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EE-T1 Osorio Notes: In 1982, Engesa began the development of the EE-T1 main battle tank, and by 1985, it was ready for the worldmarketplace. The Engesa EE-T1 Osorio was a surprising development for Brazil a tank that, while not in the class of the latesttanks of the time, one that was far above the league of the typical third-world offerings. In design, it was similar to many tanks ofthe time; this was not surprising, since Engesa had a lot of help from West German, British and French armor experts. The EE-T1was very promising an excellent design that several countries were very interested in. The Saudis in particular went as far as toplace a pre-order of 318 for the Osorio. That deal, however, was essentially killed when the Saudis saw the incredibleperformance of the M-1 Abrams and the British Challenger, and they literally cancelled the Osorio order at the last moment. Thisresulted in the cancellation of demonstrations to other countries, the demise of Engesa, and with it a promising medium tank. TheBrazilian Army, itself a prospective buyer, also cancelled most if its order. The EE-T1 has a hull and turret with well-sloped frontal armor. Composite armor is incorporated into the glacis and turretfrontal armor, and spaced armor in the turret and hull sides; though data from Britain and Germany was used extensively, thearmor suite was essentially of Engesa design. The track skirts were almost identical to those found on the German Leopard 1. The chassis and hull were of almost completely Engesa design, but the turret design received large input from Vickers Defence ofBritain. The engine was a modified version of the German MWM TBD-234 1100hp diesel, and the transmission was likewise amodified German design. The suspension was a particular strong point, able to handle several kinds of difficult terrain quite well,and being easier to maintain than the suspension of most tanks of its class. The tracks themselves were almost identical to thoseused on the Leopard 2 at the time. Layout of the Osorio was for the most part conventional, with a commanders hatch ringed by vision blocks and a loadershatch on the turret deck, and a drivers hatch on the left front hull. The position layout, however, was unusual, as the commanderwas on the left side of the turret and the loader on the right. The machinegun could be aimed and fired from under armor ifnecessary, and could be elevated almost vertically. Large stowage boxes are found on either side of the turret, along with eight-barrel smoke grenade launchers. The stowage boxes made a bustle rack unnecessary. At the rear of the turret is a short mast fora meteorological sensor. Two versions of the Osorio were designed: The EE-T1 P-1, armed with a 105mm gun, and the EE-T1 P-2 (also known as theEE-T2), armed with a 120mm gun. The turrets were somewhat different to account for differences in gun and ammunition size, butfor the most part the two versions of the Osorio were identical. Gun stabilization is electro-hydraulic. On the 105mm-armedversion, the commander had a Belgian-made sight that gives the Osorio a hunter-killer capability. The gunners sight equipmentwas similar to the commanders, with the addition of a ballistic computer and laser rangefinder. The commander had emergencybackup controls for the main gun, and could also access the gunners sight. The EE-T1 P-2 was more advanced in its fire control setup. The commander had his own laser rangefinder and ballisticcomputer, allowing him to quickly hand off fire solutions to the gunner, or use the laser rangefinder and ballistic computer with hismachinegun. The commander and gunner could access data from each others sights. The targeting systems of the P-2 versionwere French-built instead of Belgian-built, since the 120mm main gun was also French-built. An NBC overpressure system was an option on both versions, as was a warning system that signaled the crew when atargeting laser was shining on them. Twilight 2000 Story: This vehicle went into high production in the Twilight 2000 timeline, as the Twilight War commenced. Theywere in use by Saudi Arabia, Kuwait, Iraq, and some African nations, as well as Brazil herself. Merc 2000 Story: The Osorio went into low-rate production, primarily for export, in the Merc 2000 timeline.

