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Delta wing
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===Structure=== The long root chord of the delta wing and minimal area outboard make it structurally efficient. It can be built stronger, stiffer and at the same time lighter than a [[swept wing]] of equivalent [[aspect ratio]] and lifting capability. Because of this it is easy and relatively inexpensive to buildโa substantial factor in the success of the [[Mikoyan-Gurevich MiG-21|MiG-21]] and [[Dassault Mirage|Mirage]] aircraft series.<ref>{{Cite book |last1=Sahoo |first1=Devabrata |url=https://books.google.com/books?id=TYshEQAAQBAJ&dq=%C2%A0simplicity+delta+wing+stronger+stiffer&pg=PA50 |title=Advances in Aerospace Technologies |last2=Sharma |first2=Abhishek |last3=Rajput |first3=Shailendra |date=2024-10-23 |publisher=CRC Press |isbn=978-87-7004-638-1 |pages=50 |language=en}}</ref> Its long root chord also allows a deeper structure for a given [[aerofoil]] section. This both enhances its weight-saving characteristic and provides greater internal volume for fuel and other items, without a significant increase in drag. However, on supersonic designs the opportunity is often taken to use a thinner aerofoil instead, in order to actually reduce drag.
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