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1

Friday, July 10th 2009, 5:31pm

Tanks

Over view

Heavy Tanks
Atlantis has had little design work on Heavy Tanks, none progressing past initial drawing board preposals, due to the percieved lack of need for a breakthrough tank. That mindset has changed somewhat due to the increased international requirements due to various treatys.

Design work has slowly progressed but with the creation of the business consortium of TRANSAL, consisting of several manufacturer's from various FAR nations, designwork has increased. Two types are to be developed, a fast heavy cruiser tank and an infantry tank. Design of the first type has progressed quickly by simply upsizing current medium cruiser tank design, resulting in the AT-36 which is armed with a 75mm gun and uses sloped armour. Several designs are being examined for the infantry tank.

Medium tanks
Atlantis has several Medium tank designs in service, also as with heavy tanks the Medium tanks are catagorized under two seperate types, medium cruiser tank and medium infantry tank.

For a medium cruiser tank Atlantis has the AT-39 armed with either a 75mm gun or a 90mm gun. This tank is slowly replacing the venerable AT-36 and AT-35 tanks. The AT-36 is armed with either a 57mm gun of more commonly a 75mm gun. The AT-35 is armed with a 57mm gun and equiped with sloped armour. Two medium infantry tanks no longer in service are the AT-27 armed with a 37mm gun and the AT-33 armed with a 57mm gun. The later design is for all tence and purposes an improved AT-27, a design which was slowly replaced by the AT-33 and AT35 designs (with over 800 in sevice).

light tanks
Atlantis has two light tank designs in service. The first is the new AT-38 armed with a 57mm gun and is now the primary light tank in service.

The second design is the AT-34 which uses components from the two previous designs (AT-31 and AT-32), utilizes sloped armour and is armed with a 25mm quick firing gun.

Two designs are no longer in service. The first, the AT-31, is based on the Christie 1931 design. The tank is armed with a 37mm gun. The second is the AT-32 which is a slower design but armed with either one 37mm gun and additional machine guns or a pure machine gun armament. This later version quickly fell out of favor however, being easily replaced by armored cars similarily armed.

These tanks all replace the venerable AT-17, a tank based on the French FT-17 of great war vintage.

2

Saturday, July 18th 2009, 3:02am

Heavy tanks/main battle tanks

Model: AT-39/90




Designed to replace the venerable AT-36, the design further improves the sloped armor concept and uses improved suspension, thicker armor and a larger gun

Type: Fast Tank
Crew: 5 (Commander, Gunner, Loader, Driver, Radio)
Weight: 32 tons
Length: 6.95 meters
Width: 3.1 meters
Height: 3.0 meters
Speed: 50 km/h (55km/h for AT39/75)
Engine: 600hp
Range: 330 km
Armament: AT-39/90 1x90mm/L54 Cannon in turret; 1x.50cal in turret; 1x.30cal in hull
AT-39/75 1x75mm/L50 Cannon in turret; 1x.50cal in turret; 1x.30cal in hull
Armor: 60mm front hull, 45mm side hull, 90mm front turret, 35mm side turret


AT-37 (TT-37)
Originally designed by transall to be a standard FAR heavy tank, the TT-37 is largely based on a design by Russian Zhozef Kotin and utilizes experience from other designers and manufacturers from various FAR nations.

The design will see several minor changes depending on each nations specifications, the AT-37 is the Atlantean version. The design uses sloped armour for its heavy Glasis plate and very thick armour for its mantlet as well.



Model: AT(TT)-37/75
Type: Heavy Tank
Crew: 4 (Commander, Gunner, Loader, Driver)
Weight: 45 tons
Length: 7.0 meters
Width: 3.3 meters
Height: 3.0 meters
Speed: 36 km/h (22 mph)
Engine: 600hp
Range: 275 km
Armament: 1x75mm/L45 Cannon in turret; 1x.50cal in turret; 1x.30cal in hull
Armour: 100mm front hull (Sloped equivilent), 80mm side hull, 120mm front turret, 90mm side turret



AT-36 1A1 Cruiser tank




Model: AT-36/75
Type: Fast Tank
Crew: 4 (Commander, Loader, Hull Gunner, Driver)
Weight: 28 tons
Length: 6.7 meters
Width: 3 meters
Height: 3 meters
Speed: 55 km/h(34mph)
Engine: 600hp
Range: 275 km
Armament: 1x75mm/L45 Cannon in turret; 1x.50cal in turret; 1x.30cal in hull
Armour: 50mm front hull, 35mm side hull, 60mm front turret, 20mm side turret

Model: AT-36/57
Type: Fast Tank
Crew: 4 (Commander, Loader, Hull Gunner, Driver)
Weight: 26 tons
Length: 6.7 meters
Width: 3 meters
Height: 3 meters
Speed: 64 km/h (40 mph)
Engine: 600hp
Range: 275 km
Armament: 1x57mm/L45 Cannon in turret; 1x.50cal in turret; 1x.30cal in hull
Armour: 50mm front hull, 35mm side hull, 50mm front turret, 20mm side turret

3

Saturday, July 18th 2009, 3:12am

Medium tanks

AT-35 1A1 Cruiser tank





The AT-35 "Sabre" is a new design based on what amounts to an enlarged AT-31/32 chassis and hull using sloped, welded/cast armour, Christie patterned suspension and the new Aspis arsenal 57mm gun.

