1990 December 17 - Martin Brundle test Brabham BT59Y-Yamaha OX99 V12 @ Silverstone South circuit

Описание: (From 1991 Yamaha Motor News No.1) On December 14 of last year (1990), the Brabham Yamaha Formula One Team, which will participate in the 1991 F1 World Championships, conducted the first test-runs of its "BT59Y" F1 machine, outfitted with the 12-cylinder V-configuration Yamaha OX99 engine, at the south track of Britain's Silverstone circuit. Over four ensuing days 670km of tests were conducted and abundant data gathered.
On the 14th, the Brabham Team's BT59Y, based ont he 1990 BT59 model chassis and outfitted with an OX99 engine, completed 20 laps of the circuit. On the 17th the same engine completed an additional 41 laps, after which a second engine was installed and tested over the planned distance of 500km on the 18th and 19th.
During the tests detailed data was gathered concerning electric systems, oil pressure systems, etc. Mark Blundell and Martin Brundle, who drove the machine during the tests, both liked the power feel of the OX99 engine and its good low end torque.
Early on in the tests there were some problems with accelerator action and traction coming out of low-speed corners. But work on settings gradually solved the problems and the machine developed very smooth acceleration. The team commented afterwards that they were very happy with the results of the test-runs.

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