The Sydney applied Blackburn's three-engine reliability idea to a hundred-foot-span monoplane built around aluminium-copper alloys. Its deep RAF 30 wing section shows how standardized aerodynamic forms could guide a radical-looking airframe. Despite the monoplane's promise, decision-makers still regarded biplanes as the safer and more dependable choice for large flying boats. Blackburn also adapted the design lineage into the Nile civil transport proposal for an East African operator. Short's stronger position in the civilian flying-boat market gave it an advantage in military orders.
Notable Point · 1:39:59-1:43:26
Sydney tests an all-metal flying-boat monoplane
The hundred-foot-span Blackburn Sydney explored an all-metal monoplane flying boat, but confidence in biplane reliability and Short's commercial position limited the concept.