Specification A.39/34 asked for an army co-operation aircraft with excellent low-speed handling and short-field performance, good downward visibility and the ability to operate from rough strips near the front. Westland’s Arthur Davenport and Teddy Petter approached it as an exercise in aerodynamic slow flight rather than raw speed.

Their answer combined a thick, high-set wing with full-span automatic leading-edge slats and slotted flaps that deployed together. The slats opened by themselves as the airflow slowed, delaying the stall and letting the aircraft mush along under control at speeds that would have dropped a conventional design out of the sky. The Lysander could take off in a couple of hundred yards and land almost as short.

Petter went on to design the English Electric Canberra and Lightning; the Lysander was his first production aircraft, and its obsession with a single design problem — solved completely — is recognisably the work of the same restless engineering mind.

Westland followed a house tradition of naming aircraft after figures from classical antiquity beginning with the letter L — hence Lysander, after the Spartan commander who won the Peloponnesian War at sea. To the airmen who flew it the classical grandeur quickly gave way to the affectionate “Lizzie.”

The reputation cut both ways. Ground crews and pilots admired the Lysander’s docility, its huge flaps and its ability to get into and out of tiny fields. But as a combat aircraft over a modern battlefield it was hopelessly vulnerable, and the men who flew it in 1940 knew it. The nickname carried both fondness and a certain gallows humour.

In May and June 1940 army co-operation Lysanders were thrown against the German breakthrough, attacking columns and spotting for guns in daylight and without effective fighter escort. Against modern flak and Bf 109s the losses were catastrophic; the RAF Museum notes that only a fraction of the Lysanders dispatched to France returned.

The disaster discredited the whole pre-war doctrine of the slow army co-operation aircraft loitering over the front. The Royal Air Force turned instead to fast fighters like the Mustang for tactical reconnaissance. The Lysander’s front-line career as designed was effectively over within weeks — which makes its later fame all the more improbable.

The wing carried automatic Handley Page-type slats along its full span. As the angle of attack increased and airflow slowed, suction opened the slats automatically, re-energising the boundary layer and delaying the stall well beyond the point at which a plain wing would have let go.

Linked to the slats were large slotted flaps. Deployed together, the two devices transformed the wing’s lift at low speed. Test pilots reported the Lysander could be flown fully controlled at around 55–65 mph, and its landing run — critical for the secret fields of occupied France — could be held to a few hundred yards on grass.

This is why an aircraft with unremarkable top speed became irreplaceable: no other Allied aircraft combined two seats, useful range and the ability to reliably use an unlit farm field the size of a couple of football pitches.

As an army co-operation aircraft the Lysander was lightly armed: two fixed .303 in Browning machine guns firing forward, one mounted in each wheel spat, plus one or two .303 in guns on a flexible mount for the observer in the rear cockpit.

Small stub wings could be attached to the undercarriage spats to carry light bombs or supply containers, and message pick-up and drop gear was fitted for liaison work. None of this made the Lysander a serious combat aircraft — against fighters the armament was token — but it was adequate for policing and colonial duties, where the type served for years.

The contrast with the special-duties machines is telling. On the SD Lysanders the guns and racks were simply deleted: in the role that made the aircraft famous, its only real weapon was invisibility — matt-black paint, a moonless approach, low speed and the ability to be on the ground and gone before anyone could react. It is a rare aircraft whose most celebrated version carried no weapons at all.

The Mk I used the Bristol Mercury XII, a proven nine-cylinder poppet-valve radial of about 890 hp. The Mk II switched to the Bristol Perseus XII, one of Bristol’s sleeve-valve radials, of roughly 905 hp. The definitive Mk III returned to the Mercury family with the Mercury XX or 30 of around 870 hp.

All were air-cooled radials well suited to a rugged field aircraft: simple to maintain, tolerant of rough handling and forgiving of the dust and grass strips the Lysander was built to use. The relatively modest power was more than enough for such a light, high-lift airframe.

The Lysander was the first production design associated with W.E.W. “Teddy” Petter, who would go on to lead the design of the English Electric Canberra jet bomber and the Lightning interceptor, and later the Folland Gnat.

Seen in that light the Lysander is a fascinating first statement: an aircraft that solves one clearly defined problem — controlled slow flight from tiny fields — more thoroughly than any contemporary. The single-mindedness that produced its self-adjusting wing is the same quality that later produced some of Britain’s most distinctive jets.

Westland had a settled tradition of naming its aircraft after figures from classical antiquity whose names began with the letter L: Widgeon and Wapiti gave way to Lysander, and later designs continued the theme. Lysander himself was the Spartan admiral whose naval victory finally ended the Peloponnesian War — an odd, grand namesake for a slow-flying army spotter.

There is a small irony in it. The aircraft named for a great naval commander earned its fame not in any battle but in a stealthy, unarmed transport role its designers never imagined. The classical name endures, but it is the humble RAF nickname — “Lizzie” — that captures how the airmen actually felt about the machine.

