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Fuel tanks

Propane fuel tanks are usually cylindrical pressure vessels made from aluminium, stainless steel, or titanium with a valve at one end to feed the burner and to refuel. They may have a fuel gauge and a pressure gauge. Common tank sizes are 38, 57 and 76 litres (10, 15 and 20 US gallons). They may be intended for upright or horizontal use and may be mounted inside or outside the basket.

The pressure necessary to force the fuel through the line to the burner may be supplied by the vapor pressure of the propane itself, if warm enough, or by the introduction of an inert gas such as nitrogen. Tanks may be preheated with electrical heat tapes to produce sufficient vapor pressure for cold-weather flying. Warmed tanks are usually also wrapped in an insulating blanket to preserve heat during the setup and flight.