Two opposing arms extending 15m beyond the central axle.
Shape: a Celtic-inspired, double-headed axe.
A gearing mechanism using three large identically sized gears connected by two smaller ones ensures that they turn at precisely the correct speed and remain correctly balanced.
Two diametrically opposed water-filled caissons, each with a capacity of 250m3 are fitted between the ends of the arms.
When the motor rotates the central axle, the arms swing and the small gears engage the central gear, which results in the smaller gears rotating at a higher speed than the wheel but in the same direction.
The large central gear is fitted loosely over the axle at its machine-room end and fixed in place prevent it from rotating.
Torsional Moment and Archimedes Principle
If M1 = M2 , and as their directions are reverse, M motor will be small.
It takes just 22.5 kw to power ten hydraulic motors, which consume just 1.5kwh (5.4 MJ) per half-turn, roughly the same as boiling eight kettles of water.