EE-T1 Osório

The Engesa EE-T1 Osório was a Brazilian main battle tank prototype. It was developed as a privately funded venture by Engesa, with little government support. It was intended to be sold first to Arab and other Third World countries, jump-starting production — and enabling the Brazilian Army to later place its own orders without having to fund development costs. However macro-political events including the Gulf War and North American political pressure led to the tank's demise, and the tank was never acquired by the Brazilian Army.

EE-T1 Osório
Class Vehicle
Type Armoured Fighting Vehicle
Manufacturer Engesa
Production Period 1982 - 1986
Origin Brazil
Country Name Origin Year
Brazil 1982
Country Name Operational Year Retirement Year
Iraq 1990 1991 View
Kuwait 1990 1991 View
Saudi Arabia 1990 1991 View
ManufacturerName Production From Production To Quantity
Engesa 1982 1986 2 View

Development started in 1982 and the first prototype was completed in 1985. The EE-T1 was considered for service with the Saudi Arabian Army. It was evaluated against the French AMX 40, the American M1 Abrams, and the British Challenger 1 and emerged as the winner. The Osorio was quite cheap and affordable while having better results in the trials than the other three MBTs. In September 1989, Saudi Arabia quietly opted for the M1 Abrams instead and only announced its new decision shortly after Iraq invaded neighboring Kuwait, triggering the Persian Gulf War. The two unique prototypes were given to the Brazilian Army as a result of Engesa going bankrupt.

Production history
Designer Engesa
Designed 1982–86
Manufacturer Engesa
Unit cost $ 6,855,859.20 BRL, ($3,840,261.00 USD)
Produced 1986
Number built 2 prototypes

Weight 42.9 short tons (38.9 t; 38.3 long tons)
Length 9.99 metres (32 ft 9 in)
Width 3.26 metres (10 ft 8 in)
Height 2.37 metres (7 ft 9 in)
Crew 4 (commander, gunner, loader, driver)
Armor composite, including aluminum/steel, carbon fibers, and ceramics.
Main armament 120 mm GIAT G1 smoothbore gun(P2), 105 mm L/52 L7 rifled gun(P1),
Secondary armament M2HB 12.7 mm machine gun x2 (coaxial and roof mounted)
Engine 12-cylinder MWM TBD 234 Diesel engine, 1,100 hp
Power/weight 26 hp/tonne
Suspension hydropneumatic
Operational range 550 km (340 mi)
Speed 70 km/h (43 mph)

End notes