What we have here is our Rotax Twin Cylinder motorcycle engine. Here are the twin hydrogen injectors.

Hydrogen is actually fed into the injectors in much the same manner as fuel is fed into a standard fuel injected engine.

We run a chain drive through a differential at the back here. A lot of the technologies that are very similar to what you would find in your standard vehicle. 

We've got a car differential, drive shaft, etc. This here is our hydrogen storage tank.

Now this tank stores approximately one kilogram of hydrogen, which has a similar energy level to about three to four litres of petrol. The hydrogen's a very sparse gas, so we need to compress it significantly to get a good amount of energy into a confined space.

This particular tank is pressurised to two hundred bar, which is two hundred times atmospheric pressure. Now the hydrogen comes out of the tank at this end and then runs through the series of pressure reducers and check valves to reduce the pressure of the hydrogen.

By the time the hydrogen reaches the engine, it's at about five times atmospheric pressure.

On the way we have a number of safety valves, such that if there is anything unfortunate

Happens, for instance there's an accident and some of the valves or the other piping becomes dislodged, there’s automatic safety shut off, the hydrogen is actually shut off at the tank and this reduces the danger of any explosion.