There's no airplane quite like the Grumman X-29. Its astonishing forward-swept wings were just one of its many bold innovations.
원문출처 : https://www.cnn.com/style/article/grumman-x-29-nasa-darpa-fighter-plane/index.html
원문출처 : https://www.cnn.com/style/article/grumman-x-29-nasa-darpa-fighter-plane/index.html