Gyroplane Sustains Flight Test Mishap.

SALT LAKE CITY--(BUSINESS WIRE)--Oct. 16, 1997--Groen Brothers Aviation, Inc. (OTC BB:GNBA) (GBA) reported that their H2X production prototype gyroplane experienced a roll-over incident on the ground today during series number fifty of their flight test program.

No one was injured; however, the aircraft sustained damage to the fuselage and to the rotor blades. The flight test series will continue when repairs to the aircraft have been made at the Salt Lake City manufacturing facility.

According to GBA President David Groen, the aircraft was beginning a routine takeoff and rolled to the right. "We do not know yet why this incident occurred, but are working closely with the appropriate authorities to determine the cause," he said.

Groen Brothers Aviation, Inc. is the designer and manufacturer of the Hawk series commercial gyroplane. Modeled on the autogyros of the 1930's but incorporating significantly advanced 1990's design and performance, the GBA Hawk is capable of fulfilling ninety percent of the jobs of a helicopter at a fraction of the cost. GBA has previously built and flown two prototype aircraft utilizing patented rotorhead technology. The H2X prototype is presently undergoing flight testing in preparation of fulfilling the company's order for 200 Hawk III VTOL gyroplanes from China's Shanghai Energy and Chemical Corporation.

Groen Brothers Aviation, Inc., is a fully reporting public company traded over-the-counter on the OTC Bulletin Board under the stock symbol "GNBA." For more information, visit the GBA Internet web site at http://www.groenbros.com .

CONTACT: Groen Brothers Aviation, Inc.

Cyndi Upthegrove, 206/241-8116

fax: [phone]

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