Evaluation of a Pressurized Air Start System for Advanced Army Helicopters.
Final technical rept.,
AIRESEARCH MFG CO OF ARIZONA PHOENIX
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This report presents the results of an evaluation of a pressurized air start system PASS for advanced Army helicopters. PASS is a new concept for starting gas turbine propulsion engines that currently use electric starters in conjunction with nickel-cadmium batteries. PASS is a stored energy start system using air as the working fluid. In addition to starting the engine by pressurized air, the engine can be started using pneumatic ground carts or bleed air from another engine. The study included a design evaluation of a PASS for both single- and twin-engine helicopters. In addition, a comparison of a PASS and an equivalent electric start system was made on the basis of performance, weight, reliability, maintainability, vulnerability, and life-cycle cost. The logistics of operating the PASS using current and planned ground support equipment was studied. The results of the comparison indicated that PASS offers the following improvements over electric starting Engine start times can be reduced significantly System weight is lower Maintenance requirements can be reduced Reliability is improved significantly and Life-cycle cost can be reduced 30 to 40 percent. Author
- Hydraulic and Pneumatic Equipment
- Jet and Gas Turbine Engines