| 词条 | IMAM Ro.51 | |||||||||||||||
| 释义 |
The IMAM Ro.51 was an Italian fighter aircraft that first flew in 1937. It was designed for the 1936 new fighter contest for the Regia Aeronautica, with practically all the Italian aircraft builders involved. DesignThe aircraft, designed by the engineer Galasso, was a single-seat, monoplane fighter, of mixed construction (the wings were made of wood), and initially with a fixed undercarriage. The engine was standard for this generation of fighters, an 840 hp Fiat A.74 RC 38 radial powering a three-blade propeller. The fixed undercarriage, meant that the maximum speed was only 467 km/h. It was armed with two Breda-SAFAT 12.7 mm machine guns. DevelopmentOn June 1938 the first prototype, initially fitted with a very small tail, was tested and found inferior to the Macchi C.200 and Fiat G.50. It was overall a poor aircraft. The trials to re-engineer the wing came too late and no orders were made. The second prototype Ro.51/1, was converted into a fighter floatplane. Like the Ro.44 it had a large central float and two smaller ones under the wings. The maximum speed dropped to 430 km/h, but endurance was increased to 1,200 km. Unfortunately during a trial one of the wings suddenly sank in the water. The rest of the aircraft swiftly followed, and the loss of this prototype meant the end of the program. Although performance was apparently fairly good, the project was overall a failure, especially in the early aspects, even if it was not too different from the Fokker D.XXI. But with so many other superior machines also involved, waiting for the problems the Ro.51 had to be fixed was not an option. Operators
Specifications (Ro.51 first prototype){{aircraft specifications|plane or copter?=plane |jet or prop?=prop |ref= The Complete Book of Fighters [1] |crew=1 |capacity= |length main= 7.46 m |length alt= 24 ft 5¾ in |span main= 9.78 m |span alt= 32 ft 1 in |height main= 2.71 m |height alt= 8 ft 10⅞ in |area main= 16.4 m² [2] |area alt= 176 ft² |airfoil= |empty weight main= 1,663 kg |empty weight alt= 3,666 lb |loaded weight main= 2,092 kg |loaded weight alt= 4,612 lb |useful load main= |useful load alt= |max takeoff weight main= |max takeoff weight alt= |more general= |engine (prop)=Fiat A.74 R.C.38 |type of prop= 14-cylinder radial engine |number of props=1 |power main= 618 kW |power alt= 828 hp |power original= |max speed main= 489 km/h at 4,500 m |max speed alt= 264 knots, 304 mph |cruise speed main= 444 km/h [2] |cruise speed alt= 240 knots, 276 mph |stall speed main= |stall speed alt= |never exceed speed main= |never exceed speed alt= |range main= 1,200 km [2] |range alt= 648 nm, 745 mi |ceiling main= 8,200 m [2] |ceiling alt= 26,900 ft |climb rate main= |climb rate alt= |loading main= |loading alt= |power/mass main= |power/mass alt= |more performance=
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|avionics= }} See also{{aircontent||related= |similar aircraft=
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|see also= }} References1. ^{{cite book |last= Green|first= W |author2=Swanborough, G |title= The Complete Book of Fighters |edition= |year= 1994|location=New York|publisher= Smithmark |pages=308–309|isbn= 0-8317-3939-8}} 2. ^1 2 3 {{cite web |url= http://airwiki.org/enc/fww2/ro51.html|title= IMAM Ro.51|language= Russian|accessdate=2007-09-23 |work= }}
7 : IMAM aircraft|Italian fighter aircraft 1930–1939|Abandoned military aircraft projects of Italy|Single-engined tractor aircraft|Low-wing aircraft|Floatplanes|Aircraft first flown in 1937 |
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