Sukhoi considers winglets for Superjet 100 variants

Moscow
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Sukhoi is considering installing winglets as an option for long-range and business variants of the baseline Superjet 100.

The airframer's civil division has already validated the new wing design in subsonic wind-tunnel tests.

Referring to test results, deputy chief designer for aerodynamics Alexander Dolotovsky says that installing blended winglets could lead to a 3% lower fuel burn.

"We also expect them to enhance [Superjet's] aerodynamic characteristics during takeoffs and landings as well as to increase the rate-of-climb," he adds.

"These improvements should contribute to ensuring aircraft operability in very hot and high terrain conditions."

Sukhoi has tentatively opted for the upward-angled winglets. "They are easier for installation on the wing. We also want to have an opportunity to do it as a retrofit for existing aircraft,"explains Dolotovsky.

He says Sukhoi's assembly plant KnAAPO will be able to start fitting new Superjet models with winglets by the end of this year.

Earlier this month the airframer launched a four-month testing campaign for the longer-range Superjet 100.