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Panhard 178

From Alfawiki
Panhard
IndustryAutomotive, Military vehicles
Founded1887
Headquarters
Paris
,
France
ProductsArmoured cars, automobiles

The Panhard 178—officially designated as the Automitrailleuse de Découverte Panhard modèle 1935 and identified internally by Panhard as project number 178—was a sophisticated French 4x4 armoured car designed for reconnaissance missions within the French Army Cavalry units prior to World War II. It accommodated a crew of four and was equipped with a powerful 25 mm main cannon alongside a 7.5 mm coaxial machine gun.

After the Fall of France in 1940, German forces captured these vehicles and incorporated them into their arsenal under the designation Panzerspähwagen P204 (f). Production briefly continued under German supervision following the June armistice. After the war, France recommenced manufacturing with an enhanced model known as the Panhard 178B.

Development

In December 1931, the French Cavalry outlined plans for future armoured fighting vehicles, including a specialized long-range reconnaissance vehicle termed Automitrailleuse de Découverte (AMD). By December 1932, detailed specifications were established: a maximum weight of 4 tons, operational range of 400 km, top speed of 70 km/h, armor thickness between 5 and 8 mm, armed with a 20 mm cannon and a 7.5 mm machine gun.

In 1933, several manufacturers—Panhard among them alongside Renault, Berliet, and Latil—were tasked with developing prototypes. Panhard completed its prototype by October 1933 and unveiled it in January 1934 as the Panhard voiture spéciale type 178. Although it exceeded the weight requirements initially, adjustments made in February 1934 led to its acceptance and it was judged superior to competing models. By late 1934, it was officially adopted as the AMD Panhard Modèle 1935, now fitted with the APX3B turret.

Between June and December 1937, extensive testing revealed reliability issues that prompted numerous enhancements such as adding a silencer and turret ventilation system. The resulting design was highly advanced for its time and maintained relevance well into the 1970s. Notably, it was the first major nation's armoured car to be mass-produced with a full 4x4 drivetrain.

Production

Final assembly and painting took place at Panhard & Levassor’s facility located in Paris’s 13th arrondissement. The armored hulls were prefabricated by subcontracted forges—initially by Batignolles-Châtillon in Nantes, which could produce up to twenty units per month, then from 1940 onward by Firminy. Turret manufacturing was primarily handled by Société française de constructions mécaniques (Cail) in Denain, with installation performed at the Atelier de construction de Rueil (ARL). Turret output lagged behind hull production; by September 1939, there was a backlog of thirty-five turrets awaiting fitting.

Initial procurement began in 1934 with each hull priced at ₣275,000—costlier than contemporary light tanks. Strikes caused delays that postponed first deliveries until February 1937. The initial batch consisted of thirty preseries vehicles that featured some design variations compared to subsequent models.

Further orders expanded production: eighty vehicles were ordered in September 1935 but were not delivered until early 1939; additional orders included forty and thirty-five units provided before WWII commenced; another batch of eighty was delivered by mid-1939. By September 1939, total deliveries reached 219 vehicles despite ongoing production backlogs.

Production accelerated during wartime: monthly deliveries increased from nine units in September 1939 to thirty by May 1940, culminating in a total of 339 standard AMD 35 vehicles supplied to France. Variants included twelve radio command versions ordered between 1937 and 1938 (delivered late in 1939), eight colonial adaptations, and one hundred twenty-eight modified vehicles intended for North African deployment. Additional orders pushed overall production to 491 units by June 1940, with ten more completed before France’s capitulation. Under German control post-armistice, another one hundred seventy-six vehicles were assembled from prefabricated components, bringing the grand total to seven hundred twenty-nine.

Before the war, production targets aimed for thirty units monthly; wartime demands raised this goal to sixty per month by late 1940. Total orders reached one thousand one hundred seven by April of that year. However, strategic reassessments led by Supreme Commander Maurice Gamelin after Fall Weiss concluded that lightly armored reconnaissance vehicles had become obsolete on modern battlefields. Consequently, plans were made to phase out the Panhard 178 in favor of the more heavily armored Panhard AM 40 P starting from spring 1941.

Design

Conceived for extended-range scouting missions, the Panhard 178 was engineered to be lightweight and compact, with overall dimensions of long, wide, and high (the hull height being 1.65 m). Its engine compartment was low-profile, housing a Panhard ISK 4FII bis V4 engine with a displacement of 6332 cc, delivering 105 hp at 2000 rpm. This compartment was separated from the crew area by a fire-resistant bulkhead. The vehicle’s armor protection featured a sizeable turret with frontal armor thickness of 26 mm and side armor of 13 mm, complemented by hull plates secured by bolts and rivets ranging between 7 and 20 mm in thickness. The total weight came to approximately 8.2 metric tonnes.

