Original sentence: Never built, the B-29C was a modification of the B-29A re-engined with improved Wright R-3350 engines.None were built.Section source: Baugher and National Museum.The Army Air Force originally ordered 5,000, but cancelled its request when World War II ended.The Boeing B-29 Superfortress variants is an extensive list of all the experimental and production models that Boeing made and the specific unique elements of each variant and/or design stage of the B-29 Superfortress heavy bomber.Washington B Mk 1 - This designation was given to 88 B-29As supplied to the Royal Air Force
Edited sentence: The Army Air Force originally ordered 5,000, but cancelled its request when World War II ended and none were built.The B-29C was a modification of the B-29A re-engined with improved Wright R-3350 engines.The Boeing B-29 Superfortress was produced in a large number of experimental and production models.Washington B Mk 1 - This was the service name given to 88 B-29As supplied to the Royal Air Force.and National Museum