Load Alleviation Function is accomplished by deflecting spoilers 4&5, and the ailerons, on both wings.
Capt Saleem Zaheer, Chief Pilot – Flight Operations at Indigo Airlines, sent out a mail to all Indigo flight crew describing his flight experience of the first flight of the A320 equipped sharklet, VT-IFH. Capt Saleem, and his senior first officer, flew the aircraft on the DEL-MAA-CJB-DEL pattern (Delhi – Chennai – Coimbatore-Delhi).
In course of their flight, the flight crew noticed no difference between the handling qualities of the sharklet-equipped A320, and their fleet of non-sharklet equipped A320s. The crew however noted the movement of ailerons and outboard spoilers when flying through turbulence, which is in accordance with a design by Airbus known as the Load Alleviation Function (LAF). The higher bending loads experienced by an A320 wing equipped with Sharklets, especially under conditions of rapidly fluctuating lift (when flying through turbulence), need to be alleviated. To accomplish this, the outboard spoilers (Numbers 4 & 5 on both wings) and the wing ailerons are deflected in accordance with the fall or rise in life.
VT-IFI landed in Delhi yesterday, and is the second Sharklet equipped A320 to join Indigo’s fleet.
Below is a video of VT-IFI’s first flight ever, which was on the 25th of January, 2013, at Hamburg, Germany.
Indigo just became India’s first airline to operate a sharklet-equipped A320, with its VT-IFH registered Airbus A320 that it took delivery of, on 28th January, 2013. VT-IFH bears manufacturer serial number (MSN) 5437, and first took to the skies on the 15th of January, 2013, and herald a new chapter for Indigo with an operationally more economical airplane, that has the potential of saving the airline in excess of US$400,000 per year, per aircraft.
All future A320 aircraft to be delivered to IndiGo shall be fitted with the Sharklet wing tip devices.
This aircraft will be the 75th A320 that the airline has taken delivery of. Of the 75, 14 no longer fly for Indigo. Indigo sells every aircraft that it takes deliver of, leasing the airplane back from the lessor. The lease period is typically for six years: sufficient time for Indigo to make the most of a new airplane’s reliability and performance, while avoiding an expensive “D” check. Those that flew for Indigo, for the first six years of their life, now fly for Ethiad, SAS, BH Air, Myanmar Airways International, Kibris Turk Hava Yollari Charters, and Turkish Airlines.
MSN 5460 is the next sharklet equipped A320 slated to join the Indigo fleet as VT-IFI, while VT-INK will be the next A320 to leave the Indigo fleet.
Go Air will be the next Indian airline to receive Airbus A320 aircraft fitted with sharklets.
Air Asia recently received the world’s first “Sharklet”-equipped A320 for commercial operations. Indigo and Go air will very soon have VT-IFH and VT-GOL flying in the Indian skies; both equipped with “sharklets”. Ever wanted to know more about these “Sharklets” that are grabbing headlines today?
Here is a comprehensive article on Winglets, or what Airbus prefers to call them: “Sharklets”, which are “Hunting down fuel burn“.