Complex sentence: Blue Danube was not engineered as a weapon equipped to withstand the rigours of service life; it was a scientific experiment on a gigantic scale, which needed to be re-engineered to meet service requirements, resulting in Red Beard.
Split into simpler sentences: Blue Danube was not engineered as a weapon equipped to withstand the rigours of service life. It was a scientific experiment on a gigantic scale, which needed to be re-engineered to meet service requirements, resulting in Red Beard.