In terms of mobility, the Panhard 178 excelled for its period: it could reach a maximum speed of , maintain a cruising speed of , and had an operational range near , powered by two fuel tanks holding 120 and 20 litres respectively. Nonetheless, its off-road capabilities were constrained due to the use of leaf spring suspension combined with four-wheel drive, limiting off-road velocity to 42 km/h and allowing it to ford water or cross trenches up to 60 cm in depth.

Positioned at the front was the driver’s station, equipped with an eight-speed transmission and steering wheel. A distinctive "dual drive" feature enabled the assistant driver—seated behind the engine facing rearward—to maneuver the vehicle backward at speeds up to 42 km/h using all four off-road gears. In command variants, this second driver also functioned as the radio operator, managing short- or medium-range radio equipment. Approximately one out of every twelve vehicles was configured specifically as a long-range radio communications car.

The APX3 turret, electrically traversed, was notably roomy compared to other French armored vehicles of that era, accommodating two crew members beneath a large double hatch. The commander occupied the right side while the gunner sat on the left; both had basic turret baskets and multiple vision devices including Gundlach-type periscopes on later versions as well as PPL.RX.168 episcopes.

Armament

Originally planned to mount a new 20 mm cannon, the design shifted when that weapon failed to be developed. The initially considered 37 mm Modèle 16 gun—common on armored cars—was dismissed due to inadequate anti-armor effectiveness. Instead, the chosen armament was the 25 mm SA 35: a shortened L/47.2 variant derived from the standard French Hotchkiss modèle 34 antitank gun, fitted with an L711 sighting system. To compensate for the reduced barrel length, ammunition used heavier propellant charges resulting in a slightly increased muzzle velocity of 950 m/s. This weapon could penetrate around 50 mm of armor when firing tungsten rounds; however, its relatively light projectile weighing only 380 grams frequently ricocheted off sloped armor surfaces. German tanks’ vertical armor plates were vulnerable to penetration up to roughly 800 meters, though multiple hits—sometimes as many as fifteen—were often necessary to cause ignition inside enemy vehicles. The Panhard carried a total ammunition load of 150 rounds for this main gun.

The secondary armament optionally included a coaxial Reibel machine gun chambered in 7.5 mm with an ammunition supply of 3,750 rounds, among which were 1,500 armor-piercing bullets. An additional spare machine gun was stored next to the driver’s seat and could be mounted on top of the turret for air defense purposes. Magazines were kept inside the fighting compartment as well as on the main access door.

Shortcomings and further improvements

Field use exposed several deficiencies: a delicate clutch mechanism, slow turret traverse speed, cramped interior space, unreliable radio systems, limited off-road performance, and noisy braking systems. On the positive side, it proved dependable, easy to handle on paved roads, and featured a comparatively quiet engine—qualities that were essential for reconnaissance duties.

Throughout its production run, various refinements were introduced to address these shortcomings. Early production vehicles had basic periscopes and vision slits protected by armored shutters; drivers relied on vision slits rather than episcopes. These initial models lacked exhaust silencers and had semi-circular cut-outs on their wheel covers. Starting with the fourth production series (approximately vehicle number 111), enhancements included an armored cover over the turret ventilator, addition of a "Panhard" factory badge on the front hull plate, and a more subdued camouflage scheme blending brown and bronze green hues. From vehicle number 270 onwards, storage boxes were installed on rear fenders which altered the silhouette of the engine compartment. Later turret variants also incorporated a rear-facing episcope for commanders instead of relying solely on vision slits.

Operational history

The initial batch of nineteen Panhard 178 armoured cars was introduced into service with the 6e Cuirassiers in April 1937. By the time Second World War hostilities commenced, a total of 218 vehicles had been distributed among eleven squadrons.

In early 1940, the unit designated 21e Escadron d'AMD 35, originally intended for deployment in Finland during the Winter War, was reassigned to Narvik to support Norwegian forces during Weserübung. This squadron, formerly known as 4e GRDI, operated thirteen Panhard 178s.

At the onset of the Battle of France on 10 May 1940, approximately 370 Panhard 178s were operational. These armoured cars were primarily utilized for reconnaissance within mechanised and motorised formations and were considered among the most advanced reconnaissance vehicles worldwide at that period.

The Cavalry’s three armoured divisions, called Divisions Légères Mécaniques (DLM), each maintained a complement of forty armoured cars plus reserves, amounting to a total of 144 vehicles. Likewise, the Light Cavalry Divisions, or Divisions Légères de Cavalerie (DLC), deployed squadrons equipped with twelve Panhards plus reserves, summing up to 85 vehicles.

In addition to Cavalry units, Infantry reconnaissance groups (GRDIs) assigned to motorised infantry divisions also fielded Panhard 178s. Seven such GRDIs were equipped with sixteen vehicles each, adding up to 112 units.

