Helix has partnered with McMurtry Automotive to supply bespoke electric propulsion for the Spéirling Pure Electric Fan Hypercar. The UK-based motor manufacturer developed a rear-wheel drive system using two SPX242-94 electric motors. Together, these units deliver up to 1,000 hp. The system mates with McMurtry’s gearbox and works alongside the brand’s proprietary Downforce-on-Demand fan system.
Highlights
- Twin Helix SPX242-94 motors produce a combined 1,000 hp and 500 Nm of torque per unit, each weighing just 33 kg.
- Spéirling performance benchmarks include 0–60 mph in 1.5 seconds and a quarter-mile time of 8 seconds.
- Production deliveries of the McMurtry Spéirling PURE with Helix motors are set to begin in 2026.
- McMurtry Technology, a new division, now offers OEMs access to fan downforce systems, high-performance batteries, and e-axles.
Compact Packaging Enables New Design Possibilities
The SPX242-94 is among the most powerful motors Helix has produced. It was developed from the company’s scalable core technology range. Each unit delivers 500 Nm of torque in an ultra-lightweight 33 kg package. As a result, the motor’s compact form factor allows designers to make the most effective use of space. This is especially important within the Spéirling’s tight, single-seater configuration.
Record-Breaking Performance on Track
The Spéirling has already proven itself at several high-profile venues. It holds records at both the Goodwood Festival of Speed and the Laguna Seca Hill Climb. Additionally, it set the fastest-ever lap of the Top Gear test track. These achievements demonstrate the effectiveness of combining Helix propulsion with McMurtry’s aerodynamic downforce technology.
McMurtry Technology Opens Access for OEMs
Building on the Spéirling program’s success, McMurtry has launched a new division called McMurtry Technology. This unit offers other manufacturers access to proven systems for their own platforms. Available technologies include fan downforce systems designed to improve both performance and safety. In addition, OEMs can access high-performance battery modules and e-axle solutions originally developed for the Spéirling.
Helix Brings Motorsport Pedigree to Production EVs
Helix has deep roots in competitive motorsport. Its motors, inverters, and electric propulsion units are established components in Formula E and other racing series. Furthermore, the company’s technology powers hypercars such as the Aston Martin Valkyrie, Lotus Evija, and Czinger 21C.
In recent years, Helix has expanded beyond automotive applications. The company now plays a role in the electrification of aerospace, defense, and marine industries. Current and past partners span vertical take-off and landing vehicles, space launch providers, racing boats, and defense platforms across land, sea, and air.
Partnership Reflects Shared Engineering Vision
Simon Mead, Automotive Chief Engineer at Helix, emphasized the significance of the collaboration. He noted that the Spéirling represents an exceptional example of British engineering. Moreover, Helix propulsion systems have featured throughout the hypercar’s evolution, from prototype to production. Mead described the partnership as a reflection of both companies’ commitment to advancing next-generation propulsion systems.
For more information, visit ehelix.com.
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