IMAM Ro.43

IMAM

Industry	Aerospace, Defense
Founded	1923
Headquarters	Italy

The IMAM Ro.43 was a single-float Italian reconnaissance seaplane that served with the Regia Marina from 1935 until 1943.

Design and development

In response to a 1933 request by the Regia Marina for a catapult-launched reconnaissance aircraft to be deployed by its Maritime Reconnaissance Squadrons aboard naval vessels, the Ro.43 was developed. The specification required a top speed of 240 km/h (149 mph), a range of 600 km (370 mi), or an endurance of approximately 5.5 hours. Competitors included the Piaggio P.18, Piaggio P.20, CMASA MF.10, CANT Z.504, and Macchi C.76.

The Ro.43 originated from the design of the Ro.37 Lince reconnaissance aircraft, created by the same engineer, and it made its maiden flight in 1934. Constructed with a framework of steel tubing and wood, it was covered with light alloy and fabric materials. This two-seat biplane featured folding gull-shaped upper wings and inverted gull lower wings, was lightly armed, and could reach speeds near 300 km/h (185 mph) with a range exceeding 1,000 km (620 mi). These capabilities surpassed the initial requirements, securing its selection as the winning design.

However, the Ro.43 suffered significant drawbacks. Its lightweight construction rendered it fragile for maritime buoyancy, and it exhibited poor handling on water surfaces. Consequently, it was common for the aircraft not to be recovered at sea after launch, necessitating a return to land for landing.

Operational history

File:IMAM Ro.43.JPG

Ro.43 preserved at the Italian Air Force Museum

Thanks to its extended endurance, seaplanes like the Ro.43 remained valuable assets within the confined Mediterranean theater. During the early stages of World War II, six Ro.43s launched from light cruisers contributed to locating the British fleet in the battle of Calabria. One such aircraft, launched from the cruiser Eugenio di Savoia, maintained visual contact with HMS Warspite during an exchange of fire involving the British battleship and the Italian battleship Giulio Cesare, before being intercepted by a Sea Gladiator from HMS Eagle.

In late 1940, a solitary Ro.43 deployed by the heavy cruiser Bolzano was the first to detect the British fleet at the outset of the battle of Cape Spartivento at 9:45 am, while another seaplane from Gorizia located a British convoy at 11:45 am. British Blackburn Skuas launched from HMS Ark Royal claimed to have downed one seaplane—likely an Ro.43 operating from the battleship Vittorio Veneto—following an unsuccessful bombing attempt on Italian naval forces. The performance of Ro.43s during this engagement received commendation from Italy’s supreme command.

Another Ro.43 launched by Vittorio Veneto spotted a British cruiser squadron near Gavdos island at 6:35 am during operations preceding the Battle of Cape Matapan on March 28, 1941.

During the Second Battle of Sirte, a cruiser-based Ro.43 signaled the presence of a British convoy by deploying flares, while another seaplane from battleship Littorio assisted in directing Italian fleet fire against British forces before disengaging at 17:24.

Ro.43s continued to participate in shipborne missions as late as June 1942 during attacks on the Harpoon convoy; during this action one Italian seaplane was shot down by a Bristol Beaufighter based in Malta.

At World War II’s outset, approximately 105 Ro.43s were operational—sufficient to equip Italy’s major surface warships—but demand soon arose for an improved aircraft type, possibly a navalized fighter variant. This led to limited production of a naval version of the Reggiane Re.2000, capable of catapult launches but lacking floats, requiring either land base recovery or ditching at sea similar to British CAM ship operations with Hawker Hurricanes. Despite folding wings enabling stowage aboard ships—usually limited to two aircraft—the modest recovery options and limited naval aviation experience curtailed their combat deployment effectiveness.

Between roughly 200 and 240 units were manufactured up until 1941, with about 48 still in service by 1943.

In the late 1940s, five Ro.43s operated within the Spanish Air Force out of Mallorca after having been interned on Spanish soil during World War II.

Operators

Template:Country data Kingdom of Italy

• Regia Marina
• Regia Aeronautica

Template:Country data Spanish State

• Spanish Air Force

Further reading

• Lembo, Daniele Officine Meccaniche Meridionali, Aerei nella storia magazione, Delta editions, Parma, oct-nov 2003 (in Italian)

External links

• Imam Ro 43(in Italian)
• Detailed profile of the Ro.43 by the Italian Air Force(in Italian)