Winglets and now Sharklets!

The question is.What are this for!are they really necessary since not all planes have them?

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How?a brief explanation please

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I think they reduce drag or something which helps with fuel efficiency

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The sharklets reduce drag that’s the main reason therefore the aircraft is more efficient as its saving in fuel its just like a Ferrari it needs to be aerodynamic to be fast but in a planes case to be fuel efficient

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Good explanation but if this is so…why not add them to all planes or is there any limitation

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Any new plane has them, or some sort of device that does the same thing. The older aircraft are often not retrofitted because the cost savings does not make good sense for the time they expect to keep the aircraft.

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Sharklets are a type of winglet, they aren’t different things

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The 737 classics, as well as the 757/767 all had winglets designed/certified years after they entered service.

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Is this what the 787 has?or 748

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As much as they all serve the same purpose is there any that is the better choice…raked tips or winglets

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Thanks that solved it all

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