The first attempt to launch the rocket was halted Saturday when a flight computer detected high pressure in an engine combustion chamber.

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The oxygen that remains is burned with fuel and water in a chamber modeled after a rocket engine.

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J. customizer William Dodge, who created one bike for Herold using a 1947 Harley flathead engine and another using a 1966 shovelhead engine (that is, with a domed combustion chamber).

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In the conventional Stirling engine, a fixed amount of helium is compressed in a cool chamber and then transferred to a chamber heated by an external burner.

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The difference between turbocharging and supercharging is simple: a turbocharger boosts engine air pressure by using exhaust gas to power a turbine that pushes more air into the combustion chamber.

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