On 10 May 1940, excluding colonial forces, the total number of delivered Panhard 178s reached 378. Some were retained as matériel reserves or allocated for training purposes. During the invasion, emergency formations such as the 32e GRDI with five vehicles and the hastily assembled Infantry armoured division 4e DCR with 43 Panhards were created.

The DLMs employed their Panhard vehicles for strategic reconnaissance missions; for instance, during the Battle of the Netherlands, 1DLM advanced more than 200 kilometers in under 32 hours. After engagements with German armoured cars and an unsuccessful attempt to support infantry at the Moerdijk bridges, they withdrew following an attack by Stuka dive bombers.

Other DLM units confronted German forces after the fall of Fort Eben-Emael, conducting delaying operations against enemy reconnaissance elements until the Battle of Hannut—the largest tank engagement of the campaign. The Panhard's robust armour generally provided superior protection compared to German armoured cars armed with lighter weaponry.

Acknowledging its tactical utility, German forces captured and repurposed no fewer than 190 Panhard 178s—many still brand new—for reconnaissance duties during Operation Barbarossa in 1941 under the designation Panzerspähwagen P204 (f). Of these captured vehicles, 107 were lost during that year. Certain radio-equipped variants carried the designation Panzerspähwagen (Funk) P204 (f). By May 1943, around thirty remained active on the Eastern Front, some having been fitted with additional spaced armour.

Following liberation, French forces’ 1e Groupement Mobile de Reconnaissance also operated modified versions of the Panhard 178 alongside a variety of other vehicle types.

Radio vehicles

Designed for extensive strategic reconnaissance missions, Panhard units required reliable long-distance radio communication to transmit intelligence ahead of advancing main forces. Approximately one out of every twelve vehicles was configured as a specialized radio "command" model (Poste Commande) featuring a fixed turret without armament and equipped with an ER27 radio set capable of ranges between 80 and 150 kilometers, supplemented by two ER26ter sets providing up to 60 kilometers range for squadron-level communications.

An initial procurement order for twelve PC vehicles was placed in 1937 and extended in 1938 to a total of twenty-four by December that year. Although deliveries were scheduled to begin in February 1939, the first units were only delivered in October, followed by seventeen in November and six more in December. These vehicles received retrofitting with ER27 sets at Fort d'Issy. As this quantity proved insufficient to equip all units adequately, an additional order for 150 PCs was issued on 15 April 1940, increasing the planned total to 174; however, none were completed before the signing of the armistice.

North African variant

Between 14 and 29 October 1936, the initial Panhard 178 prototype underwent trials conducted by the 6e Cuirassiers in Morocco, successfully traversing approximately three thousand kilometres across desert and mountainous landscapes. This performance led to its approval for desert deployment on 15 January 1937, accompanied by suggestions for modifications such as a lighter turret.

The North African military required two types of reconnaissance armoured cars: a light model (the Laffly S15 TOE) and a heavier one, the Panhard 178. Early upgrade plans included equipping the vehicle with 37 mm and later 47 mm guns; however, on 14 January 1939, amid escalating international tensions, a variant known as the AMD 35 type Afrique française du Nord was adopted. This version closely mirrored the standard design but incorporated a reinforced radiator tailored for high-temperature desert conditions.

Orders were placed on 3 June 1938 for twenty and twelve units respectively, followed by a third order on 3 February 1939 for ninety-six vehicles intended to outfit eight African squadrons comprising sixteen cars each. The first order received confirmation on 26 May 1939. Production commenced in December but was hampered by a shortage of specialized radiators—161 units were ordered only on 10 October. Radiator manufacturing began in mid-May 1940, resulting in these vehicles constituting the majority of Panhard output: seventy-eight were delivered that month. By 7 June, out of the 128 ordered, seventy-one had been supplied; two were completed but remained in factory storage, and thirty-nine hulls awaited turret installation. At least forty-one more were delivered before the armistice, bringing the minimum total of AMD 35 AFNs to one hundred twelve.

None of these vehicles were dispatched to North Africa; instead, they were allocated to newly formed or reconstituted French units, notably the 10e Cuirassiers, part of Charles de Gaulle's 4e DCR.

Colonial model

On 14 September 1938, an order was placed for four vehicles intended for colonial service in Indo-China, outfitted by ARL with the smaller single-man APX5 turret—similar to that on the AMR 35 ZT2—armed with a 25 mm cannon and a 7.5 mm machine gun. These vehicles had a crew of three. Two units were delivered in June 1939, followed by two more in July. These initial four were shipped to Indo-China on 12 October; at least one was captured by Japan. A second batch of four colonial Panhard 178s was ordered on 10 June 1939; one arrived in December 1939, with the remaining three delivered in January 1940, totaling eight vehicles. The final four stayed in France during the German invasion and were issued to the army in June despite lacking turrets; some were later covertly employed by Vichy forces after the armistice.

