Generally all the weight of the fusaage has to go through the wings anyway so it is structurally more efficient to put weight on the wings in the first place.

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Barbing 4 hours ago | parent [-]

And they do that with fuel?! Neat!

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dghlsakjg 3 hours ago | parent [-]

Yup.

On a 737 they can put about 8k pounds per wing.

Even little planes like Cessnas have wing tanks.

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Barbing an hour ago | parent [-]

Wow wow!

Might see planes just a smidge differently now :)

	▲	brucehoult a minute ago \| parent [-]
		In sailplanes we add up to around 200 litres of water to wing tanks in single-seat gliders (empty weight typically around 280kg) to improve the high speed performance (typically up to 270 km/h these days) and ability to fly comfortably in turbulence. It's surprising what you can fly formation with, even without an engine [1] :-) https://www.youtube.com/watch?v=G0icOICQLTc Dumping (most of the) water before landing: https://www.youtube.com/watch?v=I4Yv-V7eozk [1] this particular glider does have a small engine for takeoff, but maximum speed with the engine extended is 180 km/h and here they are flying at 280 km/h.