[kiwijimm]

Thats just not true... The British Bombes worked just fine and were VERY effective. You might be confused in thinking that the British Bombe was a single machine. It wasn't there were several iterations of it and it evolved throughout the war to meet the new demands. Additionally the ORIGINAL Bombe didn't include the diagonal board enhancement invented by Gordon Welchman. This improved the performance of the Bombes greatly.

The US Bombes were better and workloads moved over to them for that reason, mainly because the US could make them faster with a better (later) design. But they come online 3 years after the first British Bombes which were in effective use until the US Bombes were available. It was the 4 rotor naval enigma that slowed things down somewhat.

Thanks, James