The historical British Purchasing Commission and rapid creation of the Mustang frame a possible American carrier-fighter request. Britain needed American capacity because domestic factories were prioritising Royal Air Force fighters for the Battle of Britain, not because British designers had no usable naval concepts. In a Pacific-first war, a larger share of production could go to Fleet Air Arm aircraft from the outset. A later German and Italian threat might reverse that balance and prompt Britain to seek an American fighter project after all. Industrial allocation and timing determine whether the same design opportunity appears for a different purpose and possibly with a different requirement.
Notable Point · 50:20-51:47
Aircraft-production capacity drives the Mustang counterfactual
Without an immediate Battle of Britain, Britain may not need an American carrier fighter because production allocation, rather than a lack of domestic designs, is the central constraint.