December 1938, Burbank, California.

A twin engine airliner lifts off from Loheed’s factory runway.

Banks gently over the San Fernando Valley and climbs into a clear winter sky.

It looks like any other commercial aircraft of the era.

Sleek, modern, designed to carry businessmen between American cities in airond conditioned comfort.

Within 18 months, aircraft exactly like this one will be hunting German submarines across the North Atlantic.

They will score the first aerial victory by any aircraft operating from a base in the British Isles.

They will capture a yubot intact.

They will be among the first allied aircraft to strike back in the Pacific.

And they will do all of this despite being dismissed as underpowered, unsuitable, and nothing more than a desperate stop gap until proper military aircraft could be built.

The Loheed Hudson was a converted American airliner that became the backbone of RAF Coastal Command during the most desperate years of the war.

It was the first Americanbuilt aircraft to fly combat missions with the RAF.

And according to operational records from the period, no other aircraft type flew more sorties for coastal command during those critical early years when Britain stood alone against the yubot threat.

This is the story of how a civilian passenger plane helped save the battle of the Atlantic.

The problem facing Britain in 1938 was brutally simple.

Coastal Command’s primary patrol aircraft was the Avro Anen, a gentle, forgiving machine that pilots loved to fly and commanders hated to send into combat.

The Anson carried just 360 lb of bombs.

It cruised at 188 mph.

Its range barely covered the approaches to British ports against the growing threat of German submarines and surface raiders.

The Anson was a death trap.

Coastal command needed something faster, something that could carry real weapons, something that could actually find and attack enemy vessels before they found British convoys.

But British aircraft factories were already overwhelmed with orders for fighters and bombers.

There was nothing available.

In April 1938, a British purchasing commission arrived in the United States with $25 million and instructions to find anything that could help.

They were originally looking for navigation trainers.

What they found instead was Loheed’s Model 14 Super Electra, a sleek twin engine airliner that had just entered commercial service.

Air Commodore Arthur Harris, who would later command Bomber Command, recognized immediately what the Model 14 could become.

The airliner was fast, nearly 250 mph.

It had excellent range and its fuselage was large enough to carry a useful weapons load.

When Harris asked Loheed’s young chief engineer, Clarence Kelly Johnson, how quickly the company could produce a military conversion, Johnson reportedly sketched the modifications overnight in a London hotel room.

Loheed produced a full-scale military mockup in 5 days.

Harris was convinced.

On the 23rd of June 1938, Britain signed a contract for 200 aircraft, the largest international aircraft sale by an American company at that time.

The conversion from airliner to patrol bomber required substantial modifications.

The passenger cabin became an internal bomb bay capable of carrying 1,400 lb of ordinance.

Two fixed Browning machine guns were installed in the upper nose.

A bolt and pull power operated dorsal turret with two more Brownings provided defensive firepower.

Navigation and bombing equipment replaced the airline seats.

The civilian 900 horsepower right cyclone engines were upgraded to 1100 horsepower military variants.

The result was an aircraft nearly 60 mph faster than the Anson.

With more than twice the range and four times the bomb load, Loheed delivered the first Hudson so quickly that they triggered a bonus clause in the contract, adding 50 more aircraft to the order.

A logistical quirk of American neutrality law created one of the war’s stranger images.

Because combat aircraft could not legally be transferred to foreign buyers on American soil.

Hudsons were flown to Pembina, North Dakota.

Landed on the United States side of the border, then physically towed across into Canada by tractors.

From there, they were shipped to Liverpool.

The game changer came on the 10th of November 1940 when Captain Donald Bennett led seven Hudson Mark III’s from Gander Newfoundland to RAF Alderrove in Northern Ireland.

This was the first transatlantic formation ferry flight of military aircraft.

All seven arrived safely after roughly 10 hours.

Bennett would later found the Pathfinder Force.

His Hudson flight pioneered RAF Ferry Command, which delivered over 10,000 aircraft across the Atlantic by war’s end.

