The Reggiane Re.2005 Sagittario was an Italian monoplane fighter and fighter/bomber produced for the Regia Aeronautica during the later years of World War II.
Along with the Macchi C.202/C.205 and Fiat G.55, the Reggiane Re.2005 was one of the three Series 5 Italian fighters.
The lines of the fuselage were aerodynamically efficient, and the design was intended to exploit the famous Daimler-Benz DB 605 engine.
The only drawback was a certain structural weakness in the rear section of the fuselage.
Only 48 examples had been delivered before the Armistice, and these fighters took part in the defence of Naples, Rome and Sicily, with the survivors battling above the crumbling ruins of Berlin, in German insignia.
The Re.2005 was a low-wing, single-engine, single-seat fighter monoplane, made of light alloys.
Propulsion was by a 1,475 hp (1,100 kW) Daimler Benz DB.605A-1 engine, either of original German production or built by Fiat as the RA.1050 RC.58 Tifone (Typhoon).
The aircraft had a right-handed, three-bladed Piaggio P.2001 constant speed, mechanically controlled, variable-pitch metal propeller.
The streamlined but tiny fuselage was almost totally dominated by the DB 605 engine with little room for fuel storage.
The fuselage-mounted MG 151/20 cannon had less ammunition than those mounted in the wings (150 rounds versus 170 rounds in the wing gun bays from the second prototype on).
The comparable Fiat G.55 had 250 rounds for the fuselage gun but also 600 for a 12.7 mm machine gun.
The smaller Re.2005 also carried 100 fewer 20 mm but 100 more 12.7 mm rounds, a lighter armament array.
The aft fuselage was unusually small, even by Italian standards and contained the radio equipment, oxygen bottles and supported the relatively large fin.
The cockpit was covered by a canopy which tilted to the right for access and had an armoured 50 mm glass windscreen.
Other protection included a seat with 8 mm (0.31 in)-thick steel shell weighing 40 kg (88 lb).
The seat provided little protection against 12.7 mm rounds which were capable of piercing even 25 mm (0.98 in) at short distances, but the armour was tempered, giving more protection than homogeneous steel.
Given the heavy weight of a thick steel plate, every attempt was made to make the steel alloy used stronger and a headrest was attached to bulkhead six.
The sophisticated wing design, often described as elliptical, was semi-elliptical, with wing thickness tapering from 15 percent at the root to 8 percent at the tip.
The structure of the three spars incorporated a “T” section.
The triangular-shaped wing and tail control surfaces were mostly fabric-covered, included all-metal two-part split flaps and statically balanced ailerons.
Fuel was carried in four self-sealing wing tanks, two forward and two behind, providing a capacity of 525 l (115 imp gal; 139 US gal).
The wide-track undercarriage retracted outwards into the wings and the tailwheel were fully retractable.
The Re.2005 was the only Italian aircraft of the war to have hydraulically activated flaps.
The Re.2005 was one of the most advanced Italian fighters but it was also too advanced to be made by the Italian industry and one of the most expensive, if not the most expensive to produce.
The complexity of the Re.2005 design and small dimensions led to the Fiat G.55, being evaluated as a superior choice for mass production.
