Was thinking about buying a tyre pump for the car/land rover. This is because Sainsbury’s have started to charge at the tyre pump. Then I was thinking that those pumps they sell for car tyres are particularly rubbish and probably very very slow. It occurred to me that I could use a 240V pump to pressurise a cylinder to a high pressure then use this to inflate tyres.
So speaking with a friend who does scuba diving, there are cylinders available that are 3 litres and will carry that pressure.