By the outbreak of war on the 3rd of September 1939, 78 Hudsons were operational with Coastal Command.

They were about to make history.

On the 8th of October 1939, three Hudsons of number 224 squadron were patrolling toward the Skaggarak when they encountered a German Dornier Du 18 flying boat.

The Hudsons attacked.

The German aircraft went down.

Its crew was rescued by a Danish fishing vessel.

This was the first enemy aircraft destroyed by any aircraft operating from a base in the British Isles.

A significant distinction given that Britain’s home air defense was the existential concern of the period.

Earlier victories had occurred over France and at sea, but this was the first from British soil.

The Hudson had announced its arrival, but the more important work was far less dramatic.

Day after day, in weather that kept other aircraft grounded, Hudson crews flew endless patrols over the gray waters of the North Sea and the Atlantic approaches.

They escorted convoys.

They searched for submarines.

They reported enemy ship movements.

They laid mines.

They rescued downed air crew.

The Hudson’s technical specifications revealed an aircraft that was on paper surprisingly capable for a converted airliner.

The Mark III variant, which formed the bulk of Coastal Command’s fleet, could reach 255 mph at 15,000 ft.

Service ceiling was 25,000 ft.

Range with extended fuel tanks exceeded 2,000 mi, enough for patrols lasting 11 hours or more.

Armament evolved throughout the war.

Early Marks carried just four machine guns.

By the Mark III, crews had seven, including beam guns that allowed defensive fire against attacking fighters.

Late war Mark sixes of number 608 squadron carried underwing RP3 rocket projectiles, becoming the first squadron to sink a yubot using rockets.

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Now, let us get to the combat record.

The Hudson’s most famous single action came on the 27th of August 1941.

Squadron leader James Thompson of number 269 Squadron was patrolling from Iceland when his aircraft’s ASV radar detected a contact at 14 mi.

He turned to investigate.

What Thompson found was U570, a German submarine on its very first war patrol.

The boat had surfaced because its crew was seasick and its equipment malfunctioning.

Thompson dropped four 250lb depth charges, detonating roughly 10 yard from the hull.

What happened next demonstrated both the Hudson’s limitations and its crew’s determination after releasing his depth charges.

Thompson had only a single machine gun still functional.

He had no more bombs.

He could not actually destroy the submarine, but U570’s captain did not know this.

Seeing the Hudson circling overhead, apparently preparing for another attack, he displayed a white sheet in surrender.

Thompson circled for hours, keeping the submarine under observation until a Catalina from another squadron could relieve him.

Royal Navy vessels arrived that evening to take possession.

U570 was repaired, commissioned into the Royal Navy as HMS Graph, and became the only Yubot to serve operationally on both sides of the war.

The German crew had thrown their Enigma machine overboard, but missed files in the radio room containing paired coded and decoded messages, a gift to Bletchley Park.

Across the war, Hudsons operating with British, American, Canadian, and Australian forces were credited with destroying or capturing approximately 26 Ubot.

On the 1st of March 1942, a United States Navy PBO1 Hudson of Squadron VP82 sank U656 south of Newfoundland.

The first Ubot destroyed by a United States Navy aircraft.

On the 7th of July that year, a United States Army Air Force is a 29 sank U701, the first Army Air Force’s Ubot kill.

The Royal Canadian Air Force Eastern Air Command scored its first kill with a Hudson that same summer.

This concentration of firsts across four different air forces reveals the Hudson’s true significance.

It was everywhere.

During the critical years of 1940 to 1942, when the outcome of the Battle of the Atlantic remained genuinely uncertain, the Hudson was often the only modern patrol aircraft available in sufficient numbers to maintain coverage.

By December 1941, according to Coastal Command operational returns, 170 Hudsons were available compared to just 18 Catalinas and nine Sunderlands.

The Hudson equipped at least 13 frontline squadrons simultaneously at peak strength.

