IMAM Ro.37
| Industry | Aerospace, Defence |
|---|---|
| Founded | 1930s |
| Headquarters | Italy |
| Products | Military aircraft, including the Ro.37 reconnaissance biplane |
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The Meridionali Ro.37 Lince (Italian for "Lynx") was an Italian two-seat reconnaissance biplane developed by the Industrie Meccaniche Aeronautiche Meridionali (IMAM). Introduced in 1934, this aircraft featured a hybrid wooden and metal airframe.[1] It was first deployed during the Second Italo-Ethiopian War (1935–1936) and later saw action in the Spanish Civil War (1936–1939). Throughout the Second World War, it operated on nearly all fronts except for those in Russia and over the English Channel.[1] The Ro.37 succeeded the Ro.1 as the primary reconnaissance aircraft within the Italian Army.
Design and development
The Regia Aeronautica issued a competition seeking both a lightweight reconnaissance plane and a heavier model. The requirements for the lighter aircraft included a top speed of approximately 350 km/h (220 mph; 190 kn), endurance of five hours, armament consisting of three machine guns plus a bomb dispenser, armor protection, and the ability to operate from makeshift airstrips. The heavier design was expected to achieve a maximum speed near 325 km/h (202 mph; 175 kn), endurance exceeding 1,300 km (810 mi; 700 nmi), service ceiling of 7,000 m (23,000 ft), climb to 5,000 m (16,000 ft) within nineteen minutes, accommodate three crew members, carry five weapons, feature a high-wing configuration, among other specifications.
The limited-run IMAM Ro.30, an upgraded derivative of the Ro.1 with improved engine performance and a defensive turret, was evaluated but ultimately rejected by the Regio Esercito. This model only managed speeds around 200 km/h (120 mph; 110 kn), endurance of five hours, ascent to 4,000 m (13,000 ft) in twenty minutes, and was armed with three weapons.
Undeterred by the modest reception of the Ro.30, IMAM proceeded to develop the Ro.37, which made its maiden flight in 1933.
This biplane combined wooden and metal construction and accommodated two crew members. It was initially powered by a 560 hp (420 kW) Fiat A.30 R.A. V-12 engine—the same powerplant used in the Fiat CR.32—enabling speeds up to 300 km/h (190 mph; 160 kn) or possibly higher. Performance figures included a service ceiling of 7,000 m (23,000 ft), climb to 3,000 m (9,800 ft) within eleven minutes, and operational range exceeding 1,200 kilometres (750 mi). Armament comprised three machine guns (two fixed forward-firing and one rear dorsal), twelve bombs weighing 15 kg (33 lb) each, along with notable maneuverability. Its design bore more resemblance to the Hawker Hind than to typical light army aircraft, with performance comparable to both the later Westland Lysander and contemporaneous Hawker Hector.
Subsequently, the Ro.37 was equipped with the more reliable 600 hp (450 kW) Piaggio Stella P.IX R.C.40 radial engine; this variant became the predominant production model due to its enhanced dependability.
Ro.45
The Ro.45, the final biplane model produced by IMAM, represented an upgraded iteration of the Ro.37. Its maiden flight occurred on 10 December 1935; however, it never proceeded to mass production.
Operational service
For an extended period, the Ro.37 was the primary aircraft in observation squadrons. During the Second World War, especially in the African campaign, its role expanded to include tactical support and fighter missions. In mid-1935, 103 Squadron received this aircraft and was promptly deployed to Ethiopia amid the Second Italo-Ethiopian War. By December of that year, the squadron relocated to Italian Somaliland, followed by the deployment of four additional squadrons—105, 108, 109, and 110—to the same region. Collectively, these units operated ten Ro.37s alongside 41 Ro.37Bis models. After combat operations ceased, 110 Squadron remained in the area, conducting counterinsurgency operations and reinforcing isolated military posts.
Simultaneously, the Ro.37 saw action in the Spanish Civil War, with an initial batch of ten arriving late in 1936. Estimates suggest that an additional 26 to possibly 58 aircraft were deployed there, undertaking diverse missions. Despite lacking armor, they were employed as assault planes with satisfactory outcomes; some were even modified into single-seat attack fighters. The two-seat variants functioned as heavy fighters tasked with escorting S.81 bombers against Republican I-15 fighters. It remains unclear whether they achieved any confirmed aerial kills.
Pilots generally held a favorable view of the Ro.37, although common criticisms included susceptibility to undercarriage damage and occasional engine issues.
Production continued until 1939, yielding a total of 569 units (237 original plus 332bis). Plans as late as 1940 aimed to equip 17 Squadron with this aircraft type. The Ro.37 remained operational in reconnaissance roles for several years due to the unsatisfactory performance of its intended successor, the Caproni Ca.311.
