Actually, there were 4 Draper Taper's on CN. The Dash 8-40CM's, the SD50F's, the SD0F's and the HR616's. The Bombardier HR616's were the first Draper Taper units, and are often refered to as just 'Draper Tapers'. These were also the last Alco-powered units ever made for freight service, in the...