Zenair Marks 40th Year in 2014 One of North America's leading manufacturers of recreational aircraft kits is turning 40 this year. Zenair Limited was founded by Chris Heintz in his 2-car garage in 1974; the company moved to its current 15,000 square foot facilities on the Huronia Airport (Ontario, Canada) over 30 years ago.   Now directed by the founder's sons, the family-owned business (togethe…