The Ro.37 also enjoyed considerable export success: ten units were sent to Uruguay, sixteen to Afghanistan, fourteen to Hungary, eight to Austria, and one to Ecuador. Approximately 280 aircraft were active by 1940 across thirty squadrons comprising a total of 215 planes.
Some examples remained in service until at least 1943 and possibly beyond. Despite their vulnerability, Italy lacked sufficient resources during WWII to develop a superior observation aircraft—not even the more advanced IMAM Ro.63 (similar in concept to the Fieseler Fi 156 Storch but offering greater endurance) could be produced in adequate numbers.
Variants
- Ro.37
- Original reconnaissance biplane powered by a 418 kW (560 hp) Fiat A.30 R.A. V-12 engine.
- Ro.37bis
- Enhanced model featuring Piaggio P.IX R.C.40 or Piaggio P.X R. radial powerplants.
- IMAM Ro.43
- Floatplane reconnaissance aircraft developed for use by the Regia Marina.
- Ro.44
- Single-seat fighter floatplane variant designed for the Regia Marina.
- Ro.45
- Updated version of the Ro.37 equipped with an 611 kW (820 hp) Isotta-Fraschini Asso XI R.C.40 engine; maximum speed increased to 325 km/h (202 mph; 175 kn), ceiling improved to 000 m (0 ft), and range extended to 2,250 km (1,398 mi; 1,215 nmi). Intended for long-range reconnaissance and light bombing duties, this sole prototype measured 10.37 m (34 ft) in length with a wingspan of 12.32 m (40 ft) and first flew on 10 December 1935.
Operators
- Regia Aeronautica
- Aviazione Legionaria – operated 36 units
Specifications (Ro.37bis with P.IX engine)
%}See also
Notes
Bibliography
- Angelucci, Enzo and Paolo Matricardi. World Aircraft: World War II, Volume I (Sampson Low Guides). Maidenhead, UK: Sampson Low, 1978. ISBN 0-562-00096-8.
- (in Italian) Bignozzi, Giorgio. Aerei d'Italia. Milano, Edizioni E.C.A 2000
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- Cull, Brian with Frederick Galea. 249 at Malta: Malta top-scoring Fighter Squadron 1941–1943. Malta, Wise Owl Publications, 2004. ISBN 978-99932-32-52-0
- (in Italian) De Marchi, Italo – Tonizzo, Pietro. CANT. Z. 506 "airone"- CANT. Z. 1007 "alcione" . Modena, Mucchi Editorr, 1997. NO ISBN.
- Lua error in Module:Citation/CS1/Configuration at line 2123: attempt to index field '?' (a nil value).
- Green, William. War Planes of the Second World War: Volume Six – Floatplanes. London:Macdonald, 1962.
- (in English) Gunston, Bill. Gli aerei della seconda guerra mondiale. Milano, Alberto Peruzzo Editore, 1984
- Gunston, Bill (2001), The Illustrated Directory of Fighting Aircraft of World War II, Salamander, ISBN 1-84065-092-3
- Marcon, Tullio L'aviazione per il regio esercito Storia Militare magazine July 1995. (in Italian)
- Mondey, David (1984), The Concise Guide to Axis Aircraft of World War II, Chancellor Press, ISBN 1 85152 966 7
- Mondey, David. The Hamlyn Concise Guide to Axis Aircraft of World War II. London: Bounty Books, 2006. ISBN 0-7537-1460-4.
- The Illustrated Encyclopedia of Aircraft (Part Work 1982–1985), 1985, Orbis Publishing
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External links
| Engine | Length | Empty/Max Weight | Speed | Climb to 4000 m | Ceiling | Range |
|---|---|---|---|---|---|---|
| Fiat A.30 R.A. | 8.62 m (28 ft) | 1,563 kg (3,446 lb) / 2,425 kg (5,346 lb) | 325 km/h (202 mph; 175 kn) | 9 min 5 sec | 6,700 m (22,000 ft) | 1,650 km (1,030 mi; 890 nmi) |
| Piaggio P.IX R.C.40 | 8.57 m (28 ft) | 2,040 kg (4,497 lb) / 2,425 kg (5,346 lb) | 320 km/h (199 mph; 173 kn) | 9 min 30 sec | 7,500 m (24,600 ft) | 1,300 km (810 mi; 700 nmi) |
| Piaggio P.X R. | 8.57 m (28 ft) | 2,040 kg (4,497 lb) / 2,425 kg (5,346 lb) | 320 km/h (199 mph; 173 kn) | 9 min 30 sec | 7,500 m (24,600 ft) | 1,300 km (810 mi; 700 nmi) |
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