Complex sentence: This engine was test flown in May 1946 fitted to the bomb bay of an Avro Lincoln, performance was poor due to airflow problems, the centrifugal compressor was redesigned but similar problems were encountered when the Proteus started ground testing on 25 January 1947.
Split into simpler sentences: This engine was test flown in May 1946 fitted to the bomb bay of an Avro Lincoln, performance was poor due to airflow problems. The centrifugal compressor was redesigned but similar problems were encountered when the Proteus started ground testing on 25 January 1947.