Where else in the world can you take your personal vehicle onto a professional racetrack circuit? When the Mount Panorama Racetrack Circuit is not being used for motor racing, it forms a public road, one of the suburban streets in the town of Bathurst in New South Wales. It was really thrilling to experience the circuit. Watch your speed! It is very tempting to go a little faster on this well designed, smooth circuit, but it is well policed with speed cameras that will catch you if you exceed 60km/hr.

The most amazing thing about this circuit is the area in the centre. There is farmland with sheep and alpacas lazily grazing and wineries where grapevines are being grown. There are residential houses with their driveways coming directly off the racetrack circuit. Their driveways are cleverly angled away from the direction of the racing to ensure errant racecars can’t accidentally veer off into their homes.

Perhaps it is the wide streets, a result of careful town planning or the expensive and pristine infrastructure or the highly educated population or the mantle as the capital of Australia, the city of Canberra does feel quite sterile and soulless. Nevertheless, a trip to the capital is surely de rigueur for every Australia if only just to see the Parliament house and other national galleries, monuments and museums that their taxes fund.

We visited Canberra, only a few days before the highly publicised anti-vaxxer protests in February. It was amusing to see the people and their vehicles circling the national buildings honking their horns, waving flags and placards and yelling, “Aussie, Aussie, Aussie!!”

We cycled all the way to Parliament House but unfortunately, we could not enter on that particular day. We did however see the piles of riot gear at the ready for the protests in the basement carpark.

When road-tripping the state of New South Wales, it is tempting to hug the coastline and ignore the inland areas. This is somewhat justified as there is a lot of stunning things to see along the coast. (My personal opinion is that some of the New South Wales coastline is more beautiful than the much feted Great Ocean Road drive in Victoria!) Nevertheless, take the time to explore the inland areas of the state. There is much to see.

The Sandstone Caves, just off the Newell Highway between Dubbo and Narrabri was a lucky find. A friendly lady at the Visitor’s Centre gave us instructions on how to get here and we would not found this local gem on our own. This walk made a perfect driving break and these sandstone rock formations are so interesting.

If you are in the area, visiting Hume Dam is awe-inspiring. It had been raining so the volumes of water being released from this dam was staggering.

Visiting the high country of Victoria was a delight. The picturesque Ovens River, runs right through the town of Bright. The scenery at Mount Buffalo National Park was spectacular . Visiting the winter ski towns of Mount Hotham and Dinner Plain was surreal and bizarre.

Staying at Bright Riverside Holiday Park is a perfect way to experience this cute town. It is a short walk to the main street, Woolworths and the Canyon Walk. A short distance in the other direction and across the bridge is the Bright Brewery. A buzzy place for a good meal and some drinks.

When in the high country, take the time to explore the town of Beechworth as well.

Whilst in the high country, the Eldorado Dredge Holes is a must visit. This is one of the largest dredges in the southern hemisphere with its 118 buckets/scoops connected by a conveyor belt. It is a disused gold and tin bucket dredge, left in its last working location near the town of Eldorado. This dredge was used between 1936 and 1954. It used so much power than only the cities of Melbourne and Geelong exceeded its power consumption. It would progress slowly forwards when working, digging up the creek bed as it went along and leaving a scar on the countryside. Supposedly, the sound of this monster in operation could be heard 20kms away.

Waddamana Power Station Heritage Site

Everyone knows that Tasmania gets a lot of rain – especially up in the mountainous centre of the island. When we’ve seen a waterfall with the tremendous roar of water racing down, you can imagine that a lot of energy is available do useful work – and that’s where hydro power comes in.

Waddamana power station is an old power station which started up way back in 1915 (that’s over 20 years before the hoover dam in the USA). It was built to provide power for processing minerals like Zinc and Carbide further south in Tasmania. It was the first hydro power plant built in Tasmania, and now there are loads more in the state, which make lots of power without burning any gas or coal (yay!). Tasmania even sends clean power over to mainland Australia via the Basslink power cable that runs on the ocean floor under Bass Strait.

