Military Ground Vehicles of Your Nation [NO MECHS] Mk.V

[Rich and Corporations]

And because cast armour has to be thicker than RHA in order to get the same protection, I'm assuming that RHA is lighter overall?

Assuming that the metal is of the same density, yes.

How many square kilometers of windows will be broken if I used a 155mm ETC high pressure gun?

[Ea90]

Mass: 50t (???)
Length: 5.2m (hull), 5.7m (gun-forward)
Height: 2m
Width: 3.2m
Crew: 2 (Driver/Gunner, Commander/Radio Operator)
Armament: 157mm L/23 gun-launcher
Protects Against: All known tank-launched threats (hull front, turret front), 75mm APFSDS/HEAT (hull side), 90mm APFSDS/HEAT (turret side), 15mm AP (hull rear, hull bottom, turret top, turret rear)

[Rich and Corporations]

(Image)
Mass: 50t (???)
Length: 5.2m (hull), 5.7m (gun-forward)
Height: 2m
Width: 3.2m
Crew: 2 (Driver/Gunner, Commander/Radio Operator)
Armament: 157mm L/23 gun-launcher
Protects Against: All known tank-launched threats (hull front, turret front), 75mm APFSDS/HEAT (hull side), 90mm APFSDS/HEAT (turret side), 15mm AP (hull rear, hull bottom, turret top, turret rear)

All the lols.
Ground pressure must be super great.
Also, try to qualify your protection statements.
It has 90% protection against 75mm APFSDS... at ranges greater then 300/500 meters.

[Ea90]

(Image)
Mass: 50t (???)
Length: 5.2m (hull), 5.7m (gun-forward)
Height: 2m
Width: 3.2m
Crew: 2 (Driver/Gunner, Commander/Radio Operator)
Armament: 157mm L/23 gun-launcher
Protects Against: All known tank-launched threats (hull front, turret front), 75mm APFSDS/HEAT (hull side), 90mm APFSDS/HEAT (turret side), 15mm AP (hull rear, hull bottom, turret top, turret rear)

All the lols.
Ground pressure must be super great.
Also, try to qualify your protection statements.
It probably can protect against 75mm APFSDS... at ranges greater then 300/500 meters.

Yeah ground pressure will probably be an issue. When I get on my computer I'll calculate it and see what I need to do.
And I was under the impression that the penetration of APFSDS didn't drop a huge amount at ranges out to 1km.

[Rich and Corporations]

All the lols.
Ground pressure must be super great.
Also, try to qualify your protection statements.
It probably can protect against 75mm APFSDS... at ranges greater then 300/500 meters.

Yeah ground pressure will probably be an issue. When I get on my computer I'll calculate it and see what I need to do.
And I was under the impression that the penetration of APFSDS didn't drop a huge amount at ranges out to 1km.

http://www.tank-net.com/forums/index.php?showtopic=8332&pid=156211
Oh, right. Forgot about that.

Muzzle [ 1425 m/s] = 0.925 x 31cm = 28.7 + 2. 4 = 31cm ± 5cm @ 0° & 16.7cm ± 3cm @ 60°
1000m [ 1349 m/s] = 0.826 x 31cm = 25.6 + 2. 4 = 28cm ± 4cm @ 0° & 15cm ± 2cm @ 60°
2000m [ 1273 m/s] = 0.738 x 31cm = 22.9 + 2. 4 = 25cm ± 4cm @ 0° & 13.8cm ± 2cm @ 60°
3000m [ 1197 m/s] = 0.648 x 31cm = 20.0 + 2. 4 = 22cm ± 4cm @ 0° & 12.4cm ± 2cm @ 60°

A loss of 3 cm every 1000 meters still is the the difference between say, 90mm and 76mm.

[Ea90]

Well, according to the thread you linked, the difference in penetration between 76mm and 90mm APFSDS against a flat plate at the muzzle is more like 150mm than 30mm.
To be honest, I don't think the values I posted are particularly unreasonable, if you assume all threats are at the muzzle.
The only thing I'm not too sure about is the mass, and whether the frontal protection levels are achievable at it (I think it should be fine, though, considering the small protected area and short hull.

[Immoren]

Is it meant for tank or tank destroyer units?

[Ea90]

Is it meant for tank or tank destroyer units?

