BRM P61
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| Category | Formula One | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Constructor | British Racing Motors | ||||||||
| Designer(s) | Tony Rudd | ||||||||
| Predecessor | P57 | ||||||||
| Successor | P261 | ||||||||
| Technical specifications | |||||||||
| Chassis | semi-monocoque | ||||||||
| Suspension (front) | Double wishbone, outboard spring/damper. | ||||||||
| Suspension (rear) | de Dion tube, with double wishbones, coil springs over dampers, anti-roll bar | ||||||||
| Engine | BRM 56 1498cc V8 naturally aspirated Mid-engined, longitudinally mounted | ||||||||
| Transmission | BRM 6 speed manual ZF differential | ||||||||
| Tyres | Dunlop | ||||||||
| Competition history | |||||||||
| Notable entrants | Owen Racing Organization | ||||||||
| Notable drivers |  Graham Hill | ||||||||
| Debut | 1963 French Grand Prix | ||||||||
| |||||||||
| Constructors' Championships | 0 | ||||||||
| Drivers' Championships | 0 | ||||||||
The BRM P61 was a Formula One racing car built for the 1963 Formula One season. It was BRM's first attempt at the monocoque design introduced by Lotus a year earlier. Fundamental design issues would mean the car only competed 2 Grands Prix before being garaged in favor of the older, more reliable spaceframe P57. A redesigned monocoque car, dubbed the P261, was introduced for 1964.
After the success of Jim Clark and his Lotus 25 in 1962, BRM began work on their own monocoque car. The P61 was not a true monocoque, a rear subframe was bolted to the front, monocoque half of the car. The subframe housed BRM's type 56 engine, a 1.5 litre V8 and a Colotti gearbox. With approximately 200 horsepower, BRM's V8 rivaled Ferrari for the most powerful engine in F1. BRM's designers, confident in their chassis' rigidity, omitted a rear bulkhead between the driver and engine.