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1:6 Scale BMC A Series Engine . A working model of a classic power unit. . This engine powered two generations of small British cars, including 5 million Minis - the proper ones, that is... It was in production for nearly half a century after appearing as an 803cc unit in the 1952 Austin A30. This model, with many moving parts and plenty of detail, is of the 1275cc twin-carb unit from a 1960s Mini Cooper S. A short video of it doing it's thing... Talk among yourselves while I bore you with the details... The standard Lego M motor is an excellent 1:6 copy of a Mini's starter, which is handy... It acts on the flywheel's circumference. The crankshaft runs in five main 'bearings' rather than the two that Lego engines usually get. With a (square!) bore of 2 studs for those big ol' pistons and a stroke of the same the swept volume of each cylinder is square as well. Camchain and belt drive for the fan and alternator... The extra pair of gears at the top of the chain make sure the camshaft runs at the correct speed. Camshaft lobes push the pushrods, which push the rockers, which push the valves... Distributor drive is taken off the camshaft... Which turns the rotor arm (sort of) inside the distributor cap. Off with it's head! 4 elastic bands = 8 valve springs, which is nice. Head correctly torqued down (!) and it's ready to run again. Feel free to spot the starter, alternator, distributor, dipstick, oil pump, coil, twin S.U. carbs etc. Or not. There's a few things missing in this picture...

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