It's meant for urban environments, where its short length and low profile would make it useful and its large-caliber gun launcher would be good at blowing apart buildings and other stuff, while also being able to fire GLATGMs that can take ou tanks.

[Rich and Corporations]

To be honest, I don't think the values I posted are particularly unreasonable, if you assume all threats are at the muzzle.

No threats are at the muzzle.

[Imperializt Russia]

To be honest, I don't think the values I posted are particularly unreasonable, if you assume all threats are at the muzzle.

No threats are at the muzzle.

It happens.

[Ea90]

No threats are at the muzzle.

I mean that if they brought a 75mm gun up to the hull side and fired, it wouldn't penetrate.

[Rich and Corporations]

No threats are at the muzzle.

I mean that if they brought a 75mm gun up to the hull side and fired, it wouldn't penetrate.

Not necessarily.
Unless the quality of armor produced at your factories at manufactured at extreme tolerances (at which point you may as use cheaper but stronger armor at reduced tolerances), nothing is certain.
NOTHING IS CERTAIN IN A WAR.

[Ea90]

Not necessarily.
Unless the quality of armor produced at your factories at manufactured at extreme tolerances (at which point you may as use cheaper but stronger armor at reduced tolerances), nothing is certain.
NOTHING IS CERTAIN IN A WAR.

Obviously, but that's the protection level I'm aiming for.

[Anemos Major]

NOTHING IS CERTAIN IN A WAR.

That's a somewhat redundant point, since it negates the point of writing up a statblock in the first place The fuel efficiency might not be as advertised, so the range might dip slightly, there might be box on top of the turret, so the height statistics aren't necessarily correct... and so on and so forth.

(50t might be a bit optimistic, Ea90 - that, and a two man crew in an urban combat environment?)

[Ea90]

(50t might be a bit optimistic, Ea90 - that, and a two man crew in an urban combat environment?)

What would be better? 55t? 60t?
The two-man crew is to allow the very short hull, but yeah, it comes at the cost of increased stress and no ability to fire while on the move.

[Spirit of Hope]

(50t might be a bit optimistic, Ea90 - that, and a two man crew in an urban combat environment?)

What would be better? 55t? 60t?
The two-man crew is to allow the very short hull, but yeah, it comes at the cost of increased stress and no ability to fire while on the move.

That doesn't sound like a good idea.

[The Akasha Colony]

Is it meant for tank or tank destroyer units?

It's meant for urban environments, where its short length and low profile would make it useful and its large-caliber gun launcher would be good at blowing apart buildings and other stuff, while also being able to fire GLATGMs that can take ou tanks.

That long turret bustle though makes me rather wary of its ability to properly slew the gun in a tight environment. Now it needs clearance on both sides for the gun and bustle, rather than just for the gun. It's a problem many MBTs have, admittedly, but they're not designed with the same specific focus.

[Rich and Corporations]

(50t might be a bit optimistic, Ea90 - that, and a two man crew in an urban combat environment?)

What would be better? 55t? 60t?
The two-man crew is to allow the very short hull, but yeah, it comes at the cost of increased stress and no ability to fire while on the move.

If the two-man crew worked in close coordination with an infantry platoon, a platoon that is also trained in operating and maintaining the tank, you'll have no trouble with replacing casualties, maintaining security while the crew sleeps, or operating in shifts.

[Orussia]

Not anymore. There is one kicking around, but it's stupidly out of date. So I'm just going to start from scratch.
EDIT: Scratch that. It's recoverable. IS TIME TO DO WORKS.

Relevant.

I laughed sooooooooo hard when I opened that.

And it's scarily accurate to what I'm going to be doing.

[Rich and Corporations]

Landcruiser Series
====
The Tillman Armaments Corporation produced a series of feasible maximum size tanks between 1940 and 1970. They would all feature overlapping roadwheels. In order for it to be transported by rail, the side skirts, and some roadwheels would be removed. The tracks would also be replaced with a thinner set. The ground pressure with the railroad-transport tracks is excessive when used on flat ground, to say the least.

1942 Model
Weight: 80 tonnes
Length: 8 meters
Width: 3.75 meters (w/o side skirts), 4 meters (w/ side skirts)
Engine: 1000 hp naval diesel engine
Has the thinnest frontal armor, 75mm sloped at 45 degrees. Never made it past the paper prototype.
It's main armament would be the 16cm L/45 naval gun. Capable of elevating to 45 degrees and capable of firing anti-aircraft rounds.

