Other NASA Facilities:

For wind tunnels, ArcSine has performed fieldwork, analysis, and design on power distribution systems up to 115,000 volts and 100 MVA. The firm is also skilled at the design of programmable and hardwired control and safety systems. Selected examples follow.

• 40x80- and 80x120-Foot Wind Tunnels

Field evaluation and design of modifications to model support at 40x80 Foot Wind Tunnel. Detailed design of model support for 80x120-Foot Wind Tunnel. Analysis and report of drive system sequencing and controls for 40x80-Foot Wind Tunnel. Analysis and testing of fan motor fields at 40x80-Foot Wind Tunnel. Preparation and execution of sequence test procedure for safety logic protecting IFC’s and fan drive motors. Analysis, design, installation, and startup assistance of reduced voltage start system for the A1 machine of the IFC.

• Unitary Plan Wind Tunnel

Complete design of the hardwired safety system for the main drive (228,000 hp) and auxiliaries equipment during facility rehabilitation.

Assistance with Unitary auxiliary system modification, including inspection during removal and reinstallation of the Unitary drive motors (four at 57,000 hp) for rewinding. Troubleshooting of wiring problems associated with interfacing new and existing equipment. Preparation and execution of safety test procedures and safety review of design modifications to the hardwired safety system.

• 14-Foot Wind Tunnel

Assisted Code DQ with investigation of 6.9-kV circuit breaker mishap at the 14-Foot Wind Tunnel.  Design, installation, and startup of replacement dc loop contactor and loop cabling rated 1,000 volts, 2,000 amps.

• 12-Foot Pressurized Wind Tunnel

Trouble calls and design modifications for laser seeder project.

• 7x10-Foot Wind Tunnel

Design and startup of control system, including programmable logic controller, for 3,000-psi air system.  Designed and installed upgrade to 150MZ MG set, DC loop cabling and contactor.  Performed study into circuit breaker incident investigation.