Accession Number : ADA186911

Title :   A Cost and Benefit Analysis of Hydraulic Fluid Systems for the Next Generation of Tactical Aircraft.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF SYSTEMS AND LOGISTICS

Personal Author(s) : Mahony, Michael P

PDF Url : ADA186911

Report Date : Sep 1987

Pagination or Media Count : 79

Abstract : This study analyzed the life cycle costs, cost of fires, and benefits of using a new nonflammable hydraulic fluid (CTFE) in future tactical aircraft versus a fire retardant fluid (Mil-H-83282) currently used in tactical aircraft. The study assumed that future hydraulic systems will use 8000 psi pressure. An analogy was made using a McDonnell Douglas Corporation study as the basis. This study compared Mil-H-83282 and CTFE at 8000 psi showing weight as the primary difference. Therefore, this weight difference, the fluid price difference, and the fuel consumption of an F-15 were used to determine the life cycle cost difference between the two systems. Since the added weight was slight, only the additional fuel consumption to fly the extra weight was significant. The added life cycle costs for using CTFE was estimated at $11.4 million in FY87 dollars. Since CTFE will prevent hydraulic fires, an estimate of Mil-H-83282 fire costs was attempted. The differences in the benefits were primarily in the survivability and capability of the aircraft. Taking these differences together CTFE is slightly better than Mil-H-83282 in peacetime. This difference becomes more pronounced in wartime. Finally, a sensitivity analysis was conducted on the assumptions. Based on these analyses, a conclusion was made that CTFE was a viable alternative at 8000 psi. However, further research is needed on the logistical problems related to the new pressure and fluid. Also, further study is needed on the effectiveness of Mil-H-83282 against the causes of hydraulic fires.

Descriptors :   *HYDRAULIC EQUIPMENT, *HYDRAULIC FLUIDS, *TACTICAL AIRCRAFT, *COST ANALYSIS, BENEFITS, FIRE RESISTANT MATERIALS, FIRES, FUEL CONSUMPTION, HYDRAULICS, LIFE CYCLE COSTS, PRESSURE, SURVIVABILITY, REDUNDANT COMPONENTS, FIGHTER AIRCRAFT, COST EFFECTIVENESS, FLAMMABILITY, OPERATIONAL READINESS, PERFORMANCE(ENGINEERING), CONTROL SURFACES, WEIGHT REDUCTION, THESES

Subject Categories : Lubricants and Hydraulic Fluids
      Attack and Fighter Aircraft
      Economics and Cost Analysis

Distribution Statement : APPROVED FOR PUBLIC RELEASE