1948 Model
Weight: 150 tonnes
Length: 9 meters
Width: 3.76 meters (w/o side skirts), 4 meters (w/ side skirts)
Fuel Capacity: 2000 liters
Hull Engine: 3000 hp at 3000 rpm H-24 turbo-chargered petrol engine
Hull Transmission: Synchromesh
Gear Ratios: 10.57:1 to 1.1:1
Turret and Auxiliary Engine: 450 hp at 2200 rpm, rotates the turret using a torque converter, for precision aiming, the two loaders and gunner can manually rotate the turret via hand cranks.
Has superior frontal armor, 80mm sloped at 60 degrees. Several prototypes were constructed. The H-24 engine was chosen over turboprop engines due to the low reliability of turboprop engines in vehicle testing, they would easily be destroyed by loose bolts or dirt kicked up by the tracks.

It's main armament is the 16cm L/45 naval gun. Maximum elevation is limited to 20 degrees/-11 degrees.

1965 Model
Weight: 220 tonnes
Length: 10 meters
Width: 3.73 meters (w/o side skirts), 4 meters (w/ side skirts)
Fuel Capacity: 3000 liters
Hull Engine: 3500 hp at 15000 rpm turbine multi-fuel engine
Hull Transmission: One speed forward, one speed reverse, capable of pivot steer
Gear Ratio: 16:1
Turret and Auxiliary Engine: 500 hp at 2200 rpm, rotates the turret using a torque converter, for precision aiming, the gunner can manually rotate the turret via hand crank.
Has siliceous plates in the frontal armor, 160mm sloped at 65 degrees. The use of a turbine engine and simplified transmission freed up two cubic meters of space. A dozen prototypes were constructed, and a few saw combat. Their operational range left them operating only within the range of the cover that aircraft carriers could provide and within range of a port with a steady convoy of fuel trucks to fuel it.

Not even MBT-70 is capable of penetrating this behemoth, it isn't until the eighties that nations achieve the ability to penetrate this with APFSDS.

It's main armament is the 9cm L/80 anti-tank gun. Maximum elevation is limited to 25 degrees/-8 degrees. Coaxial to the armament is a 7.5 cm howitzer, and a .7 cm machine gun.
It has a quick-rotating anti-aircraft turret on top of the turret. The turret is armed with a .7 cm gun and a 13 cm gun for anti-aircraft and anti-personnel use.
Penetration with APDS: 30 cm at 60 degrees at 100 meters
Penetration with HEAT: 29 cm at 60 degrees at 100 meters

[The Kievan People]

160mm at 60 degrees...

The Entac missile could cut through 650mm. You are more than a little outmatched.

[Rich and Corporations]

160mm at 60 degrees...

The Entac missile could cut through 650mm. You are more than a little outmatched.

Let me look up my numbers of siliceous cored armor again. Maybe it's closer to 300mm.

[Anemos Major]

Relevant.

I laughed sooooooooo hard when I opened that.

And it's scarily accurate to what I'm going to be doing.

Just make sure you do it in that 70s voice

Speaking of 'having the technology', I'm bumping this thread again - it breaks my little heart to see it this low. Does anybody have any suggestions concerning other variants of the tank's modular armour layout I can try my hand at?

---

The fifth HT9A8 prototype vehicle, built for the Army Office of Technological Development and attached to the Second (Rei) Division during its testing period. [Full size here]


An HT9A8 1S of the 5th the Guards Brigade of Horse Grenadiers, stationed in northern Duchy Fierei as part of the Fourth (Fierei) Division. [Full-size here.]


An HT9A8 1S fitted with UCP (Urban Combat Package) modules. Changes to the base HT9A8 include a thicker forward ERA array, full NERA coverage by lowered and thicker side-skirts, slat armour around the engine block, a 360 degrees camera mounted on the Multipurpose Sensor Mast, the use of a 25mm airburst AGL in the RWS block, modifications to allow wireless communications with infantry within 200m of the vehicle and a universal electronics reacharge point and provisions for the storage of up to 400kg of equipment at the back of the tank. [Full-size here.]

