Groen Aeronautics Corporation (“GAC” and “Groen”) is the world leader in the science and technology of ‘Sustained Autorotative Flight’ in the form of gyroplanes and gyrodynes. GAC focuses on the design, development, and manufacturing of high performance gyroplanes and gyrodynes using highly advanced technology and modern aerospace science, engineering, and design methods. Groen Brothers Aviation was founded in 1986 by David Groen and his brother the late Jay Groen and is the predecessor to Groen Aeronautics Corporation.  GAC is now the owner of the successfully developed innovative technologies that have brought sustained autorotative flight into the modern age.

In December 2012, the new Private Company Groen Aeronautics Corporation registered in Delaware and subsequently acquired all the assets of the Public Company Groen Brothers Aviation, Inc., notably the highly advanced sustained autorotative flight technologies that had been developed over a quarter century.  This acquisition was accomplished in a transaction equal to more than $210 million.  GAC, continuing the tradition of Groen Brothers Aviation, is engaged in the commercialization of these technologies.  Groen Brothers Aviation Inc. retains a minority share holding in Groen Aeronautics Corporation.


Hawk 4 Gyroplane pic 1 (2)