The Lysander did not found a dynasty of aircraft; its specific niche — the fixed-wing army co-operation machine — was swept away by fast reconnaissance fighters and, decisively, by the helicopter. In that sense it was a technological dead end, the last and finest of a line rather than the first of a new one.

But its influence on memory is enormous. The Lysander fixed in the public imagination the very idea of the clandestine air pick-up — the lone aircraft on the moonlit field — that later special-operations aviation, from the Second World War to the present, would repeat in other forms. Every time a special-forces aircraft slips into hostile territory to land or lift a team by night, it is flying, in spirit, a mission the black Lysanders of 161 Squadron pioneered.

A special-duties sortie began with a coded BBC message confirming the operation to the reception committee in France. The pilot flew alone, navigating by dead reckoning and by recognisable rivers, coastlines and moonlit landmarks, since there were no navigation aids over enemy territory.

At the field the committee laid out a small flare path: three torches in an L, sometimes a fourth, switched on only when the aircraft was heard. The pilot landed along the long arm of the L, turned at the corner and taxied back. Outgoing and incoming passengers — and mail, and packages — were exchanged in minutes with the engine running, and the Lysander was airborne again before any German patrol could react.

It was flying of extraordinary precision and nerve, and the Lysander’s docile slow-speed handling was what made it survivable at all.

The army co-operation concept assumed a permissive sky: an aircraft could loiter over the front line, spot for the guns and drop messages because enemy fighters and flak were manageable. By 1940 that assumption was dead.

A Lysander over the battlefield was slow, unarmoured and lightly armed, an easy target for the Bf 109 and for concentrated light flak. No amount of clever slow-flight engineering could change that. The lesson — that tactical reconnaissance needed speed and the ability to escape — pushed the RAF towards fast types like the Mustang for the role.

Clandestine flights to occupied Europe were run from RAF Tempsford in Bedfordshire, with Lysander operations flying forward to RAF Tangmere on the south coast to shorten the Channel crossing. No. 138 Squadron pioneered the work; in February 1942 No. 161 Squadron formed and took over the Lysander pick-up role.

No. 138 concentrated increasingly on parachuting agents and supplies from larger aircraft such as the Halifax and Whitley, while No. 161’s Lysander flight specialised in the physical landings and pick-ups. Together they formed the RAF’s aerial link to the Resistance.

No reliable unit cost or cost-per-flight-hour figure survives for the Lysander in the way it does for post-war types: wartime procurement was not accounted or published the same way, and any single number would be misleading.

What can be said is that the Lysander was cheap by the standards of front-line combat aircraft — a light airframe with a single medium-powered radial — which is part of why it could be diverted to secondary roles rather than scrapped. As a rough, clearly flagged illustration, operating a preserved radial-engined warbird of this size today is often estimated in the region of £2,000–4,000 or more per flying hour once maintenance, insurance and fuel are counted; that is a modern warbird estimate, not a historical figure.

The Lysander’s place in history rests almost entirely on its second career. It is remembered not as a successful army co-operation aircraft — it was not — but as the machine that physically connected Britain to the Resistance, night after night, at enormous personal risk to its pilots.

That legacy is why a genuine special-duties airframe is preserved in No. 161 Squadron black, why the story recurs in books and films about the secret war, and why the ungainly “Lizzie” is remembered with a respect its specifications alone would never have earned.

In the army co-operation role the Lysander was a two-seater for a reason. Behind the pilot sat an observer whose job was to read the battlefield — to spot enemy movements, register targets for the artillery, take photographs and pass corrections back to the guns.

The high wing and deep glazed rear cockpit gave that observer an excellent downward view, and the whole airframe was arranged around his task. When the type was re-tasked to special duties the rear cockpit changed its purpose entirely, carrying not an observer but the agents and mail that made the Lysander famous — but the roomy, well-sighted back seat that made both roles possible was the same.

The special-duties Lysanders were painted overall matt black to disappear against the night sky, with subdued or minimal markings. The clean, unarmed airframe carried the large jettisonable belly tank and the external boarding ladder that are the visual signatures of the type.

It is a striking transformation. The standard Lysander, in day camouflage with its guns and stub-wing bomb racks, looks every inch the 1930s army co-operation aircraft. The SD machine, black and stripped and fitted for range, looks like exactly what it was: a purpose-built instrument of the secret war.

The navigation problem of the moon flights was formidable. There were no radio beacons over occupied France and nothing to give away the aircraft’s position, so the pilot navigated by dead reckoning — heading, speed and time — corrected against features he could actually see by moonlight: coastlines, the silver of rivers, the shapes of towns and woods.

Operations were flown only around the full moon, which is why the special-duties squadrons were nicknamed the “moon squadrons.” Even then, finding a specific small field marked by a few shielded torches, on a single pass, deep in enemy territory and alone, was flying of a very high order — and the reason so few aircraft could have done the job at all.

