In 1999, Bombardier introduced a new type, the Challenger 300, as part of the growing "super-midsize" private jet class. The Challenger 300 – and later Challenger 350, introduced in 2013 – competes with aircraft including the Cessna Citation X and Gulfstream G280. The Challenger 350 carries passengers 3,200 nautical miles non-stop at a cruise speed of Mach 0.80, and features the widest, purpose-built super midsize aircraft cabin with both a flat floor, and in-flight baggage access.
The forward wing sweep, 20,280 pounds (9.20 t) MOTW Hamburger Flugzeugbau HFB 320 Hansa Jet first flew on 21 April 1964, powered by two General Electric CJ610, 47 were built between 1965 and 1973. The joint Piaggo-Douglas, 18,000 pounds (8.2 t) MOTW Piaggio PD.808 first flew on 29 August 1964, powered by two Armstrong Siddeley Vipers, 24 were built for the Italian Air Force.