will have to withstand a great deal the ignition phase forces the piston downwards turning vertical motion into the circular motion of the crankshaft the crankcase is turned once more and again the overhead gantry comes into action as it brings up the power unit [Music] the men slowly lower the cylinder unit into the engine in its interior the connecting rod grips the crankshaft with millimeter accuracy the team installed 20 power units in one day the con rods are provisionally secured with white dummies because the engine will be