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I'm doing 150Wh/mi with my Twizy, considering that the C1 will have better aero and rolling resistance, I would say they might get to 120Wh/mi maybe 100. which translate into 70/80 mi maximum with a 8kWh pack.
Maybe they will make the two gyroscopes do double duty and use them as flywheels for short term regen energy storage, too.
I think that such a large range it's due to the 2 gyroscopes acting to generate energy to be stored in the battery.
@Jerry
Of course gyroscopes use energy, but the continuous movements of the masses inside the giroscopes could also be used to generate energy this way. Put a solenoid around the moving masses inside the gyroscopes and couple it to an electromagnetic field. Then you will have an induced current inside the solenoid that can generate energy to charge up the battery.
Before the perpetual motion jokes come in, obviously you will never get back out as much energy in the gyroscopes as you put in. Could they be a more efficient regen than charging the battery?