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Air can be turned into a liquid by cooling it to around -196 °C using standard industrial equipment; 700 liters of ambient air becomes about 1 liter of liquid air, which can then be stored in an unpressurised insulated vessel. Compressed Air EnginesConceptEnginesEngines'
This is the key to setting a new standard of fuel efficiency and emissions reductions. A 1-liter 2-cylinder Grail Engine using Pulstar pulse plugs is expected to yield 100+ mpg without batteries or power grid [Note: Using a commuter vehicle weighing 1,600 lbs/726 kg]. Ignition occurs via the sparkplugs.
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