The Challenger 850 is a business aircraft developed from the Canadair Regional Jet series and its business aircraft derivative, the Corporate Jetliner. The RJ was designed with an stretched by 19 feet in length and augmenting the wingspan by 6 feet as compared to the Challenger series.
Better landing gear and steel brakes were added and other additions include: an all-glass cockpit, GE CF34-3B1 turbofans, making it more powerfull and fuel efficient than the -3A1 engines found on the RJ.
The additional weight of the fuel, which is 4,000 lbs, increases the takeoff weight as well as the range. The dimensions of the 850 are the same as the RJ, but the 850's cabin is usually configured to seat no more than 12 passengers in a more spacious executive arrangement.