#### oxo66

##### Ephemeral Spectre

- Joined
- Nov 25, 2017

- Messages
- 275

So the next instalment of 'Colossal Machines' (Sub Zero) has not been as fruitful as I was hoping for, but it did manage to re-use a few of our old favourites in new ways.

So we learned that the 'rotary snow plough' used on trains in snowy places can remove 77,000 tonnes of snow per hour, which is equivalent to the weight of 35,000cars(but no mention of which type of cars, not even clarifying with 'average' or 'normal').

We also learned that Arctic sea ice can be 5 metres thick, the height ofa double-decker bus.

And the 'Arktika' ice-breaker ship is the length of2 football fieldsat 170 metres, and as wide asa 10 storey buildingat 34 metres (I guess they mean as wide as the building is tall).

Also, each of it's 3 motors weighs 270 tonnes, as much asthe average house.

I think I'm an episode or two ahead of you, and I've just seen the one on mining equipment. Which showed a higher frequency of comparisons but less variety:

Two of the machines were compared to that average house, the weight of which is now so familiar: the Belaz 75710 dump truck is two and a half times as heavy as the average house while the Marion 8050 walking dragline weighs 'almost 20 times more than the average house' Since the dragline's weight is 3,000 tons the average house must have lost weight since the sub zero episode...

Anyway we also had lots of cars: The Leibherr 9800 excavator weighs about the same as 500 cars but its bucket can lift 80 tons, the equivalent of 40 vehicles of unspecified type. And the bucket wheel excavator Bagger 293, has a conveyer belt 3 metres wide 'big enough to carry away your average car'.

Volumes of spoil moved are of course measured in Olympic swimming-pools-full: 95 OSPF a day for the bagger, 20 OSPF a day for the Leibherr.

The silliest comparisons were for power output: the Belaz has four electric motors each producing 2,300 hp 'twice as powerful as a modern formula 1 racing car' which made me think "wow formula 1 power trains are amazing".

And the Leibherr 9800 was described as 'eleven times more powerful than the average excavator' Very helpful.

It was actually a very enjoyable episode.