46 of68 Reducing Drag Training
  Wings that are too fat, too skinny, and just right.
We can reduce drag by making the aspect ratio higher and building a longer, skinnier wing. But a wing that's too long and skinny is hard to make! It has to be extra strong so it doesn't bend or break off. We have to make a trade-off between the cost of the wing, its strength, and its drag. Most planes have aspect ratios between 6 and 10.
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