RAF records indicate it achieved the best sorty to loss ratio of any frontline aircraft during the first year of war.

The Hudson’s versatility extended beyond submarine hunting.

During the Dunkirk evacuation in June 1940, numbers 206 and 220 Squadrons provided air cover for the beaches.

On the 1st of June, 220 Squadron shot down four Junkers 87 Stookers.

206 squadron claimed two messes 109s.

These were patrol bombers engaging frontline fighters and winning.

Earlier that year, Hudsons of 220 and 233 squadrons had located the German prison ship Altmark hiding in Norwegian waters carrying British merchant sailors captured by the graphs.

Their reconnaissance enabled the famous boarding action by HMS Cosack that freed nearly 300 prisoners.

Number 269 squadron operating from Iceland maintained one of the longest Hudson deployments of the war.

From March 1941 to January 1944, they flew constant patrols across the Mid-Atlantic Gap, the zone beyond the range of shore-based aircraft where Yubot had previously operated with impunity.

They escorted battleship HMS Prince of Wales when she carried Prime Minister Churchill to the Atlantic Charter Conference with President Roosevelt.

They sank multiple Ubot through 1943, including U646, U273, and U336.

Yet throughout its service, the Hudson carried a reputation for being underpowered.

This criticism deserves examination because the reality is more complicated than the label suggests.

The Hudson Mark1 produced 2200 total horsepower against a loaded weight of 17,500 lb.

This gave it a powertoweight ratio of.

126 horsepower per pound.

The Vicar’s Wellington Mark III often considered a proper military aircraft managed only 102.

The Bristol Buffett achieved 106.

The Ants and the Hudson replaced struggled along at 088.

By this measure, the Hudson was actually better powered than most of its coastal command contemporaries.

The problem was not raw horsepower.

The problem was that an airliner airframe was being asked to carry loads.

It was never designed for military equipment, armor plating, gun turrets, bombs, depth charges, radar sets, and extended fuel tanks progressively bloated the aircraft beyond its original design envelope.

The high-wing loading made it fast but demanding.

Contemporary aviation journals warned it ought only to be committed to the care of thoroughly competent pilots and was not a machine for the careless or the hamfisted.

The most dangerous weakness was single engine performance when fully loaded.

Pilot’s notes showed a single engine ceiling of just 11,000 ft, marginal when operating at maximum weight in bad weather.

Multiple fatal accidents followed engine failures at low altitude when the remaining engine could not maintain flight.

Crews also complained about a vicious propensity to swing off the runway during takeoff and landing, causing numerous training accidents as pilots transitioned from the dosile Anson.

The cockpit layout was considered inconvenient, and when carrying overload bomb configurations, the Bombay doors could not fully close.

Flight Lieutenant EE Aralin of number 59 squadron offered perhaps the most revealing assessment when his squadron converted from Hudsons to liberators.

He recalled that the general consensus was that everybody would now survive the war.

Whereas before, whilst flying the Hudson, every mission was considered a death sentence.

And yet they kept flying.

The Hudson’s nickname was Old Boomerang because it always came back.

The Hudson’s war extended far beyond the North Atlantic.

On the 8th of December 1941 local time, which was actually several hours before Japanese aircraft attacked Pearl Harbor due to the international dine, 10 Hudsons of number one squadron, Royal Australian Air Force launched from Kotabaru in northern Malaya against Japanese invasion transports.

These were among the earliest Allied air strikes of the Pacific campaign.

In 17 sorties, the Hudsons hit all three Japanese troop ships, setting one ablaze.

Two Hudsons were shot down, three more were badly damaged.

Flight Lieutenant John Leighton Jones reportedly crashed his aircraft directly into a landing craft filled with Japanese soldiers.

Seven months later, over New Guinea, an RAF Hudson demonstrated just how aggressively the type could fight.