The design also enjoys an improvement over its predesessor's in the area's of firepower, protection speed and range.

Designs specifications

Type: Light/Medium tank
Place of origin: Atlantis
Service history: 1935-
In service: 1935
Used by: Atlantis, Colombia, Latvia and Romania

Production history
Designer:
Designed: 1934-35
Produced: 1937-

Weight: 20 tons
Length 5.76 meters
Width 2.65 meters
Height 2.65 meters
Crew: 4

Armor: 69-12mm, Hull - 62 mm Front, 27 mm sides, 29mm rear, 12 mm roof, 15 mm belly.
Turret - 69 mm front, 29 mm sides/rear, 12 mm top
Primary armament: one Aspis Arsenal 57mm MK I (110 rounds)
Secondary armament: two 7.62mm machine guns (2000 rounds each).
Engine: 1x Napier-hall 12 cylinder diesel developing 400 horsepower
Suspension: Christie type
Operational range: 170 miles
Fuel Capacity: 150 gallons
Speed: 35.54 MPH
Ground Pressure 10.07 PSI
Power/Weight Ratio 19.60 hp/metric ton




AT-33 (AT-27 MK II)Infantry tank

AT-33 1A1 above and 1A2 below


The AT-33 "Sentinel II" is an improvement over the AT-27 design, using experience gained from that design. The AT-33 1A1 has improved armour and is armed with the new Aspis arsenal 57mm gun as opposed to the standard Aspis arsenal 37mm tank gun. Speed is also considerably better than the AT-27. After an initial production run of 192 1A1's the hull was modified to mount the turret of the AT-35 in an effort to standardise tank components. This model is known as the AT-33 1A2.

As with the AT-27, the AT-33 hull will be utilised for a self propelled artillery and AA mount. In addition a turretless infantry support model using the new Aspis Arsenal 75mm Howitzer is under developement.

Length 5.5 meters
Width 2.75 meters
Height 2.5 meters

Crew 5 men
Passengers 0 men

Weight 19.04 tons.

Engine: 2x Napier-hall 6 cylinder diesels developing 250 horsepower total
Fuel Capacity: 120 gallons
Top Speed: 23.81 MPH
Operating Range: 141 miles

Armament: one Aspis Arsenal 57mm MK I (100 rounds) and two 7.62mm machine guns (1500 rounds each).
Armor: 48-10mm, Hull - 43 mm Front, 25 mm sides/rear, 12 mm roof/belly.
Turret - 48 mm front, 40 mm sides/rear, 12 mm top

Ground Pressure 16.4 PSI
Power/Weight Ratio 13.13 hp/metric ton

AT-27 MK IA1 infantry Tank



AT-27 1M1 Infantry Tank (Mexican 47mm version)



Designed as an infantry tank, the AT-27 1A1 was designed with the requirement that it be armed adequately to not only support infantry but to defeat enemy tanks if needed as well. This resulted in less than desireble armor for the design (quite normal for the period however).

The designs hull has also been used for a number of support roles, such as a self propelled artillery version, AA version and a heavily modified artillery tractor version. The AT-27 1A1 is also licence built in Mexico to slightly different specs, known as the AT-27 1M1, with a heavier 47mm gun. The Mexicans have also created their own self propelled design based on the AT-27 1A1.

Designs specifications

Length 7 meters
Width 2.75 meters
Height 2.8 meters

Crew 5 men
Passengers 0 men

Weight 16.23 tons.

Engine: Napier-hall 8 cylinder air-cooled inline developing 150 horsepower
Fuel Capacity: 105 gallons
Top Speed: 16.6 MPH
Operating Range: 136 miles

Armament: one Aspis Arsenal 37mm MK IV (100 rounds) and two 7.62mm machine guns (1500 rounds each).
Armor: 42-10mm, Hull - 21mm Front, 20 mm sides, 15 mm rear/12 mm roof/belly.
Turret - 43 mm front, 25 mm sides/rear, 10 mm top

Ground Pressure 14.99 PSI
Power/Weight Ratio 9.24 hp/metric ton

4

Saturday, July 18th 2009, 3:16am

Light tanks

AT-38 prototype, replacement for AT-31,32,34 and 35



AT-38 1A1 light tank
Crew: 4
Weight: 14.4 tons
Length: 5.3m
Width: 2.47m
Height: 2.16m
Engine: 350hp diesel
Armament: 1x57mm, 1x76.2 co-axial
Armor: 40-12mm, sloped
Performance: 60 km/h (37mph), 220 km (140 miles) operating range

AT-34 1A1


The AT-34 is basically a modified AT-31 design that has spawned from the Mexican requirement for the AT-31 design with improvements. The design is based on the AT-31 with components from the AT-32 and a newly designed turret to be armed with a 25mm cannon. The design also uses sloped armour.

