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Ambrosini Sagittario I & II & Aerfer Ariete

Sagittario 1

The Ambrosini Sagittario 1 was an Italian aerodynamic research aircraft based on the manufacturer’s S.7.

New swept wings and tail surfaces of wooden construction were fitted to the S.7 fuselage.

The wing leading edge was swept at 45 degrees.

At first, the S.7’s piston engine was retained and the aircraft was known as the Ambrosini S.7 Freccia.

After several test flights in this configuration, the piston engine was removed and replaced with a Turbomeca Marboré turbojet of 3.7 kN (840 lbf) thrust, and the aircraft renamed the Sagittario.

The engine air inlet was in the extreme nose, and the exhaust was routed out the bottom of the fuselage, under the cockpit.

The tail wheel undercarriage was retained, so special shielding was added to protect the tail wheel from the engine exhaust.

Sagittario 2

A small all-metal aircraft, the Sagittario 2 had its jet engine mounted in the nose, with the exhaust underneath the mid fuselage.

The wing and tail surfaces were highly-swept.

The cockpit was moved forward of its position on the Sagittario’s predecessors, and equipped with a bubble canopy.

A tricycle undercarriage was fitted, with the nose gear retracting under the engine.

Aerfer Ariete

The Ariete was a prototype fighter aircraft built in Italy in 1958.

It was a refined derivative of the Aerfer Sagittario 2, and was an attempt to bring that aircraft up to a standard where it could be mass-produced as a viable combat aircraft.

Retaining most of the Sagittario 2’s layout with a nose intake and ventral exhaust for the main Derwent engine, the Ariete added a Rolls-Royce Soar RS.2 auxiliary turbojet engine to provide additional power for climbing and sprinting.

This used a dorsal, retractable intake with its exhaust at the tail.

No production ensued, a proposed version with an auxiliary rocket engine instead of the auxiliary turbojet, the Aerfer Leone, was abandoned before a prototype could be built.


Ambrosini S.7

Racing aircraft

Ambrosini Sagittario

Aerodynamic research aircraft

Aerfer Sagittario II

Prototype all metal single seat lightweight fighter aircraft

Aerfer Ariete

Prototype fighter aircraft


Sagittarrio II




9.50 m (31 ft 2 in)


7.50 m (24 ft 7 in)


2.02 m (6 ft 8 in)

Wing area

14.73 m2 (158.6 sq ft)

Aspect ratio




Laminar symmetric 8.5% thick,


Laminar symmetric 9.30% thick

Empty weight

2,300 kg (5,071 lb)

Gross weight

3,293 kg (7,260 lb)

Fuel capacity

1,200 l (320 US gal; 260 imp gal) in 4 fuselage tanks


1 × Rolls-Royce Derwent 9 centrifugal flow turbojet, 16 kN (3,600 lbf) thrust


Maximum speed

1,006 km/h (625 mph, 543 kn)


765 km (475 mi, 413 nmi)

Service ceiling

14,000 m (46,000 ft)

Rate of climb

42 m/s (8,300 ft/min)

Time to altitude

12,000 m (39,370 ft) in 10 minutes

Wing loading

227 kg/m2 (46 lb/sq ft)





2 × Hispano-Suiza 30 mm (1.181 in) cannon with 300 rpg


2 with a capacity of 318 kg (701 lb),with provisions to carry combinations of:


2 × 318 kg (701 lb) napalm tanks


2 × 227 kg (500 lb) bombs


2 × machine guns or cannon


12 × 7.62 cm (3 in) rockets.


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