Williams FW04

Lore & Background

The FW04 was an evolution of the previous Williams FW chassis, which suffered from excessive bodyroll. The new car was considerably narrower and more streamlined, with radiators and fuel tanks repositioned for better aerodynamic performance and handling.

Fina were signed as major sponsors, with additional funds from a Swiss finance company, Ambrosium. Most significantly, Williams hired a young engineer named Patrick Head, who redesigned the car's overheating and fuel pick-up systems at short notice, greatly improving performance. He made modifications and renamed them the McGuire BM1.

Reader's Guide

The Williams FW04 holds a modest but significant place in Formula One history as the first car built entirely in-house by Frank Williams Racing Cars. Its design, by Ray Stokoe, addressed the handling deficiencies of the earlier FW chassis, and the car's narrow, streamlined shape represented a step forward for the team. The hiring of Patrick Head, who solved critical reliability issues, proved pivotal for the team's future. The car's legacy is thus twofold: it kept the team afloat during a difficult period and, in privateer hands, demonstrated the potential of the Williams name before the team's later success.