UK aerostructures company GKN Aerospace has delivered the first set of winglets for the Bombardier CSeries twinjet.
The company says the winglets are for the first production aircraft and follow a three-year design and manufacturing effort to minimise the structures' weight.
GKN says the winglets will "make an important contribution" to cutting fuel-burn and increasing range on the aircraft, which will be powered by Pratt & Whitney PW1500G geared-fan engines.
"We are commencing now a production programme that will continue beyond the end of the first quarter of this century," says GKN Aerospace's Europe and Special Products Group chief Phil Swash.
Bombardier is intending to conduct the first flight of the CSeries during the first half of this year and deliver the initial aircraft in 2014.