Puffer on the canal at Crinan: coal for Vic 32

 We found this pile of coal by the canal at Crinan. I've used the formula for the volume of a cone: height 1.5m, radius 1m gives a volume of 1.57 cubic metres. Coal varies in density but an average value might be 800 kg per cubic metre from a little searching. That gives about 1250 kg of coal. I found the energy density quoted as 24 million joules per kg so the pile might be worth 30 billion joules.

 I looked up Vic 32. http://savethepuffer.co.uk/puffer-specifications/ Data says 120 horse power. That's 88260 Watts. Power = energy/time so time = energy/power = 30 billion / 88260 = 342000 seconds. That's nearly 100 hours or 4 days coal.