1926 Sunbeam 1000 HP Mystery or "The Slug"

The Sunbeam 1000 HP Mystery, also known as "The Slug," stands as an iconic land speed record-breaking car crafted by the Sunbeam car company of Wolverhampton. Propelled by two aircraft engines, it achieved the remarkable feat of becoming the first car to surpass the 200 mph threshold. Today, this legendary vehicle is showcased at the National Motor Museum, Beaulieu, immortalizing its historic achievements.

Engineered by Captain Jack Irving, the car was a testament to innovative design and engineering prowess. It featured a unique configuration with one engine positioned ahead of the driver and another behind. The engines, Sunbeam Matabele 22.4 liter aircraft engines, were repurposed from a powerboat. Despite its moniker "1000 HP," the actual power output hovered around 900 hp. The car's synchronization process involved starting the rear engine first via compressed air, followed by engaging the front engine through a mechanical friction clutch. Once synchronized, they were locked together with a dog clutch in preparation for the record attempt.

Incorporating cutting-edge aerodynamics, the Sunbeam 1000 HP boasted all-enveloping bodywork, enhancing its performance capabilities. Specially-made tires capable of withstanding speeds of up to 200 mph were fitted, although they were rated for only 3½ minutes at such velocities. However, one primitive feature remained in the form of a pair of chains driving the final axle, a design element that came under scrutiny following a high-speed incident involving another vehicle.

On March 29, 1927, Henry Segrave piloted the Sunbeam 1000 HP on Daytona Beach, setting a new land speed record of 203.79 miles per hour (327.97 km/h). This historic achievement marked the first time an automobile had surpassed the 200 mph milestone, solidifying the car's place in automotive history.

Despite being a one-off creation produced in 1926, the Sunbeam 1000 HP Mystery continues to captivate enthusiasts and historians alike with its groundbreaking design, remarkable performance, and enduring legacy as a pioneer in the realm of land speed records.

Source & Images: National Motor Museum