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PRESS RELEASE

MESA, Arizona, July 27, 2002 —Centripetal Dynamics Hybrid Turbine Alliance

Centripetal Dynamics has secured a strategic alliance with the Solar Turtle Corporation to support the development of a solar hybrid disc turbine. The development support will be focused on the Tucson Electric Power project called “Greenwatts”.

The Solar Turtle organization is also involved with local geothermal projects in which the group is very interested in using the Centripetal technology as the prime source of power generation for the facility.

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