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.
Amazing Nick! Loving this, it looks so accurate, it sounds so real. Another amazingly technical creation from you :-) Our Ferrari is going to be featured in the 2013 LUGnuts Calender!!! Send me your postal address to my Flickr inbox please and you can have a copy :-D
Hey, if a car is coming, then it _must_ be a Mini Cooper. Me waits impatiently for a full-on Monte Carlo replica, complete with that infamous set of lights that got them out of their victory in the '66 rally.
And of course, a transverse 4-speed gearbox and that incredible suspension setting of the time. Elastic Rubber balls! Guys, you have to drive one to get what I mean; more fun on 4 wheels I ever had, given my miserable budgets.
Cheers Nick and congrats of course. If only I could make out how you are driving the oil pump...
Oh dear lord what is about to befall us... Nick B. building at ludicrous scale??? With Mog tires??? I can't wait. This engine alone is quite special too, though. What a nice little replica, and will ALL the working gubbins! Proper stuff right here.
I always feel this type of work is the true pinnacle of the technic possibilities of Lego. The fact you can drop the engine out of one of your builds and it stands up as a quality build in its own rights is a testament to your skill. Great in every sense.