HT9A8 'Istrenyr' - First Standard (Block I) - Main Battle Tank

Designation:
Numerical Designation: HT9A8/IOCY
Name: "Istrenyr" - "Lancer Wyvern"

Key Data:
Crew: 3 (Commander, Gunner, Driver)
Designer: ODT-Milityr (Formatyr 'Yvernyr 2015')
Cost: TBA

Dimensions:
Length:
- Hull: 8.1m
- Gun forwards: 11.3m
Height:
- Turret roof: 2.2m
- Incl. RWS: 2.7m
- Chassis: 1.6m
Width:
- Hull: 3.7m
- w/ SCSP skirts: 4.1m
- w/ SCSP skirts: 4.4m
Weight:
- Base combat: 66,500kg
- w/ SCP applique: 73,800kg
- w/ UCP package: 79,500kg

Propulsion:
Engine: MA.252/mod H2, 22L, electronically-controlled, liquid-cooled, hyperbar, 10 cylinder opposing piston EUI diesel engine
Power: 2,000hp (1,491kW, steady state)
Power/Weight ratio: 30.08hp/tonne
Transmission: FMA MHPT M.550 Semi-Automatic Transmission, epicyclic gearing, hydrokinetic torque conversion, 6 forward/2 reverse gears
Suspension: In-Arm Active Controlled Hydropneumatic
Wheels: 7 road wheels, rear drive (12-tooth sprocket), front idler with 6 return rollers

Performance:
Speed:
- Road: 74kph road speed (electronically governed)
- Reverse (road): 38kph
- Cross-country: 52kph
Operational Range: 490km (internal fuel, road)
Acceleration: 0 to 32kph in 4.8 seconds

Armament:
Main Armament: 128mm SC12.4 55 calibre solid propellant smoothbore cannon, fitted with thermal sleeve and automatic compressed air fume extractor
- Ammunition: 42 rounds, 30 in two-bloc reloadable autoloader magazine (APFSDS/HEDP-MF/GLATGM/MRKE mix)
- Elevation: -9/+15 deg
- Elevation rate: 30 deg/sec
- Traverse: 360 deg
- Traverse rate: 45 deg/sec
Coaxial station (left): 12.7mm MG/H8A3 heavy machinegun (can be replaced by modular block compatible weapons)
- Ammunition: 2000 rounds (12.7x99mm, HEIAP/HEIAP-T mix)
Commander's weapon: 20mm M.30 Automatic Cannon on Powered Remote Weapons System (interchangeable with compatible armaments)
- Ammunition: 1000 rounds (20x120mm CTA, APFSDS-T)
- Elevation: -15/+60 deg
- Elevation rate: 40 deg/sec
- Traverse: 300 deg
- Traverse rate: 60 deg/sec
Additional: Mounting point for 1x commander-operated ultralight UAV, left and right turret mounting points for additional armaments
Fire Control: Aoede Digital Fire Control System

Protection:
Armour: Mordens-3 Passive Protection Suite (Standard Combat Protection layout)
- Base: Multiple layer composite (multiple alloy-ceramic), IRHA/Type 7720 Ti-Al alloy base
- Forward Applique: Composite-tiles backed modular EERA array, TiB2/Ti-6Al-4V cover fronting
- Side Applique: 5-section IRHA skirts with mounted composite-tiles backed NERA
- Additional Armour: Top-mounted NERA and distruptive plating, further protection can be added as necessary
Passive Protection Systems: Castel Passive Protection Component
- Sensors: 4 module full-coverage coarse/fine laser detection/missile warning suite, five-unit distributed full-coverage thermal imaging system, secondary coarse thermal signature warning system, 9-faced distributed phased-array pulse doppler radar, acoustic detection sensor, cateye sensor
Active Protection Systems: Castel Active Protection Component
- Soft-kill: 2x E/MY.23 'Astal' Electro-Optical Interference Emitters (one unit on either side of turret), 2x E/MY.303 Independent Infra-Red Jamming units (on topside of turret, fully traversible)
- Hard-kill: 4x aimable MEFP launcher modules, 2x guided KE interceptor arrays (one unit on either side of turret)
NBC: Collective and overpressure protection, compartmentalised auxiliary systems, full vehicular climate control, mast-mounted environmental detector (biological/chemical agents and gamma radiation), EMP hardening
Fire: Pentafluoroethane, automatic (crew compartment), Halon 1301 extinguishing/foam fuel tank self-sealing suite (engine block)
Smoke: 2x 8-barrel, 2x 4-barrel 3-in (76mm) multiple role dischargers, one of each on each turret side, variable autocue, diesel injection into engine exhausts

