Having worked so many years in manufacturing and other various jobs, I had heard many expressions like “balls out”. I knew what the modern term was referring to. Working hard and steady to get something accomplished. Then one day I was watching “How Stuff Works” and there was a show about steam engines.
They were demonstrating how Watts had developed a more efficient engine and used a centrifuge governor to regulate speed. The term “balls out” comes from the centrifuge governor. The governor was typically two balls placed on opposing arm over a shaft. Below the balls were weights on the shaft. As the speed of the engine increased and the shaft spun faster the weights would rise and cause the arms to move up and the balls to move outward. Thus if the engine was running at a high rate of speed and doing a lot of work it was “balls out”! Ok, what do you think I was going to say?