초록 ▼

A modification of a 727 airplane, including a change in wing profile, to affect flight characteristics and the engines to lessen noise, such that the takeoff and landing procedure is modified so that engine power may be reduced, permitting the modified aircraft to meet the latest noise requirements

A modification of a 727 airplane, including a change in wing profile, to affect flight characteristics and the engines to lessen noise, such that the takeoff and landing procedure is modified so that engine power may be reduced, permitting the modified aircraft to meet the latest noise requirements without substantially reducing pay load.

대표청구항 ▼

[ What is claimed is:] [1.] A method of reducing takeoff drag and increasing altitude over a noise-monitoring station on a departure path for an aircraft, said aircraft having wings, each wing having slats, flaps and ailerons, said method comprising:a. modifying said wings of said aircraft, said mod

[ What is claimed is:] [1.] A method of reducing takeoff drag and increasing altitude over a noise-monitoring station on a departure path for an aircraft, said aircraft having wings, each wing having slats, flaps and ailerons, said method comprising:a. modifying said wings of said aircraft, said modification process comprising the steps of:1. removing an existing wing tip from an outboard end of each airplane wing;2. mounting a winglet to the outboard end of each wing;3. re-rigging said flaps and ailerons downwardly for each airplane wing; and4. re-rigging said slats on each airplane wing to a reduced deflection for take-off flat settings;b. re-calculating stall speeds for the modified wing;c. setting reduced flap deflections based upon said re-calculated stall speeds; andd. upon takeoff, flying a speed profile based upon said re-calculated stall speeds,whereby the re-calculated stall speeds for the modified wing are lower than the stall speeds for an unmodified wing, the lower stall speeds permit the same lift to be generated at a lesser flap deflection resulting in reduced drag during a take-off roll and a steeper climb angle resulting in greater altitude over said noise monitoring station on the departure path.