Scapa and Stranraer as Supermarine workhorses

The Scapa evolved through an engine change from Rolls-Royce Kestrel to Bristol Pegasus power into the Stranraer. Supermarine built fifteen Scapas, and both types were large, long-range successors to the Southampton rather than small coastal machines. Their strength and durability made them dependable service aircraft. They were the reliable commercial side of Supermarine that paid the bills while more experimental work pushed aeronautical boundaries.