On the 22nd of July 1942, pilot officer Warren Cowan was flying a reconnaissance mission when his aircraft was intercepted by 9 Zeros led by Japan’s leading ace, Saburro Sakai.

The Hudson fought for over 10 minutes, using violent maneuvers to keep the fighters at bay.

Sakai was so impressed that decades later in 1997 he formally wrote to the Australian government recommending Cowan beostuously awarded the country’s highest military decoration.

In 2023 the crew received postuous medals for gallantry.

In the Mediterranean four squadrons flew Hudsons from Gibraltar and North Africa through 1943.

Number 161 squadron special duties used Hudsons for clandestine landings in occupied France, inserting and extracting SOE agents.

The Hudson could carry 8 to 10 passengers compared to the Lysanders 3 and could land in 350 yards despite officially requiring more than twice that distance.

The Royal Canadian Air Force operated approximately 219 Hudsons across six squadrons for Atlantic patrols.

The Royal New Zealand Air Force received nearly 100, replacing 1920s era biplanes.

In total, five Allied Air Forces flew the type in combat.

Total Hudson production reached 2,941 aircraft.

By May 1943, the RAF received approximately 1,800 through direct purchase and lend lease.

The type equipped at least 39 RAF squadrons across coastal command, bomber command, and various special duties roles.

The Hudson contract transformed Loheed from a small regional manufacturer into a defense aviation giant.

The company borrowed money, issued new stock, and expanded its workforce from 2,000 to 7,000 to meet British orders.

Within two years, total British aircraft purchases from American firms exceeded $1.

2 billion with the Hudson contract having opened the door.

Today, only one Hudson remains airworthy.

Aircraft 16112, a MarkV, flies with the Royal Australian Air Force Heritage Squadron from Tamora, New South Wales.

Approximately eight others survive in museums worldwide.

Aviation historians have been explicit about the Hudson’s neglected status.

Andrew Thomas writing for a major aviation publication observed that the Hudson’s fighting career extended to all theaters of war, but history seems to have barely acknowledged this pugnacious campaigner.

The reasons for this obscurity are structural.

Coastal command was the RAF’s Cinderella service.

Starved of resources by Fighter Command and Bomber Command priorities.

Anti-ubmarine patrol was unglamorous work compared to the Battle of Britain or the strategic bombing offensive, the Hudson had no single iconic moment.

Its contribution was diffuse, spread across a dozen theaters and dozens of squadrons over six years.

Its identity as a converted airliner and stop gap marked it as something provisional, easily forgotten once purpose-built aircraft arrived.

But during the years when Britain’s survival depended on keeping the Atlantic sea lanes open, when convoys were being savaged by yubot wolfpacks and there simply were not enough aircraft to patrol the vast ocean, the Hudson was there day after day, sorty after sorty.

11-hour patrols over freezing gray water, searching for periscope wakes and oil slicks, bringing crews home despite engines that failed and controls that froze and weather that would have grounded anything less determined.

The progression from Hudson to Ventura to Neptune to Orion to today’s P8 Poseidon, makes it the ancestor of modern maritime patrol aviation, every anti-ubmarine aircraft flying today traces its lineage back to that converted airliner that arrived in Britain in 1939.

They called it underpowered.

They called it a stop gap.

They called it unsuitable for military service.

On the 8th of October 1939, a Hudson of number 224 squadron claimed the first enemy aircraft destroyed by any aircraft operating from the British Isles.

It captured a yubot intact for intelligence exploitation.

On the 8th of December 1941, RAAF Hudson’s attacked Japanese invasion forces off Kotabaru among the earliest Allied strikes of the Pacific campaign.

It sank or helped sink 26 enemy submarines.

And according to operational records from the critical early years of the war, no other coastal command aircraft flew more missions in defense of Britain’s lifeline across the Atlantic.

The Lockheed Hudson was a stop gap, yes, but it was also an adaptable, serviceable aircraft that proved far more capable than anyone expected.