Coastdown testing is a proven method for determining the drag coefficients for road cars whilst the vehicle is in its normal operating environment. An accurate method of achieving this has been successfully developed at Loughborough University. This paper describes the adaptation and application of these techniques to the special case of a contemporary Formula One racing car. The work was undertaken in conjunction with the Benetton Formula One racing team.The paper outlines the development and application of a suitable mathematical model for this particular type of vehicle. The model includes the aerodynamic, tyre, drivetrain and the un-driven wheel drags and accounts for the change in aerodynamic drag due to ambient wind and changes in vehicle ride height during the coastdown. The test and analysis methods are described.The results from a series of coastdown tests conducted at a current Grand Prix circuit are presented and compared to the results from tyre rig and wind tunnel measurements.

Site-survey geophysical data collected prior to Leg 133 and underway geophysical data collected during Leg 133 were indispensable parts of the Ocean Drilling Program (ODP) drilling process off northeastern Australia. During 1987, BMR's vessel Rig Seismic collected 1400 km of multichannel, water-gun seismic reflection data and associated bathymetric, gravity, and magnetic data throughout the region to be drilled, and this formed the site-survey data set that was used to refine the scientific objectives and to select the final drill sites. During Leg 133, the JOIDES Resolution seismic crew collected 3222 nmi (5971 km) of underway geophysical data on transits to and between sites and over the sites themselves. These data were mainly bathymetric and magnetic data, but also included 154 nmi (285 km) of single-channel water-gun seismic reflection data over the sites to confirm their positions prior to drilling. Together, these data sets play an important part in our understanding of the regional significance of the drilling results.

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