If an article I've read in Air-Britain's AeroMilitaria some years ago about chin radiators (called beard radiators at the time) and how RAE tested them comparing them to leading edge radiators, it was found that there's wasn't a lot of difference in lost performance by using them.One of the very few Tornado / Tempest / Typhoon not spoiled by that horrible chin radiator...
Please see https://www.secretprojects.co.uk/threads/hawker-tempest-prototypes-projects.27163/Anyone know the differences between LA610 and VP207 (the other Sabre Fury that had some changes vs LA610)?