BRAKE CONTROL SYSTEM MODIFICATION – AUGMENTOR WING JET STOL RESEARCH AIRPLANE (AWJSRA)

摘要

The braking system which existed on the Buffalo airplane prior to improvements described in this report was a stock de Havilland system except for tires, wheels, and brakes which were replaced in early 1972 with those used on the Boeing 727 airplane nose gear. The higher heat sink of the 727 brake was required for the many closely spaced landings which the airplane was expected to make.nTwo deficiencies were determined during evaluation of the above manual braking system. Pressure control with the existing metering valves was erratic and the stock 727 brake had much more torque capability than required for the 45,000 lb. Buffalo airplane. The primary modification which was made to correct the erratic pressure control problem was to replace the existing Bendix metering valves with the same metering-valves as used on the 727 airplane. The primary modifications which were made to correct the excessive brake torque problem were to deboost the hydraulic brake pressure and also reduce the torque capability of the brake.