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SAE J2521 noise tests are conducted to examine the impact of shim and grease on brake squeal generation. The impact of adhesive (bonded) shim, clip-on shim and grease for noise generation are examined. Low frequency squeal is eliminated by the application of grease on both adhesive (bonded) shims and clip-on shims. The role of shim and grease for reducing brake squeal is discussed. Adhesive (bonded) shims were found to be effective for high frequency squeal (pad bending mode) by increasing damping. Grease is effective for low frequency squeal (pad rigid mode). The mechanism to eliminate low frequency squeal by the application of grease is investigated. Friction between the shim and caliper piston/finger is reduced. Pads contact directly to the anchor bracket. As a result the contact stiffness is increased. The mechanism is confirmed by experiments.

The Synthetic Vision System (SVS) is planned to be applied to provide cockpit forward view in the next generation Supersonic Transport (SST). Operational requirements for the SST landing system were examined and the necessity of the SVS was verified. Next, the SVS concept was evaluated by operational users. Following that, the method to improve the pilot's situation awareness, the requirements, and the device types for the SST cockpit display system were studied. Based on the results of these studies, proposed cockpit display arrangements with the contents were implemented. At last, issues to develop the system are identified.