The OA-10A Catalina (2)

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through the addition of a retractable tricycle undercarriage. The PBY-6A featured hydrodynamic improvements designed by the Naval Aircraft Factory. The Soviet Union produced a license-built version for their Navy called the GST and powered by Mikulin M-62 radial engines. Boeing Aircraft of Canada built the PB2B-1 and PB2B-2 ("Canso"), and a derivative of the PBY-5A was built by Canadian Vickers. In US Army Air Force service, the aircraft was known as the OA-10A (PBY-5A) and OA-10B (PBY-6A). The Royal Air Force's Coastal Command flew Catalinas under the designations Catalina Mk I/II/III/IV.

Because of their worldwide popularity, there was scarcely a maritime battle in WW II in which they were not involved. The PBY had its vulnerabilities: it was slow, with a maximum speed of 180 mph, and with no crew armor or self-sealing tanks, it was highly vulnerable to anti-aircraft attack. However it was these weaknesses, coincident with the development of effective radar, and Japanese reliance on night transport, which led to the development of the "Black Cat Squadrons." These crews performed nighttime search and attack missions in their black-painted PBYs. The tactics were spectacularly successful and seriously disrupted the flow of supplies and personnel to Japanese island bases.

The Catalinas also proved effective in search and rescue missions, code-named "Dumbo." Small detachments (normally of three PBY's) routinely orbited on stand-by near targeted combat areas. One detachment based in the Solomon Islands rescued 161 airmen between January 1 and August 15, 1943, and successes increased steadily as equipment and tactics improved. After WW II, the PBY continued its search and rescue service in many Central and South American countries, as well as in Denmark, until the 1970's.

The Catalina has also proved useful in civilian service: in scheduled passenger flights in Alaska and the Caribbean, in geophysical survey, and mostly, in fire-bombing for the U.S. Forest Service until the recent retirement of the last PBY. Through its long and varied service, the Consolidated PBY Catalina has earned its reputation as the workhorse of naval aviation.

The PBY Catalina got its name from the British who used it extensively during WW2 after the United States delivered a large quantity via the lend-lease program which was instituted before the United States entered the war. The lend lease program allowed war materials to be provided to embattled Britain and later Russia, with payment due at a later time. The British, who at the time were hard pressed for equipment and money, owe much to the lend lease program. As for the PBY designation, P is for patrol, B is for bomber, Y is the USA military designation for the manufacturer, Consolidated. The PBY was made in 7 major versions and produced over a considerable period of time from the 30’s thru the 40’s and continues to be actively used by civilian organizations for a variety of purposes even today. The PBY-6, which was the final version of the PBY was a twin engine amphibian with 2 Wright R1830 18 cylinder engines capable of manifesting 1200 horse power (T.O.) and a maximum speed of between 175 and 195 miles an hour. (depending on sub variant and configuration)

The typical cruising speed of the PBY was 100 to 120 miles per hour. The aircraft had an enormous range and loitering capability with an over all range from 2,500 to 2,900 miles and a service ceiling of 15,000 to 22,400 feet. The PBY is a large high wing monoplane with a total wingspan of 104 ft. and a total wing area of 14,000 square feet. The aircraft measures in at 63 feet 10 inches and has a gross weight of 31,800 pounds to 36,000 pounds. The PBY-6 also came equipped with a radar array fitted in a tear drop shaped pod above and just behind the cockpit. While the Catalina’s came with a wide variety of weapons positions and capabilities, the standard armament was a semi flexible .50 caliber machine gun in each dorsal blister firing from removable drums of ammunition, a semi flexible .50 caliber machine gun in a tunnel gun facing aft and down and a forward .30 mounted in a revolving turret in the nose, just below the cockpit wind screen. The Catalina also carried hard points under the wings for a variety of weapons including but not limited to aerial torpedoes, depth charges and a variety of bombs. Some of the variety of other armaments the PBY was fitted with included the replacement of the front turret with a more aerodynamic turret firing 1 or 2 .50 caliber machine guns, giving the forward armament considerably harder punch. Also the dorsal guns, which where fitted in large teardrop shaped glass blisters, where sometimes fitted with an impressive twin .50 caliber machine gun system, giving heavy side and rear area coverage.

One problem the consistently plagued the slow and unmanageable aircraft was the large dorsal blisters. Since the dorsal guns fired canisters instead of belted ammunition, the gunner was required to travel up to the next compartment to bring back a new canister, since the guns were in large glass blisters, the pilots of attacking fighters could actually see when the gunners would run out of ammo and would attack as the gunner went forward to get more ammo. This was sometimes remedied by replacing the canister guns with guns capable of firing belts of ammo, but the problem still persisted as a wary fighter pilot could see when the gunners belt expired and would attack as he loaded a new one. The early PBY's were very different than the PBY 5 and 6 models which came later and saw so much service in the Second World War. The original PBY's had no landing gear and were strictly flying boats. They could be brought on shore by adding beaching gear, a set of removable wheels. The early PBY's was primarily serviced by ships called seaplane tenders that could lift the plane out of the water and bring it on board for service. The early PBY’s also did not have dorsal blisters but instead had small windows that could be pulled back exposing the gun and the pilot to the air stream. The PBY's’ primary goal was maritime patrol and anti shipping, although as the war developed it was quickly show to be very vulnerable to air attacks and anti aircraft artillery and ceased heavy bombing and anti shipping attacks because of massive losses. However the PBY's initial work as a patrol aircraft was to prove invaluable as the aircraft took part in almost every major sea battle in the early part of the war. It was responsible for sighting the Bismarck and leading to its eventual destruction, for spotting the Japanese fleets at both Midway and Wake Island and a variety of other critical battles. [Back]