The first F3 design had a spaceframe chassis and the suspension was heavily based on Brabham lines and several early cars used some Brabham components. Front suspension was double wishbones with outboard spring/dampers. Rear suspension was by top link and lower wishbone with twin radius rods, springs and dampers were again outboard. It was clothed in a distinctive looking wedge shaped body and although there were no wins the car was by no means disgraced.
Wheelbase: 92 ins.
Track: front 57 ins. rear 56 ins.
Wheels: 13 ins.
The MK3B was introduced for 1970 and featured revised suspension geometry. Quite a few cars were sold in Germany on the strength of the 1969 results, one win was recorded during the year, Gerold Pankol at Diepholz. Several other top six places were recorded notably by a young Niki Lauda. At the end of the year McNamara withdrew from F3.