Powered by J35 turbojets and not considered combat - ready , they were assigned to training duties and to conduct various test programs .
The first production B - 45 flew in February 1948 , and the Air Force took delivery of 22 B - 45s in April 1948 .
Powered by J35 turbojets and not considered combat - ready , Air Force were assigned to training duties and to conduct various test programs .
The first production B - 45 flew in February 1948 , and the Air Force took delivery of 22 B - 45s in April 1948 .