For the agents, the Lysander was often the most frightening and the most hopeful moment of a mission — the point at which they physically crossed into or out of occupied Europe. The climb up the fixed ladder into the cramped rear cockpit, the few minutes on the ground with the engine running, the sudden lift into the dark: these are the details that recur in the memoirs of those who were carried.

That human dimension is why the Lysander’s fame has lasted. It is remembered not as a machine but as a lifeline — the aircraft that came, against the odds, on the right night, and took you home.

First came confirmation. An agent in the field would request a pick-up through wireless traffic to London; if approved, the operation was signalled back — famously, sometimes via a coded phrase in the BBC French service broadcasts — telling the reception committee which night to expect the aircraft.

On the night, the Lysander flew forward from Tempsford to Tangmere to top up fuel and shorten the sea crossing, then set out alone across the Channel. Over France the pilot navigated to the map reference by moonlight. The reception committee, hearing the engine, switched on an L of shielded torches and flashed a recognition letter in Morse.

The pilot answered, landed along the flare path, taxied back to the corner and held the aircraft with the engine running. Passengers climbed down and up the fixed ladder, packages were swapped, and within a few minutes the Lysander was accelerating back into the dark. Everything depended on speed, silence and the aircraft’s ability to use the field at all.

RAF Tempsford in Bedfordshire was one of the most secret airfields in Britain, home to the special-duties squadrons that supplied the Resistance. Disguised and heavily guarded, it was the base from which agents and stores left for occupied Europe.

For the Lysander pick-ups, aircraft staged forward to RAF Tangmere near the south coast, where a small cottage served as the operations base for the moon-period sorties. From there the Channel crossing was as short as possible, leaving the maximum fuel and darkness for the deep work over France.

Canada was more than an operator: National Steel Car in Ontario built the Lysander under licence, and the Royal Canadian Air Force used the type at home for training, coastal patrol and target towing. That production line is why several of the best-preserved and airworthy Lysanders today are Canadian.

Across the Commonwealth the Lysander turned up wherever a rugged, field-capable liaison and army co-operation aircraft was useful: with Australian and South African forces, on the Burma front with British and Indian units, and in the skies over East Africa and the Western Desert. It was rarely the decisive aircraft, but it was reliably a useful one.

The moon-squadron story has been retold so often, in memoir and film, that it can slide into legend. The honest record is more impressive than any myth: real pilots, flying a real and rather ordinary aircraft, made hundreds of clandestine landings in occupied territory and brought people home.

It is worth being equally honest about the other end of the story — the slaughter of the army co-operation Lysanders in 1940. Holding both truths together, the failure and the triumph, is the only fair way to remember the type. The Lysander was not a wonder-weapon; it was an aircraft that found, almost by accident, the one job in the world it was perfectly suited to do.

The Lysander’s most instantly recognisable feature is its heavy, fixed, deeply spatted undercarriage — the “trousers” that enclosed each mainwheel. Far from being mere fairings, the spats were structural and immensely strong, sprung to soak up the punishment of repeated landings on rough grass and farm fields.

Cleverly, each spat also housed one of the aircraft’s two forward-firing .303 in Browning machine guns, and could carry a small stub wing for light bombs or supply containers. It is a neat piece of design: the same structure that made the Lysander rugged enough for its field role also carried its modest armament and stores.

The wing was set high and braced to the fuselage, a layout chosen deliberately for the army co-operation role: it gave both crew members an excellent downward view, essential for spotting, photography and artillery observation. The distinctive reverse-tapered planform, broad at the root, housed the full-span slats and the linked flaps.

For the pilot, the combination of a high wing, a tall undercarriage and a nose-up ground attitude took some getting used to, but the reward was superb visibility over the side and down — and, when the flaps and slats were deployed, a docile, floating approach that made the short, precise landings of the secret war achievable.

The Lysander seated its two crew in tandem under a long glasshouse canopy: the pilot forward, the observer or gunner behind with his flexible gun and, later in special-duties aircraft, the space that carried agents. The cockpit was roomy by the standards of the day and reasonably warm, a real consideration on long night flights across the Channel.

Controls were conventional but the aircraft’s slow-flight behaviour was anything but ordinary: pilots had to learn to trust the slats and flaps and to fly approaches far slower than instinct suggested. Once mastered, the Lysander was widely liked — forgiving, stable and honest, exactly the qualities you want in an aircraft you must land in the dark on a strange field.

Lysanders were built at Westland’s Yeovil works and, under licence, by National Steel Car in Ontario, with total production commonly given as around 1,786 across all marks — a figure that varies between sources and should be treated as approximate.

Attrition, scrapping and the passage of time have left only a modest number of survivors, which is what makes the handful of preserved and airworthy examples so valuable. The single most significant is the RAF Museum’s R9125, a genuine special-duties airframe; between it, the Shuttleworth machine and the Canadian survivors, enough of the type remains for each generation to see, in metal, the aircraft behind the legend.