Complex sentence: The "Cuckoo" was built by the Sopwith Aviation Company, better known for making the Sopwith Camel and Sopwith Pup, though the "Cuckoo" would also prove to be a good design, though had only a relatively brief career.
Split into simpler sentences: The "Cuckoo" was built by the Sopwith Aviation Company, better known for making the Sopwith Camel and Sopwith Pup. Though the "Cuckoo" would also prove to be a good design, it had only a relatively brief career.