The test facility is organized around an "infrastructure" consisting of baseplates, vehicle locating fixtures, scales, hydraulic and pneumatic power sources, interchangeable valve assemblies and actuators, and transducers. These are organized along with specialized devices into the several forms required for the different tests.
When not in use, Topsy can be disassembled and stored on shelves and in cabinets.
The report "Topsy - A Modular Chassis Parameter Measurement System", available here in Adobe Acrobat PDF format, describes the overall system and the methodology, components, and instrumentation used in the various measurements.
The report is based on SAE Paper 971056, “Topsy - A Modular Chassis Parameter Measurement System”, which was also selected for inclusion in the SAE Transactions for 1997.
This page last modified 10/23/00