Vehicle Price FuelType

Load Veh Wt Crew Mnt Night Vision Radiological

EE-T1 P-1 $684,751 D, A 500 kg 40.44 tons 4 16 Thermal Imaging (G, C),Passive IR (D)

Shielded

EE-T1 P-2 $1,029,693 D, A 500 kg 43.7 tons 4 16 Thermal Imaging (G, C),Passive IR (D)

Shielded

Vehicle Tr Mov Com Mov Fuel Cap Fuel Cons Config Susp Armor

EE-T1 P-1 142/99 32/22 1354 456 Trtd T6 TF64Cp TS20Sp TR10H80Cp HS15Sp HR10

EE-T1 P-2 136/95 31/21 1354 474 Trtd T6 TF64Cp TS20Sp TR10H80Cp HS15Sp HR10

Vehicle Fire Control Stabilization Armament Ammunition

EE-T1 P-1 +3 Good 105mm L-7 Gun, MG-3, M-2HB (C) 45x105mm, 5000x7.62mm, 600x.50EE-T1 P-2 +3 Good 120mm GIAT Gun, MAG, M-2HB (C) 40x120mm, 5000x7.62mm, 600x.50

AEC A-41 Centurion Notes: The Centurion was initially designed to be a sort of Tiger Killer; a tank with the firepower and protection to be able totackle the German Tiger and Panther tanks on equal terms. Unfortunately, only six made it to Europe by May 1945, less than aweek before the Nazi surrender. It would not be until the Korean War, in January of 1951, that the first Centurions would seecombat in the capable hands of the 8th Kings Royal Irish Hussars. Some 13 versions of the Centurion were developed by theBritish, and the Mark 3 was the first to see combat. Other countries have also developed tanks based on the Centurion, bringingthe total to over 20 subtypes. Centurion Mark 1 and Mark 2 Designed for World War 2 combat against what were then the most heavily armed and armored tanks of the time, the design ofthe Centurion was aimed at being able to penetrate heavy armor at long range, being able to take a hit and keep going, and toimprove protection against antitank mines. An increase in mobility was also considered desirable, but not as much required as theother specifications. (Cross-country performance, however, was considered more important than road speed.) The layout wasessentially conventional and similar to modern tanks, with commanders hatch on the left turret deck, a loaders hatch on the rightturret deck, and the drivers hatch on the left hull front. The commander had all-around vision blocks, along with a periscope at thefront with magnification. The driver had two wide vision blocks in front of his position, and the gunner and loader both had aperiscope to see outside of the turret. Unusually for a tank of its time, the Centurion had no radio operator/hull machinegunner;there simply wasnt room in the front hull, and the loader became a loader/radio operator. Instead of a turret bustle rack, the sidesof the turret had large stowage boxes. Armament consisted of a 17-pounder (76.2mm) high-velocity gun, the same found on the Comet cruiser tank. The Mark 1 hadtwo 7.92mm coaxial machineguns; these were mounted independent of the main guns mantlet in their own ball mounts, and couldbe moved independently of the main gun. Optionally, a third machinegun could be mounted, firing through a ball mount in the rearof the turret, but this required the removal of the smoke mortar and the escape hatch as the rear of the turret. A 51mm mortar thatfired smoke rounds was also installed in the turret. Some initial versions had a 20mm Polsten cannon instead of the right sidecoaxial machinegun; but the cannon (as well as the extra coaxial machinegun) proved to be unpopular. (Note that this is acannon, and not an autocannon.) The gunner had a basic telescopic gunsight, and one of the coaxial machineguns could be usedas a ranging machinegun. The glacis plate had more sloping than most tanks of the time, and under the track skirts and behindthe tracks, the hull was also slightly sloped. (The standard production Mark 1 is listed as Type 3 below, but this is not an officialdesignation by any means.) The engine compartment was large but well-thought out; it contained a 600 horsepower Rolls-Royce Mk 4 Meteor engine withan enlarged crankcase and a dry sump. The transmission was manual, and driving the Centurion was a task requiring a ridiculousamount of manual dexterity, coordination, and strength. Suspension was by an AEC/Rackham system based on a blend of Christiesuspension and horizontal volute suspension. The Mark 2 (also called the A-41A) was an evolutionary development of the Mark 1, replacing the Mark 1 in production afterabout 100 Mark 1s had been built. A number of changes were made; most notably, the Centurion became heavier, since thearmor on the glacis and turret front became thicker. The coaxial Besa machineguns remained, despite tankers insistence that theywanted Browning M-1919A4s instead. Initially, a more powerful 20-pounder gun was to be fitted, but instead the Mark 2 retainedthe 17-pounder gun. The main gun, however, got gyroscopic stabilization for elevation and deflection soon after productionstarted. (Those Mk 2s with the new stabilization were called Mk 2/1s.) Most of the main gu