Tank Destroyer version

The effectiveness of the 25 mm gun was limited to short distances. On 14 January 1939, proposals were made to equip the Panhard with the more potent 47 mm SA 35 gun; however, priority was given to tanks still using the SA 34 weapon system such as the Char B and early Char D2 models. By autumn of that year, development began on tank destroyer variants to compensate for limited motorized anti-tank capabilities. In April 1940, Panhard introduced the Voiture spéciale 207, a Panhard 178 modified with a rear-facing 47 mm SA 37 gun.

During the May crisis and due to shortages of APX3 turrets—caused by Cail being overrun—most vehicles were delivered as "turretless AMDs." An emergency initiative produced a new turret designed by Engineer Joseph Restany, capable of mounting the standard-issue 47 mm SA 35 gun. Completed on 31 May, this octagonal turret featured welded armor plates of 25 mm thickness supplemented by an additional spaced appliqué of 13 mm at the front and had an elevated rear section to facilitate gun operation. It lacked a rear hatch and electrical rotation mechanisms; turret movement was manual and no machine gun was installed.

Only one vehicle was completed and tested between 5 and 6 June. Although there were plans to manufacture forty units starting from 11 June at a rate of four per day—and subsequently thirty-five per month—production halted after Paris was declared an open city on 10 June and factory evacuation commenced on 12 June. The sole Voiture 47 was assigned to 1er RAM on 6 June and notably destroyed two German "heavy tanks" near Etignie on 15 June. It was ultimately destroyed by its crew at Cosnes-sur-Loire on 17 June after being unable to cross the Loire river while carrying heavy equipment.

On 2 June, there were intentions to equip "turretless AMDs" with either a turret-mounted or superstructure-mounted gun—either a 47 mm SA34 or a 25 mm cannon—within armor plating ranging from sixteen to twenty millimetres thick. Photographic evidence confirms at least one vehicle featured such a superstructure, although its armament remains uncertain. Some may have been fitted with protective shields for machine guns, but most were issued as hulls without turrets or armament installations.

Alterations by Germany, Vichy France, and Italy

Following 1941, Germany converted 43 Panhard 178 vehicles into specialized railway protection units known as Schienenpanzer. These were fitted with unique wheels designed for rail travel and featured prominent radio frame antennas.

According to the armistice agreement, the Vichy regime deployed 64 Panhards primarily from the May–June production series for police duties, removing their main guns and substituting an extra machine gun. Engineer J. Restany, operating under the pseudonym "J-J. Ramon," secretly manufactured 45 new turrets starting in April 1941. These turrets were armed either with a 47 mm SA 35 (approximately twenty units) or a 25 mm cannon to outfit concealed hulls. The turret armor consisted of vertical plates measuring 20 mm and a 10 mm thickness on top, included a rear access hatch, and later incorporated a 7.5 mm FM 24/29 machine gun alongside the primary weapon. By January 1942, all turrets had been completed. Some hulls and turrets were hidden or discarded following Germany's occupation of all France in November 1942, although certain vehicles were utilized by the German Sicherungs-Aufklärungs-Abteilung 100. There is also evidence that some may have been employed by resistance forces during the summer of 1944.

In 1944, the German forces reconstructed several of the 34 captured Panhards by equipping them with either the 5 cm KwK 38 L/42 or 5 cm PaK 38 L/60 guns mounted in open-topped turrets for use in occupation roles. Meanwhile, the Italian Army seized two Panhards in November 1942 and operated them until September 1943.

Panhard 178B

Towards the end of 1944, Fives Lille developed the FL1 turret featuring a cylindrical "camembert" design to house the larger 75 mm SA 45 L/32 cannon. This turret, combined with a newly designed four-cylinder engine and EM3/R61 radio equipment, comprised the Panhard 178B, manufactured at Firminy. An initial order for 150 vehicles was placed on January 5, 1945, and reaffirmed on July 31. Prior to commencing production, it was decided to equip these units with the smaller caliber 47 mm SA35 gun accompanied by a machine gun instead. Ultimately, a total of 414 Panhard 178Bs were produced, raising total Panhard 178 output to 1,143 units.

Although earlier variants are occasionally labeled as Panhard 178"A," this naming was not used during their service period. The B model operated within France as well as overseas territories such as Syria, Tahiti, Madagascar, and Vietnam. The final French deployment occurred in Djibouti in 1960 with the 15e Escadron Blindé d'Infanterie de Marine; Syria maintained operational use of these vehicles during the February 1964 uprising in Damascus.

External links

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