Why doesn't the world's fastest commercial aircraft have winglets?

The Boeing 747-8's innovative raked wingtips offer a sleek, integrated solution to reduce induced drag.
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Europe Clears Fastest Civilian Aircraft Since the Concorde to Fly in the Continent’s Sky

The rather short-lived Concorde has set the standard for speed when it comes to civilian aircraft. With a maximum cruise speed of Mach 2.04 (1,350 mph/2,179 kph) at an altitude of 60,000 feet (18,288 ...
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What Is The Fastest Aircraft Ever Built?

A Cessna 172 can typically cruise at around 140 mph (225 kph). Most commercial airliners fly fast enough at altitude that speed is measured in how close the aircraft's speed is to the speed of sound.
Morningstar

Hermeus Flies Newest Supersonic Plane, Delivering Its Second Successful First Flight in Nine Months

The company's largest and fastest vehicle to date, Quarterhorse Mk 2.1 brings Hermeus one step closer to building the world's fastest aircraft. TRUTH OR CONSEQUENCES, N.M., March 2, 2026 /PRNewswire/ ...