Yamaha OX10C introduced

YAMAHA OX1OC

Yamaha Motor Co., Ltd. has recently completed the development of a new Formula One engine for use in the `95 season - the Yamaha OX1OC. The engine has been developed in accordance with the new 1995 FISA Formula One regulations. The engine has a V10 type cylinder configuration with a displacement of 3,000 cc that will be mounted in the new Tyrrell 023 chassis.

Due to the short time period between last year's new regulation announcement and the start of this year's season, Yamaha have made use of their existing technology in the field of high-performance engine development and production with a priority on creating an engine with outstanding reliability.

In order to keep the loss in power output, due to the reduced displacement, to an absolute minimum, Yamaha have taken last year's engine, the Yamaha OX1OB, as a base and further reduced the weight of moving parts like the pistons, connecting rods and crank assembly, to achieve higher rpm and thus maximise the power output. Redesigning components like the oil pump and water pump has also contributed to a decrease in power loss.

This year, competitiveness on the race track will depend more on the overall quality of the engine and chassis as a unified package than in previous years. In comparison to many of the newly formed teams who will compete in this year's championship, Tyrrell Yamaha has an advantage as they have now been working together for three years. This has meant a smooth transition in such areas as accommodating the new engine and control systems to the requirements of the newly developed chassis, and the whole team is working together to ensure the optimal match of engine and chassis qualities that will guarantee a fast, competitive machine.

Yamaha have taken such measures as further reducing friction in the OX1OC engine parts, and modifying the location of the injector, all with the aim of designing an engine that runs efficiently on less fuel.

As for measures aimed at achieving a higher level of engine reliability, Yamaha have set more meticulous and specified standards in the various aspects of the reliability control system.

Tests began on the new 3-litre engine incorporating all of the latest technologies in December and it has produced excellent results. Track testing of the OX1OC engine mounted in the new Tyrrell 023 chassis is planned to begin at Silverstone in mid-February.

The development of the new Yamaha OX1OC 3-litre engine has been carried out as a joint project of Yamaha Motor Co. and Britain's Engine Developments Limited.

MAIN SPECIFICATIONS; YAMAHA OX1OC

Cylinder configuration 72 Degree V10 Displacement 2,996 cc Rower Output Over 650 bhp Valve Mechanism DOHC Direct lifter type gear-driven cams Fuel Supply System Zytek Ignition System Zytek Dry Weight Less than 125 kg Dimensions: Length 625 mm Width 555 mm Height 417 mm

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