Sensors:
Primary Gunnery Sight: Eletyr MYR-34 full-stabilisation gunnery sighting suite (Daytime Optical Channel (3x, 10x, 20x three-step optical magnification), 3CCD video daytime channel (default magnification of 3x and 10x with digital magnification up to 20x), 3rd generation staring FLIR (3x, 7.5x (WFOV) 15x, 25x, 50x (NFOV) five-step magnification)
- Laser rangefinder: Eye-safe pulsed CO2 laser
- Gunnery aids: Stabilised doppler LADAR, roof-mounted crosswind sensor, integral muzzle reference sensor
Commander's Independent Sight: Eletyr MYS-404 full-stabilisation independent sighting unit (Daytime Optical Channel (3x, 10x, 20x three-step optical magnification), 3rd generation staring FLIR (3x, 7.5x (WFOV), 15x, 25x (NFOV) four-step magnification)
- PWRS sensors: Daytime 3CCD Video Channel (3x, 10x magnification with digital magnification up to 25x, 2nd generation staring FLIR (3x, 10x, 15x three-step optical magnification with digital magnification up to 30x), eye-safe Nd:YAG laser rangefinder
Elevated Optronics Mast: Eletyr MYR-31 full-stabilisation 3rd generation staring FLIR (3x, 7.5x (WFOV) 15x, 25x, 50x (NFOV) five-step magnification)
Additional sensors/sights:
- Gunner: Auxiliary 8x telescope
- Commander: 5-unit distributed 3CCD vehicular periphery viewing array
- Driver: Observation block (three-block observation periscope to left, centre and right, passive IR-sight, 3CCD camera visuals at fore and aft)

Communications/Networking:
Communications Management: SAIC Combat Networking Suite
Radio: CAGRE (Common Air-Ground Radio Environment) architecture multi-mode VHF/FM (30-150 MHz) radio, CAGRE compliant multi-mode ALE/ALE(3G) HF (1600-29999 kHz) command radio
Networking: Multi-mode UHF IPv4 compliant high capacity data radio, IEEE 802.11 standard ad-hoc E-WLAN, digital broadband connection capability
Battle Management: CombatNet Tactical Battle Networking Framework (WarNet integrated), IEEE L-Band IFF transponder, GPS receiver, IVIS datalink, POS/NAV capability
Protection: Proprietary compression/encryption, dynamic malware protection, EMP hardening (boron carbide shielding, computer hardening (SRAM, depleted boron-coated chip arrays, partial redundancy, error-correcting memory)

