The Beechcraft Model 18 (or "Twin Beech", as it is also known) is a 6- to 11-seat,[2] twin-engined, low-wing, tailwheel light aircraft manufactured by the Beech Aircraft Corporation of Wichita, Kansas (Wikipedia)

The Pratt & Whitney R-985 Wasp Junior engines.

Picture I took during the Open House 2005 at Pratt&Whitney in St-Hubert.