When Max Biaggi set the ground speed record for electric bikes in the semi-aerodynamic category the Last year, Voxan’s Wattman used raw horsepower to make it happen – with 367 hp under pressure for an average of 228 mph. Now British company White Motorcycle Concepts plans to break this record using smart aerodynamics and a two-wheel drive transmission.
The company’s manufacture of carbon fiber and machined aluminum is the first demonstrator of a new aerodynamic concept, the brainchild of founder and namesake Robert White, an engineer with a quarter of a century of experience in the sport automobile.
He will also ride the bike in the record attempt, but his plans are much more ambitious than just going fast. He believes the same thinking that makes the WMC250EV 70% more aerodynamic than a Suzuki Hayabusa can be transferred to road bikes, running at reasonable speeds to deliver range, performance, and economy that will likely be particularly useful for motorcycles. electric.
The most obvious party part of the bike is the duct running from the nose – normally where the air pressure is greatest on a conventional bike – to the tail. In addition to reducing the frontal area of ââthe bike, a key part of aerodynamic drag, it lowers the center of pressure up front, so the airflow over 200 mph does not try to lift the wheel. front off the ground as much as on a conventional designed bicycle.
The design means there is more load on the front tire at high speeds, allowing White’s second innovation – 2wd – to come into play. Instead of relying solely on rear tire grip to overcome the Aerodynamic drag on the Bolivian salt marshes where the record attempt will be made, the WMC250EV uses both wheels. It adds traction, and when it comes to setting speed records on land, it’s as important as outright power.
The front wheel is driven by two hub-mounted motors. Two more drive the rear wheel, mounted in front of the swingarm, and transmit the drive via a closed chain drive. Initially, the bike used brushless motors from Hacker, a German company specializing in light and powerful motors for large rc airplanes.
The rear pair is 40 hp each, the front two are each good for 27 hp, making a total of 134 hp for the initial shape of the bike. This figure will increase as the record attempt gets closer. White believes the existing setup should be enough to raise the UK record north of 200 mph later this year, but wants to boost power to over 250 kW (335 hp) for world records next year, aiming for over 250 mph.
Although the WMC250EV is a pure record holder, White sees a future for both its 2WD system and the radical aerodynamics of production bikes. The conventional saddle height means that the channeled design could be used in a street bike, maintaining the high center of gravity needed for cornering as well as an actual riding position.
In addition, the 2WD system opens the door to an energy harvesting system that recharges the batteries while you brake, something that is lacking in current e-bikes that only power the rear wheel.
White Motorcycle Concepts WMC250EV explored:
- The truth of the hole Full-size CFD and wind tunnel tests confirm the bike’s drag is 70% less than that of a Suzuki Hayabusa thanks to the center duct – made of carbon fiber and supporting the rider’s seat and bars.
- Two-wheel drive A motor on either side of the specially designed Dymag front wheel drives it directly. Hacker’s motors have relatively low revs, eliminating the need for a reduction gear. HEL calipers and EBC brake discs are also installed.
- Cable steering A steering rod would block the aero intake, so the front wheel of the WMC250EV, mounted on a Bimota Tesi style front swingarm, is directed via flexible cables routed to either side of the duct.
- Sealed chain drive The rear motors drive a closed chain, which allows White to use fine oil, sprayed on the chain to lubricate and cool it during high-speed races, without it being thrown onto the wheel and the tire. White also sees the potential of the system on road bikes, with lower power losses and reduced maintenance compared to exposed chains.
- Battery in the chassis The entire lower part of the bike is machined aluminum, which is used to mount the lithium-ion batteries and form the main section of the bike’s structural frame.
White Motorcycle Concepts WMC250EV targets 250mph with radical low-drag design
First published on 23 Jun 2021 by Ben Purvis
A new British company from the motorsport heart of Northamptonshire has revealed the radical new machine to attempt the British and world electric land speed records over the next year.
