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Waw:: a practical sports car ::

Geplaatst 17 mrt. 2010 12:55 door Brecht Fietser   [ 29 jun. 2010 09:11 bijgewerkt ]

The WAW is a single person car that doesn't pollute the air, never needs a refill and is affordable for all. Or you could look at it this way: it's the world's fastest cycle in production, and carries you safely and comfortably as far as you want. Get some exercise and enjoy the cabriolet feel: the WAW is the ultimate sports car.

Rather than look for an alternative way of wasting disproportionate amounts of energy, we aim to develop a versatile and exciting vehicle that provides maximum freedom for minimal energy input. No green-washing for us, but a concrete healthy and durable mobility solution.

The quintessence of the WAW is energy efficiency. At a speed of 50 km/h (31mph) the WAW needs only 0.5 kWh per 100km: barely a fifth of a normal bicycle, and one fiftieth of n average fossil or electric car. Expressed in gasoline use, this corresponds to a mileage of 4700 miles per gallon (2000 km/l).

The extreme efficiency of this vehicle renders adding external energy redundant: the rider's own energy is sufficient. So it's essentially food- or biomass-driven. Serendipitously, burning fat is not considered a cost but a profit in our culture, so the WAW's fuel can be considered free or even a form of waste disposal. Hybrid propulsion optionally assists muscle power for those who can't or won't rely on their own power.

The key to its energy-efficiency is an unseen combination of optimized aerodynamics, weight, ergonomics and mechanical efficiency. The construction techniques of the WAW are unique worldwide: a self-carrying coachwork in an ultra-thin mixture of carbon and aramid fibre composites couples safety and comfort with minimal weight and air resistance.

Outstanding ergonomics and riding pleasure make long trips comfortable. In urbanized areas, the WAW is as fast as a fossil car: door to door speeds of 30 km/h (20 mph) are entirely possible. Mobility isn't a waste of time, money and energy any more, but an enjoyable workout. In good or bad weather, the WAW offers complete weather protection and ventilation, the convertible roof can even be stowed in the front or rear trunk.

The write-off and running cost of a WAW is so tiny it pays for itself if only by the economies in car fuel and maintenance cost. Commuters with a Cycle to Work allowance can earn a substantial salary raise by pedalling a WAW over distances that would be hard with a normal bicycle. Swapping the car - completely or partially - for a multimodal mix of a WAW and e.g. car sharing, public transport, folding bike makes you richer, healthier and free. Fitness and mental coaches, charging stations, limited radii of action, traffic jams, CO2 emissions... you can forget about those. It's cycling, but not as you know it.

The Waw is entirely hand crafted in Gent by the people of We hope you will be as fascinated by the future of mobility as we are.

Dries Callebaut ing. en Brecht Vandeputte arch.


WAW: 0.5 kWh/100km à 50 km/u (250W/50km/u)
Fossil car: 20 kWh/100km à 50 km/u  Bron
Electric car: 32.5 kWh/100km, (à 50km/h, with Li-ion battery 120Wh/kg, car without batteries 740 kg, frontal surface 0.8m², Rrolling 0.01, Motor efficiency 85%, distance stops 500m, brakingenergy recovery 50%, charging eff. 85%, primaire E > charging staion 40%)


250W          250 Wh        500 Wh          0.5 kWh

-------      =   -----------  =   -----------   =  ------------ =   0.5 kWh/100km

50 km/h       50 km          100 km           100 km


1 liter petrol= L = 10 kWh


     0.5 kWh . L               0.5 L

=   -------------------  =  -------------  =   1L / 2000 km = 0.05 L/100km

   10 kWh . 100km      1000 km


(3) Average distance per trip 2005, België: 13,1 km. Bron

(4) Commuting distance ca. 20km. Gemiddelde auto: 50 ct/km.