Smoke generators in the nose of the X-29 aircraft were used to help researchers see the behavior of the air flowing over the aircraft.
EC91-491-07
Smoke generators in the nose of the X-29 aircraft were used to help researchers see the behavior of the air flowing over the aircraft. The smoke here is demonstrating forebody vortex flow. This mission was flown September 10, 1991, by NASA research pilot Rogers Smith.1991NASA Photo› X-29 Project Description