Rob White, founder and driving force behind White Motorcycle Concepts, has been working on the WMC250EV for over two years, creating a revolutionary aerodynamic, two-wheel drive bike that has already managed to garner considerable funding and support.
The bike breaks with conventional speed record machines, which place the rider as low as possible for aerodynamic gains, sticking to a conventional saddle height but adding a large duct, dubbed “V-Air” which crosses the bike. Tests, both in simulators and in the MIRA wind tunnel, have shown that the design reduces wind resistance by 70% compared to the more aerodynamic production bikes.
It also reduces front lift, allowing the company to drive the front wheel as well as the rear to maximize traction, while a third innovation – called “F-Drive” – ââincludes a fully integrated chain drive. inside the swingarm which improves efficiency over a conventional design.
The name WMC250EV reflects the intention to go beyond 250 mph, breaking the 228 mph record set by Max Biaggi on the Voxan Wattman last year. Initially, the company is aiming for 200 mph and a UK record later this year using four electric motors – two powering the rear wheel and another pair in the front hub – with a total of 100 kW (134 hp). This power will then be increased for the world record attempt in Bolivia in 2022.
âIf you want to show the rest of the world that you’ve just invented a new aerodynamic concept that means you can go faster for a given horsepower, the best thing to do is go as fast as possible,â White explains. “That’s why we created the WMC250EV high speed demonstrator, the most radical version of this concept, to challenge the world speed record on land.”
He believes the same thinking can still provide significant benefits when toned down for road bikes, saying, âWhile this technology allows you to go faster, it also allows you to go much further for road bikes. the same amount of energy. direct and tangible benefit on the reduction of C02. “
The company’s next project, a 300cc three-wheeled scooter based on the Yamaha Tricity 300, illustrates the potential of the idea at the other end of the performance envelope, with a 25% drag reduction and adds a hybrid system to the existing combustion engine to offer 500cc performance and 50% less CO2 emissions.
Watch a video about Rob White and the project here:
White noise: the technological secrets of a daring British attempt to break the electric bike record
First published on Jun 16, 2021 by Ben Purvis
A new British challenger to the electric land speed record for motorcycles will be officially unveiled next week at Silverstone.
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Created by Northants-based White Motorcycle Concepts, the WMC250EV promises radical aero and electric drive solutions, using the ground speed record to prove their efficiency.
So far, the company has only revealed ripped-off glimpses of the machine, but is optimistic its ideas can translate into improved consumer electricity.
While the full reveal isn’t expected until June 23, White Motorcycle Concepts says the bike incorporates three key technologies, dubbed “V-Air,” “D-Drive,” and “F-Drive.”
They are intended to help him break the record for a semi-aerodynamic electric motorcycle, set at 366.94 km / h (228.05 mph) by Max Biaggi on the Voxan Wattman last October, but also to have applications beyond.
Founder and CEO Robert White – an engineer with 24 years of experience in the motorsport industry – will ride the bike and aim to set the UK speed record later this year and then the world record in 2022.
The âV-Airâ aerodynamic innovation is said to reduce drag by 69%. In the process, the system also increases downforce and stability, and although the speed recording machine is an extreme interpretation of the idea, White believes it can be integrated into mainstream machines at the to come up.
âD-Driveâ, the second piece of the puzzle, adds drive to the front wheel as well as the rear. By adding front-wheel drive, the door is also opened for efficient regenerative braking, something that has been absent from electric motorcycles until now because the front wheel – responsible for most of the braking – is usually not connected to the motor. transmission.
The third technology still secret, “F-Drive”, concerns the final transmission. White Motorcycle Concepts claims that it improves the efficiency of the final drive and could also be adapted to existing motorcycles.
White said, âThis is the culmination of two years of hard work and I’m very happy to finally be able to share these innovations that are truly disrupting the market. “
A second project, dubbed WMC300FR, is being developed around the company’s V-Air technology to demonstrate the feasibility of the idea at lower speeds on a city-oriented road machine, with the three-way scooter. Yamaha Tricity 300 wheels as a reference.