Could late-1920s and 1930s metallurgy produce jet and gas-turbine engines with a useful service life?
Short answerProbably, if development remained gradual: marine and aircraft firms already held complementary materials expertise, and sustained procurement would drive further alloy work.
NotesThe answer is a qualified yes: blade life and metallurgy would remain limits, but Britain already possessed relevant knowledge. Admiralty metallurgists and firms such as Parsons, Browns, and Vickers worked with high-pressure turbines, gun steels, and high-temperature materials, while aircraft companies understood compact engines. A funded program would bring those specialisms together earlier and make the engine requirements themselves drive further alloy development. Improvement would still come across several generations rather than through a sudden leap to mature postwar machinery.