What was the core inefficiency Watt identified in the Newcomen engine?
Answer
The constant cycle of heating and cooling the main cylinder with every stroke wasted energy.
Watt realized that the process of injecting cold water directly into the cylinder to condense steam immediately destroyed the heat stored in the metal walls, causing the machine to waste nearly 75 percent of the supplied coal energy on reheating the cylinder.

Related Questions
What was James Watt's primary genius regarding the steam engine?What was the core inefficiency Watt identified in the Newcomen engine?What invention, developed around 1765, was Watt's fundamental thermodynamic breakthrough?By roughly what percentage did Watt's separate condenser reduce fuel consumption compared to the Newcomen engine?Where was James Watt born in 1736?What key function did the double-acting engine serve?What was the mechanism Watt developed to ensure the piston rod moved nearly vertically while attached to a moving beam?What device did Watt introduce to automatically maintain a steady engine speed regardless of load changes?What was the primary economic arrangement utilized by the Boulton & Watt partnership for selling their engines?The fundamental unit of power in the SI system, named after James Watt, is defined as what?