The jet engine, magnetron and Enigma details were useful to the US. Even though the Brits were planning of building an Atomic bomb, the Maud report sent with T

The jet engine, magnetron and Enigma details were useful to the US. Even though the Brits were planning of building an Atomic bomb, the Maud report sent with Tizard, severly underestimated the engineering problems necessary to build one. The huge industry of the US was needed to create the Manhattan Project.