General characteristics * Type: Seven-cylinder single-row supercharged air-cooled radial engine * Bore: 5.25 in (133 mm) * Stroke: 5.5 in (140 mm) * Displacement: 834 cu in (13.65 L) * Length: 52.8 in (1,342 mm) * Diameter: 47.6 in (1,210 mm) * Dry weight: 637 lb (289 kg) Components * Valvetrain: Two pushrod-actuated valves per cylinder * Supercharger: Centrifugal, 5.4:1 reduction * Fuel system: Claudel-Hobson carburettor * Fuel type: 87 octane rating petrol * Cooling system: Air-cooled * Reduction gear: No Performance * Power output: o 338 hp (252 kW) at 2,100 rpm for takeoff o 345 hp (257 kW) at 2,425 rpm at 7,875 ft (2,400 m) * Specific power: 0.41 hp/cu in (18.83 kW/L) * Compression ratio: 6.35:1 * Specific fuel consumption: 0.45 lb/hp/hr (271 g/kW/hr) * Oil consumption: 0.24–0.45 oz/hp/hr (9–17 g/kW/hr) * Power-to-weight ratio: 0.54 hp/lb (0.89 kW/kg)

Distillation of a simulated crude oil using a Vigreux condenser (air-cooled) as a fractionating column to show school pupils different hydrocarbon fractions condensing up the glass column as the temperature increased. The Liebig condenser (water cooled) condenses the hydrocarbon fractions as they left the Vigreux condenser. The hydrocarbon fractions were observed as clear colourless liquids as they condensed. The fraction with the lowest boiling point evaporated first and its distillate was the first to collect at the oulet of the Leibig condenser. The hydrocarbon fractions were observed as clear colourless liquids as they condensed. The process is evaporation followed by condensation. Photographed at Harris Academy, Dundee on 2 February 2009.