Original sentence: The actual flight of the plane made matters worse.The estimated maximum speed was also less than originally expected.The obvious setbacks began when the testing of the N-9M showed that the range of the B-35 would probably be 1,600 mi (2,575 km) less than the 10,000 mi (16,093 km) requested by the Army Air Force
Edited sentence: Actual flight tests of the plane revealed several problems