High intensity lights can be used for photography, filming or video needs. Direct observation can be done from Room 300 which is elevated on the east side of the test section. Exhaust fans are located in the ceiling for expulsion of exhaust gases. Blow-out doors are also located in the north end of the circuit for rapid purging of the circuit. The motors are mounted with rotor shafts centered within the exit cone passages.
Rotational speed is varied by a solid state control system.
The motors and supporting structure are enclosed in fairings to minimize resistance to air flow. The control panel for monitoring RPM is located in the control room, and includes a trim control to synchronize the two motors. Control Room - Located on the north wall of the test section, the control room contains the controls for the drive motors, survey carriage, data systems, compressed air, and full scale model support. Multiple video feeds allow the viewing of the groundboard, test vehicle and fans. The included angle between the sides of each passage is approximately 6 degrees.