Aerodynamics Essay

1780 WordsAug 23, 20128 Pages
Unique Characteristics of the Bombardier Challenger CL-600 Mark E Welch Liberty University Aerodynamics AVIA 305-D01 Professor Cox August 4, 2012 ABSTRACT The Canadair Challenger began as a project for an advanced-technology bizjet by William Lear, developer of the Learjet. It was then called the Lear Star 600 (LEAR, WP). Canadair Limited purchased the production rights from Lear, renamed the aircraft the Challenger and began production of the prototype in 1976. Powered by two high-bypass turbofan engines, each produces 9,000 pounds of thrust, giving the 53,000-pound aircraft the highest thrust for its weight of any bizjet. These innovations allowed this aircraft to takeoff quicker, climb faster, fly farther and have better fuel efficiency than any aircraft in its class. Today we will discuss some of the features unique to this aircraft that make it a wonderful platform to fly. The Challenger was the first production aircraft to use supercritical wings. This airfoil, considered unconventional when tested in the early 1970s by NASA at the Dryden Flight Research Center, is now universally recognized by the aviation industry as a wing design that increases flying efficiency and helps lower fuel costs. When an aircraft with a conventional wing nears a speed of sound (Mach 1), air flowing across the top of the wing moves faster and becomes supersonic. This creates a shock wave on the wing's upper surface even though the aircraft, as a whole, has not exceeded Mach 1. The aircraft, at this point, is flying at what is called the critical speed. The shockwave causes the smooth flow of air hugging the wing's upper surface (the boundary layer) to separate from the wing and create turbulence. Separated boundary layers are like wakes behind a boat -- the air is unsteady and churning, and drag increases. This increases fuel consumption and it can also lead to a

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