General Dynamics–Boeing AFTI/F-111A Aardvark

The General Dynamics–Boeing AFTI/F-111A Aardvark is a research aircraft modified from a General Dynamics F-111 Aardvark to test a Boeing-built supercritical mission adaptive wing (MAW). This MAW, in contrast to standard control surfaces, could smoothly change the shape of its airfoil in flight.

Source: Wikipedia — General Dynamics–Boeing AFTI/F-111A Aardvark (CC BY-SA 4.0)