The early models of the Whittle jets were sent to the US towards the end of the war. GE and Westinghouse were selected to develop US jets for our military needs. These companies had the background in rotating steam turbines and seemed to be the ones to develop the new jets. Pratt and Whitney soon saw what would happen to the reciprocating engine business and joined GE and W designing and building jets. The rest is history. In England, Frank Whittle formed a research and development company, and Rolls Royce took over the jet engine manufacturing business.