.W.T. needs to improve their technology.