Why are 737 wing tips bent?

Winglets are a proven way to reduce drag, save fuel, cut carbon dioxide and nitrogen oxide emissions, and reduce community noise. This helps the operating airlines save money by decreasing the amount of fuel consumed, as well as landing charges at airports.

Why are some wing tips bent up?

Winglets copy the upward curl of the feathers to help planes fly efficiently and also to keep the length of the wings within limits set by airports - particularly handy with very large planes such an A380 jumbo jet.

Why do Jets have bent wing tips?

The primary purpose of attaching wingtips to a plane is to cut down on operating costs. Wingtips reduce vortex drag caused by the convergence of high-pressure and low-pressure air at the tip of its wings. As vortices form at the wing's edge, they create a drag force that significantly slows the aircraft down.

Why is the top of an airplane wing curved?

Airplanes' wings are curved on top and flatter on the bottom. That shape makes air flow over the top faster than under the bottom. As a result, less air pressure is on top of the wing. This lower pressure makes the wing, and the airplane it's attached to, move up.

Why does Boeing 777 have no winglets?

Why does the 777 not have winglets? One reason that the 777 does not feature such wingtip extensions is the operational limits these would place on the aircraft. The 777-200LR and -300ER variants of the aircraft have a wingspan of 64.8 meters. This only just falls below the upper limit for the ICAO's aerodrome code E.

Winglets - How Do They Work? (Feat. Wendover Productions)

Why do all Boeing's start with 7?

So, to sum up, Why do Boeing models start with a 7? The engineering division dedicated the number 700 to jet-engined aircraft. Boeing's marketing division realized that the name 700 for their first jet aircraft would sound boring, so they suggested the name to be the 707, which had quite a nice ring to it.

How much is a 737 winglet?

Winglets cost anywhere from $500,000 for a 737 to more than $2 million for bigger planes. But the payoff can be rapid. Southwest Airlines estimates that it saves 54 million gallons of fuel every year thanks to equipping 93 percent of its fleet of 737s with winglets.

Why do modern aircraft have upturned wingtips?

Winglets allow the wings to be more efficient at creating lift, which means planes require less power from the engines. That results in greater fuel economy, lower CO2 emissions, and lower costs for airlines.

Why don't planes fly in a straight line?

The reason for this is that the earth revolves on its axis, forcing the middle to bulge out slightly. The curvature of the earth and its extra equatorial width mean that curving towards the poles is a shorter distance than flying in a straight line.

Why can planes fly upside down?

That causes air over the top to flow more quickly than underneath. The difference in pressure gives the wing lift, forcing it upwards. Upside down, that effect would reverse, but the pilot could still achieve lift by altering the angle of attack, in other words by pointing the plane's nose skyward.

Why does the 737 have winglets?

The winglets, which curve out and up from the plane's wing tips, improve an airplane's performance and allow it to fly more than 185km farther than a 737-300 without winglets. Winglets also offer excellent environmental benefits, including reduced fuel use, takeoff and landing noise, and in-flight engine emissions.

Why does the Dreamliner not have winglets?

What makes the Boeing 787 Dreamliner so different is that it does not have winglets because it was a clean sheet design. Unlike some older aircraft with winglets added to them in the early 1990s, the Boeing 787 was a revolutionary design built using many new materials and modern technologies.

Do winglets increase lift?

Winglets, which are airfoils operating just like a sailboat tacking upwind, produce a forward thrust inside the circulation field of the vortices and reduce their strength. Weaker vortices mean less drag at the wingtips and lift is restored.

What is the difference between winglets and Sharklets?

Winglets, as they're called, have been fitted to airliners since the '80s, but Airbus has come up with a new name for them: “sharklets.” It's part of an effort to escape a patent on the increasingly important technology that's held by a close partner of Airbus's main rival, Boeing.

Are airplane wings supposed to bend?

The wing is a lot like the rubber band in that the oscillation is damped and doesn't continue for a long time. This is the way you want it. So, yes—the wings bend and yes, they are supposed to do that.

Do winglets reduce turbulence?

Winglets reduce wake turbulence thus minimizing its potential effect on following aircraft. Winglets come in different shapes and sizes with each type performing the same basic drag-reducing function. They have proven to be very effective even when retrofitted to aircraft originally designed in the 1960s.

Why do planes not fly over the Pacific Ocean?

Most flights are planned to minimize the time spent over bodies of water, since storms are more likely to occur over water than land. The weather over the Pacific Ocean is often turbulent, and there are many thunderstorms in parts of the Pacific, so it's not a safe environment to fly a plane.

Why do planes not fly over Antarctica?

No, planes don't fly over Antarctica because it is too remote and ETOPS regulation requires that aircraft are within a certain distance of a diversion airport at all times in case there are engine problems. As there are no diversion airports in Antarctica, routes must stay closer to other continents.

What is a raked wingtip?

Raked wingtips, where the tip has a greater wing sweep than the rest of the wing, are featured on some Boeing Commercial Airplanes to improve fuel efficiency, takeoff and climb performance. Like winglets, they increase the effective wing aspect ratio and diminish wingtip vortices, decreasing lift-induced drag.

Why do some planes have winglets and some don t?

Aircraft manufacturers have been using additional 'bits' on the ends of wings since the beginning of the 2000s. These small additions, commonly known as winglets, are designed to improve the efficiency of the aircraft by reducing drag.

Why are elliptical wings better?

An elliptical planform is the most efficient aerodynamic shape for an untwisted wing, leading to the lowest amount of induced drag.

Do winglets make a plane faster?

Winglets are a proven way to reduce aircraft drag, save fuel, cut carbon dioxide and nitrogen oxide emissions, and reduce noise. They increase range and enable a faster rate of climb.

Why are there double winglets?

How the split winglets work. Winglets are added to the end of a plane's wings to reduce drag and ultimately enable more efficient flight. They work by reducing a process known as vortex drag, caused by different air pressures converging at the tips of each wing and slowing the aircraft down.

Who created the winglets?

In the United States, Scottish-born engineer William E. Somerville patented the first functional winglets in 1910. Somerville installed the devices on his early biplane and monoplane designs. Vincent Burnelli received US Patent no: 1,774,474 for his "Airfoil Control Means" on August 26, 1930.