Giving Britain Princess technology in 1935 would change both heavy bombers and the engines available for other aircraft. The quoted range of 5,720 miles exceeds the 3,250 miles cited for the B-29, prompting speculation that Britain could develop a different route to very long-range bombing. A military version could operate from Scottish lochs and approach Germany from the north. Its quoted speed and altitude would make interception difficult, although German fighters could still catch it and the exchange does not treat it as invulnerable. A heavily armed version is imagined as an enlarged Sunderland. Production in quantity could reduce cost, while rearmament spending would support aircraft built around the new engines. Smaller designs, including a Wellington-like bomber or a fighter built around a 2,500-horsepower engine, would need substantial redesign. More engine power would also expose gaps in contemporary knowledge of transonic flight.
Notable Point · 4:22:29-4:29:12
Princess engines reshape a counterfactual British bomber force
The 1935 technology transfer extends from long-range flying-boat bombers to redesigned fighters, with aerodynamics still limiting what greater engine power can achieve.