The Catalina’s value was never in speed or firepower — it was in reach and endurance. A single PBY could fly a patrol arc of well over a thousand miles, loiter for many hours, and return, covering areas of ocean that faster aircraft could only glimpse. That made it the ideal scout, convoy escort and submarine deterrent: a U-boat that had to stay submerged to avoid a circling Catalina could not race ahead of a convoy. The same qualities — long range, the ability to land on water, and a roomy hull — let the type reinvent itself as a night raider and a rescue aircraft. Versatility, not performance, is why the PBY is remembered as one of the war’s decisive aircraft.

Most flying boats of the era carried fixed stabilising floats under each wing to keep the aircraft level on the water — and paid for them in drag. Consolidated’s design let each float swing up and outward in flight until it formed the streamlined wingtip, and swing back down for landing on water. It was a simple, robust mechanism that shaved drag and helped give the Catalina its remarkable range. The parasol wing, mounted above the hull on a central pylon, kept the propellers and engines clear of spray while leaving the deep hull free for fuel, crew and payload.

On 26 May 1941 a Catalina of RAF Coastal Command relocated the Bismarck after contact had been lost — a US Navy officer, Ensign Leonard “Tuck” Smith, was at the controls as a “special observer.” The sighting let the Royal Navy close in for the kill. Thirteen months later, on 3–4 June 1942, PBYs on long patrols from Midway found the Japanese carrier force and even pressed home a night torpedo attack on a tanker — the first blows of a battle that turned the Pacific war. From late 1942 the black-painted Black Cat squadrons made the night their own, while Dumbo rescue crews saved airmen who would otherwise have been lost. No other aircraft type touched so many pivotal moments of the naval war.

The Catalina was a mass-produced wartime aircraft, and firm dollar figures are scarce and inconsistent. Period sources put the flyaway cost of a wartime PBY very roughly in the region of $90,000 — cheap by the standards of a large multi-engine aircraft, which was part of the point: it was affordable enough to build in the thousands. No credible cost-per-flight-hour figure exists in open sources for the type, and any precise modern-dollar number you see should be treated as an estimate rather than a documented figure.