Su-7 Fitter ground-attack fighter

The Su-7 Fitter is a ground-attack fighter that served in large numbers in the Soviet air force and those of many other countries. It was supplanted in most services by the Su-17 Fitter-C series, its variable-sweep wing descendant, also known as a "swing wing."

The Fitter's thick (8 percent thickness-chord), mid-mounted wing has a severe, 62-degree sweep along the leading edge and only a slightly lower sweep angle on the trailing edge. One wing fence extends back from the middle...