AT-34 1A1 light tank
Crew: 4
Weight: 12.4 tons
Length: 5.6m
Width: 2.4m
Height: 2.35m
Engine: Roth 720R-1400 V-8, 300hp
Armament: 1x25mm
Armor: 20-6.25mm, sloped
Performance: 72km/h (45mph), 120km operating range


AT-32 "Rapier" MK 1A1


AT-32 MK 1A2

AT-32 MK 1A1 fresh off assembly line


AT-32 1A3 light tank
Crew: 4
Weight: 14.5 tons (20,000lbs/13,180 kg)
Length: 16'1"
Width: 7'7"
Height: 6'7"
Engine: Roth 668R-1200 7 cyl radial, 250hp
Armament: 1x37mm, 1x7.62
Armor: 20-6.25mm
Performance: 30mph/48km/h

AT-32 1A2 light tank
Crew: 4
Weight: 14.5 tons (20,000lbs/13,180 kg)
Length: 16'1"
Width: 7'7"
Height: 6'7"
Engine: Roth 668R-1200 7 cyl radial, 250hp
Armament: 2x50 cal MG, 1x7.62
Armor: 20-6.25mm
Performance: 30mph/48km/h

AT-32 1A1 light tank
Crew: 4
Weight: 14.5 tons (20,000lbs/13,180 kg)
Length: 16'1"
Width: 7'7"
Height: 6'7"
Engine: Roth 668R-1200 7 cyl radial, 250hp
Armament: 2x50 cal MG
Armor: 20-6.25mm
Performance: 30mph/48km/h

The Christie M1931
1A1, MG version

1A2, 37mm version




Presented following mixed results from the 1928 design, the 1931 design would later influence the AT-32 design. Two variants, armed with either a 37mm gun and two 30cal MG's or 2x50cal and 3x30cal MG's, were produced in limited numbers, later relegated to training duty's (AT-31 1A1's). Following Mexican interest the design's production was reinstated.

AT-31 1A3 light tank
Crew: 3
Weight: 11.5 tons (11,685 kg)
Length: 5.6m
Width: 2.25m
Height: 2.25m
Engine: Roth 720R-1400 V-8, 300hp
Armament: 1x37mm, 1x7.62
Armor: 20-6.25mm
Performance: 30mph/48km/h


AT-17, AFT-17 and FT-17

AT-17 (below)


AFT-17 MK's I and II, AT-17 Mk's 1 to 3

Crew: 3
Dementions: length (with tail) 16ft 5in, width 5ft 9in, height 6ft 7in
Weight: 7,000 kg
Engine: Napier-hall 4 cylinder water-cooled petrol engine developing 50 hp
Performance: Speed-15 mph (24 km/h), Range 60 miles (192km)
Armament: (AFT-17 MK I) one Aspis Arsenal 37mm MK I gun and one 7.62mm machine gun (AFT-17 MK II) two .303mm machine guns or one 7.62mm machine gun
(AT-17 MK I) one Aspis Arsenal 37mm MK II gun and one 7.62mm machine gun (AT-17 MK II and III) one Aspis Arsenal 37mm MK III or IV gun and one 7.62mm machine gun
Armor: AFT-17's 20-5mm, AT-17's 22-6mm

FT-17 MK's I and II



FT-17 Mk IA1 and 1A2 (above) and MK II (below)


Crew: 3
Dementions: length (with tail) 16ft 5in, width 5ft 9in, height 6ft 7in
Weight: 7,000 kg
Engine: Napier-hall 4 cylinder water-cooled petrol engine developing 50 hp
Performance: Speed-15 mph (24 km/h), Range 60 miles (192km)
Armament: (MK I) one 37mm gun and one 7.62mm machine gun, or one 7.62mm machine gun (Mk-II) one 75mm short barrel
Armor: 22-6mm


The bulk of these tanks are armed with 37mm guns,
the AFT-17 and AT-17's being equiped with the Aspis Arsenal 37mm MKI and II. The French built FT-17 MK II's are equiped with a 75mm short barrel gun, not widely successfull as turret is extremly cramped

AT-17 conversion to command tank