The Challenger 600 was originally designed by the same developer of the Learjets, Bill Lear, and named the LearStar 600. After selling execlusive rights of the design, the LearStar 600 became known as the Challenger 600. This heavy jet accommodates ten passengers and has a full lavatory. Able to reach speeds of 484 mph, the Challenger 600 has a range of 3,910 miles. The interior dimensions are just as impressive; 6.1H x 8.2W x 28.2L (in feet). The Challenger 601 is an advanced version of the popular Challenger 600. The 601 has advanced safety and avionic systems with intercontinental range. Able to accommodate ten passengers and three crew members, the Challenger 601 can cruises at 540 mph and reaches a range of 3,790 miles. This aircraft is definitely relaxing and luxurious for business and leisure travel. Interior dimensions are 28.5L x 6.1H x 8.2W.