I know its Wiki but it seems that originally RR was asked to develop an air cooled engine and only went ahead on condition it would be water cooled.
https://en.wikipedia.org/wiki/Rolls-Royce_Eagle
At the outbreak of World War I in August 1914, the Royal Aircraft Factory asked Rolls-Royce to develop a new 200 hp air-cooled engine. Despite initial reluctance they agreed on condition that it be cooled by water rather than air, as this was the company's area of expertise.
What effects on RR engine development would occur if RR had successfully developed an air cooled engine of the required power at this time?
https://en.wikipedia.org/wiki/Rolls-Royce_Eagle
At the outbreak of World War I in August 1914, the Royal Aircraft Factory asked Rolls-Royce to develop a new 200 hp air-cooled engine. Despite initial reluctance they agreed on condition that it be cooled by water rather than air, as this was the company's area of expertise.
What effects on RR engine development would occur if RR had successfully developed an air cooled engine of the required power at this time?