Waddamana is in a remote location in Central Tasmania, and since it’s only accessible via dirt road, doesn’t get as many visitors as it should. Nevertheless, it’s worth the effort and makes a great side trip when going between Launceston and Hobart. In fact it’s thanks to it’s very remoteness that the power station was preserved. It was just too difficult to remove the heavy equipment through the rough terrain in the area, so they just left it all in place, rather than sell it for scrap!

The complex consists of a number of different parts: the turbine hall, the penstocks, the control room and the town built to service those who worked at the plant.

The Penstocks

In a hydro electric power plant, the pipes that connect the water at a dam at the top of a hill to the power plant are called Penstocks. You can see the pipes coming down the hill in the photo below. The weight of the water pushing down the hill is what gives the energy to the power plant, and by the time the water reaches the bottom of the hill, it’s got a lot of pressure ready to do useful work making electricity.

The Turbine Hall

The real business end of the operation is inside the turbine hall, and this is the most interesting part of the site. This is where the high pressure water from the big pipes is released onto the hydraulic turbines. The great thing about Waddamana is that some of the equipment is opened up so you can see what happens inside these big machines. The yellow and orange buckets in the picture below are what the water is jetted onto which turn the whole machine. The turbine is connected to the generator via a shaft and this makes electricity. You can also see the inside of the generator, with massive windings of copper wire for the different parts (the stator and the rotor).

The inside of an electric generator looks complicated, but there are really two parts – the stator and the rotor. Making electricity is all about movement between a magnetic field and a wire (or lots of wires).

The rotor is the bit that’s rotating (coloured red in the picture below) and is turned by the hydraulic turbine. The rotor has electric windings to set up a magnetic field. The magnetic field is created by electro magnets with a small voltage (called the excitation voltage), which is carefully controlled.

The stator is the bit that’s stationary, so doesn’t spin. This is the outside bit, and consists of lots of wires that have a magnetic field that moves over them and makes electricity. It turns out that the stronger the magnetic field, the higher the voltage that’s created, so controlling the excitation voltage is very important for a power plant.

The buckets that the water hit slowly get worn out by the water jetting onto it and so need to be repaired over time. At the plant, they used to fix them up by opening up the turbine, un-bolting them and putting a weld patch on them.

The water flowing onto the buckets is controlled via a valve that opens up when more power is required. The valve consists of a hole with a sort of shaped needle inside it. If the needle is pushed down into the hole, then it blocks the flow, but if it’s pulled back, then the water flows around the needle in a nice smooth shape, then smacks into the bucket and pushes the turbine around and around.

Control Room

The control room is where the plant used to be operated. The operators could see what was happening on the grid and adjust the amount of power that the plant supplied. They could also turn off one of the generators if it wasn’t required, or bring one on if more power was required. Normally power demand would go up and down at particular times of day as industrial or other consumers would start up or finish for the day. Since it’s very old, there are no computers, but instead loads of nobs and dials. The interesting thing is that making hydroelectric power hasn’t changed that much over the years, it’s still a matter of passing that water through a turbine and spinning a generator. In the control room they can make sure the power plant is providing the right voltage and frequency to the grid. Frequency is the rate at which the current and voltage supplied by the plant cycles up and down, and this needs to be kept at 50 cycles per second (50 Hz). They have a clock which measures this and if the frequency is a little slow, then the clock starts to read a little slow, so then they nudge the frequency up a little bit using one of the many nobs that control the generators. Simple but effective!

electrical Stuff

Once the plant has made power, then it needs to get to the end users. That means lots of wires and transformers and switches.

Outside of the powerplant there are some massive power lines and large transformers. The power lines carry the power and the transformers increase the voltage of the power (higher voltages mean that less of the energy is lost as it goes through the power lines).

The electricity is switched on and off using big switches like in the picture below. They call them breakers because they break the current when they’re open. These really old ones have wooden doors and glass windows so you can see inside. Breakers are not so different to a light switch you use at home, except they’re much bigger! Breakers are important safety features of a power plant, since they open up if something goes wrong and hence prevent things getting very bad (electrical faults cause nasty fires or explosions).

In the 1960’s, the plant was shutdown and replaced with another hydro power plant which was three times as powerful. If you are in Tasmania, this is a really cool, interesting and informative place to visit.