Pilot Rich Brown of Orwell made the maiden flight of a home built Hatz biplane at the Rutland Southern Vermont Regional Airport last week. It took Brown nearly 10 years to build it part time. The plane is constructed of steel tubing, wooden-framed wings and synthetic fabric. Power is provided by a Lycoming engine. Brown is a member of the Experimental Aircraft Association's Green Mt. Flyers Chapter 968 based at the airport.