Ball-Bartoe Jetwing

The Ball-Bartoe JW-1 Jetwing was a US research aircraft flown in the 1970s to investigate blown wing technology.

The upper surface of the swept wings incorporated a slot along 70% span, through which air from the engine's fan stage could be discharged.

Mounted above this slot was a small secondary airfoil called an "augmentor", intended to direct the discharged airflow over the wing.

With this arrangement, it was found that the aircraft remained controllable at airspeeds as low as 34.76 kn (64.38 km/h; 40.00 mph).

Ultimately, the Navy discontinued blown-wing research in favor of vectored thrust technology.

Augmentor detail
Augmentor detail