Method and apparatus for reducing airplane noise

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, said wings having 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;
• and
• 3. re-rigging said flaps and ailerons downwardly for each airplane wing;
• b. re-calculating stall speeds for the modified wing;
• c. setting reduced flap deflections based upon said re-calculated stall speeds;
• and
• d. 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.

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, said wings having slats, flaps and ailerons, said method comprising:

• a. modifying said wings of said aircraft, said modification process comprising the steps of:
• 1. re-rigging said flaps and ailerons downwardly for each airplane wing;
• and
• 2. re-rigging said slats on each airplane wing to a reduced deflection for take-off flap settings;
• b. re-calculating stall speeds for the modified wing;
• c. setting reduced flap deflections based upon said re-calculated stall speeds;
• and
• d. 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.

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, said wings having flaps and ailerons, said method comprising:

• a. modifying said wings of said aircraft, said modification process comprising the step of re-rigging said flaps and ailerons downwardly for each said aircraft wing;
• b. re-calculating stall speeds for the modified wing;
• c. setting reduced flap deflections based upon said re-calculated stall speeds;
• and
• d. 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.

An aircraft modification for 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 modification comprising a modified wing, said modified wing having:

• at least one winglet mounted on an outboard end of each wing;
• said flaps and ailerons re-rigged downwardly for each airplane wing;
• and
• said slats re-rigged to a reduced deflection for take-off settings;
• whereby lower stall speeds are re-calculated for the modified wing, take-off flap settings are reduced based upon said re-calculated stall speeds and a take-off speed profile based upon said re-calculated stall speeds is flown resulting in reduced drag during take-off roll and a steeper climb angle resulting in greater altitude over the noise monitoring station on the departure path.

An aircraft modification for 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 flaps and ailerons, said modification comprising a modified wing, said modified wing having:

• at least one winglet mounted on the outboard end of each wing;
• and said
• flaps and ailerons re-rigged downwardly for each wing;
• whereby lower stall speeds are re-calculated for the modified wing, take-off flap settings are reduced based upon said re-calculated stall speeds and a take-off speed profile based upon said re-calculated stall speeds is flown resulting in reduced drag during take-off roll and a steeper climb angle resulting in greater altitude over the noise monitoring station on the departure path.

An aircraft modification for 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 modification comprising a modified wing, said wing having:

• said flaps and ailerons re-rigged downwardly for each airplane wing;
• and
• said slats re-rigged to a reduced deflection for take-off settings;
• whereby lower stall speeds are re-calculated for the modified wing, take-off flap settings are reduced based upon said re-calculated stall speeds and a take-off speed profile based upon said re-calculated stall speeds is flown resulting in reduced drag during take-off roll and a steeper climb angle resulting in greater altitude over the noise monitoring station on the departure path.