---

HT9A8 Developmental Timeline

- 1971: Directorate of Armaments and Procurement (DAP, now the Army OTD) initiates studies into the development of a deep modernisation package for the HT6A4 Alentyr C Main Battle Tank, then in development.
- 1975: The 120mm armed HT6A5 Alentyr D 'Artal' enters production. The DAP approves the formation of a number of small scale study groups under the auspices of various state arsenals to look into conceptual developments towards an eventual successor for the second generation HT6 series.
- 1978: A full scale development group is established under Section 2 of the DAP's Land Warfare Office to develop the HT6A6 upgrade package for the Alentyr D.
- 1979: Senior members of the DAP go on record as having serious reservations about plans to retain the HT6 as a mainline battle tank into the 1980s.
- 1980: Direct intervention by the Chief of the Army Staff leads to the full closure of the 1975 study groups, the then commander of DAP's Land Warfare Office (Colonel Tersi Solendyr) and twenty-four additional officers tender resignations over the decision.
- 1981: Introduction of the Alentyr D2 (HT6A7) upgrade package into service.
- 1983: An inquiry by Imperial mandate (headed by Baron Illen) finds that the Alentyr D2 is significantly inferior to numerous 'third generation' main battle tanks then entering service in areas ranging from armament and protection to electronics and mobility.
- 1984: Following an internal consultation by the Imperial Army, the DAP is instructed to pursue the immediate development of a third generation main battle tank.
- 1985: Study of concepts for the YT7 is produced, DAP Section 2 establishes a separate research group with corporate branches towards the development of principles of technology for a future main battle tank.
- 1988: The initial technical trialing vehicles are completed.
- 1990: The first eleven production prototypes are presented to the DAP, an extension of the trial period is requested by the DAP but rejected by the Army.
- 1992: Initial deliveries of the new tank to the Imperial Army, enters service as the HT7 'Fyrdestyr'. The new tank's performance reports are not released to the Imperial Staff as scheduled.
- 1993: The 15th Brigade of Heavy Horse's commanding officer refuses to re-equip his unit with HT7 tanks and is dishonourably discharged.
- 1994: Announcement of the 'Millenium' armed forces modernisation project and the establishment of direct Crown oversight into the modernisastion process itself. The forced release of the HT7's performance figures and financial irregularities point to significant misconduct concerning procurement at higher levels of the army, culminating in the then-Chief of the Army Staff's suicide and forced resignation of half of the Army Staff in its wake. The emergency procurement of the HT8 (Leclerc) Main Battle Tank is approved.
- 1997: First Leclerc-equipped brigade is rotated out of training into active service.
- 1998: An internal agreement is reached between the new Army Staff and the Army's new Office of Technological Development concerning the development of a successor to the HT8, whereby the initial development of a successor would be carried out by a state-owned corporate conglomerate from design principles established by the DAP's research groups while a longer-term developmental project would be pursued by a production group formed and headed by the OTD.
- 1999: Army issues official Request For Information for a domestically designed MBT to replace the HT8.
- 2001: Fierei-Oblastinei Automotives and Metalworks Group established via the intervention of the Army and secures the production contract for the now designated YT9 tank.
- 2003: Conceptual studies produced by the OTD for 'Tank 2015'.
- 2004: Technical prototypes for the HT9 series completed and presented to the Army by FOAM.
- 2006: First production prototype of the HT9 (the HT9A6 model) dispatched for field testing in Asakura. Following reservations voiced by the OTD concerning the proposed 140mm armament for the HT9, a prototype 128mm high performance gun is built to the OTD's specifications and tested on an HT9A6 chassis as the HT9-128.
- 2008: Finalisation of the HT9A7 design and delivery of the first production prototype to the Army.
- 2009: OTD completes production of first four technical prototypes (three automotive and one for basic armament testing) for the then-designated 'HT9-2015' in early 2009, followed by two additional prototypes for electronics and FCS testing.
- 2010: First deliveries of the HT9A7 to frontline units.
- 2011: Completion of the final SC12.4 128mm cannon design.
- 2012: First delivery of the OTD's 'HT9-2015' production prototype vehicle to the Crown Army, accepted into service as the HT9A8 and entering production within two months.
- 2013: First deliveries of the HT9A8 to frontline units.

[New Vihenia]

- Hard-kill: 4x aimable MEFP launcher modules, 2x guided KE interceptor arrays (one unit on either side of turret)

I'm curious in your tank's hard kill system..i wonder how it's work.

I'm also making APS, you may have seen my design requirements for APS radar.

The requirement is as follows :

-Detection range of 3 Km at most with 90% detection probability on Swerling I and III Target with RCS of 0,0001 Sqm.
-Low Probability of Intercept.
-Multiple Target Engagement, with tracking rate of at least 5 Hz with simultaneous target tracking capacity of at least 8 targets.
-Angular coverage of 360 degrees.
-Size not exceeding 40x30 cm in width and height.
-Resistance to ECM and ability to track down ECM Source.
-Weight of the total radar system not exceeding 75 Kg.
-Ability to withstand small arms fire to 14,5mm caliber and explosion splinters.

Already have some strategies in mind to handle those.. but i'm in cybercafe with no access to my excel stuffs.

Anyway are those requirements realistic for typical APS Radars ? Haven't seen any floating yet.

Maybe i could reference mine from yours

[Souriya Al-Assad]

Novembre 2021 In character:

Our People's Commissariat of Defence would like to unveil that two hundred new T-AD Assad Akbar Main Battle Tanks have been produced for this month, adding to the five hundred already in service. Speculations are these two hundred new marvels shalt be mobilised to assist an ally in fighting Qutbist insurgents abroad.