Rennmax

Bob Britton was one of Australia's leading builders in the late 1960s and early 1970s and was responsible for a series of highly competitive designs, most of which were based heavily on imported cars. Many of his most interesting cars stemmed from repair work, such as the successful series of Brabham BT23-based cars such as the Mildren, the Rorstan and the Rennmax BN3s.

The Rennmax story is a fascinating one but more information is needed. If you can help, please e-mail Allen at allen@oldracingcars.com.

Type Years Number built Notes
Rennmax-Cooper 1962 1 The rebuild of the Noel Hall Cooper T51 (F2-16-59) into a Lotus 18 chassis type car. According to John Blanden's 'Historic Racing Cars of Australia' it used the wheels, brakes, engine and gearbox from the Cooper.
Rennmax BN1 1962-1964? 6 or 7 A Lotus-based single-seater incorporating elements of the Lotus 20 and 22 designs. Full details.
Mildren-Maserati sports car 1965 1 Lotus 23 style with a 2.9-litre Maserati Type 61 engine built for Alec Mildren. This also used parts from a Cooper T51, apparently the ex-Mildren/Ross Dalton F2-22-59 in this case.
Rennmax Vee ? 7? A batch built for Greg Cusack and Bruce Burr
Lotus 23 replicas ? Unknown A series of cars that evolved out of Britton's Lotus 23 repairs
Rennmax BN2 1968 1 A one-off design for Max Stewart based on the Brabham BT14 design. Full details.
Rennmax BN3 1969-1970 5? A series of cars based on the Brabham BT23. The Rorstan and Mildren from 1969 were effectively the same construction. Full details.
BMW sports racers ? 2 BMW 2-litre engines
Repco sports racer ? 1 Built with a 5-litre Repco engine for Lionel Ayers
Rennmax Vee 2nd series ? Unknown This may have been the BN4 design.
Rennmax BN6 1974 1 Monocoque. Prototype of BN7. One built for Doug Heasman.
Rennmax BN7 1975 3 Monocoque. Three built for Terry Quartly, Andrew Miedecke and Ross Switzer.

Thanks to Ray Bell and Bryan Miller for their help constructing these histories. This page last updated on 5 May, 2008 .