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by Purpelia » Wed Jul 17, 2013 2:20 pm

by Oaledonia » Wed Jul 17, 2013 2:22 pm
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by Samozaryadnyastan » Wed Jul 17, 2013 2:22 pm
Questers wrote:Fixed the engine a bit. Any more details I should add?SA-20ER-F FERGANA
(Image)
ERMINE-R MODEL F EXPANSION
Operational Doctrine
The SA-20ER-F FERGANA is part of the Questarian Theory of Operational Strength, which concerns itself about how to maintain the strength and cohesion of its formations and their “combat capacity” over a period of sustained fighting. Because the doctrine is operational-focused, this has reflected on the design of the tank. The Fergana was supposed to:
(1) Have a high level of autonomy
(2) Be able to sustain operations as part of a larger formation
(3) Be tactically, operationally and strategically mobile
(4) Be affordable!
Furthermore the Fergana is expected to perform in a combined arms environment. Thusly its main goal is not to fight fist-to-fist with enemy MBTs, although with its high power gun it is more than capable of doing this. In any serious fight the Fergana will be supported also by infantry anti-tank, close air support, helicopters, tank destroyers etc.
The aim of the vehicle is to be a highly mobile and highly protected shock platform, not a self-propelled fortress.
The Fergana, despite its small size, possesses some clear advantages.
(1) It is highly mobile, with a low weight, low ground pressure, and long range. The hydropneumatic suspension means it can shoot more accurately whilst moving.
(2) It has a high level of autonomy; with a fuel tank worth 1.25 Expected Combat Days, much higher than other tanks, and with 40 rounds of high-powered ammunition, it can go on fighting for longer.
(3) Its modern battlefield network communications device is the most advanced fielded by the Army of the GSR.
The Fergana is a fast and deadly weapon, but it is optimised for the combat environment that Questers expects to fight in. It equips the Guards Cavalry Divisions of the Questarian Army. The Fergana is the most modern mass-produced tank of the Questarian Army, but its complexity has caused problems in production. Currently only seven of the Questarian Army's Cavalry Divisions have been equipped with the Fergana, as well as two Separate Regiments. Currently just under 3,000 units have been produced.
Dimensions
Weight: 50,000kg
Length: 7.11m
Length gun extended: 9.82m
Width: 3.70m
Height: 2.14m (bustle) 2.59m (FLIR boom extended)
Ground clearance: 43cm
Maximum gradient: 30°
Maximum tilt: 30°
Crew: Commander, gunner, driver
Miscellaneous equipment:
Two SARICA carbines 9mm, one Auto 36 pistol 9mm
Four carbine magazines, three pistol magazines
Two fire extinguishers
Three iPod docks
One Model 30 tea-machine station
One USB speaker plug for externally attachable speakers
Eight containers for external bustle rack
One large Mk 11 sapper shovel
A self-removal log attached to the back of the bustle
Attachments for ACRE self-entrenchment plough
Systems
8C5 Laser Rangefinder
8F21 EO day sight
8F30 panoramic EO sight
8A72 LWIR
8A79 LWIR
9D52 HD 1080p screen
10C3 Satellite Networking system
Fighting compartment & fire control systems
The gunner's seat, known as the Saddle Model 33, can be manipulated into various positions, including a footrest and a height adjuster. It is linked to the gunner's most important tool; the joystick, which he uses to manipulate the electrically powered turret and the main gun, and which he can also use to shoot the coaxial 14.5mm heavy machinegun.
The thing that strikes you first as you sit in the gunner's seat is the large screen mounted to his front. This is the 9D52 screen. It is an HD 1080p 1920x1080px colour screen on a cathode ray tube display monitor. Through this the gunner accesses the main sight of the tank, located above the gun.
He has two modes of camera; the 8F21 high-magnification electro-optical 3-CMOS active-pixel day sight, or the 8A72 passive thermal imagery long-wavelength infrared sight. He may switch between four modes using the joystick, or buttons on the screen; EO day sight, night vision sight, white hot thermal and black hot thermal.
The crosshair is located on the screen. This is just a matter of using the joystick to centre on a target – with 2x, 4x, 8x or 12x magnification, accessible from the joystick itself, and then using the ballistic computer and laser rangefinder to do the rest of the work. Then all he needs to do is pull the trigger to send a round downrange.
He may select between four ammunition types using a toggle mounted on the joystick.
He also has a backup, traditional sight, should the screen fail. He has other screens that display information on ammunition and other systems of the tank, but his main job is to use the main gun. Both the screen and the sight have the same reticule: it displays range to the target (in metres, 0000 to 9999), type of ammunition selected (and whether that ammunition is ready to fire), sight mode (1 for EO, 2 for night vision, 3 for white hot, 4 for black hot), magnification (0, 4, 8, 12) and a crosshair. Ammunition markers are A for APERS, G for GLATGM, K for APSFDS, H for HEAT, P for HE, T for training, S for smoke. The joystick has a trigger, operated by the index finger, and three switches, in triangular order, operated by the thumb: one on the top for magnification, and two on the bottom, left for ammunition type and right for sight mode. A button on the side of the joystick switches to the coaxial HMG. The iPod charger is located below and to the left of the joystick.
To the gunner's right is the main gun. He is protected by a small shield. To his right there is an ammunition bin for ten rounds in a wet box. He has a very small amount of desk space.
Now for the Commander. This is a more complex detail as the Commander has more tasks than the gunner. Firstly, you will notice the Commander has the same screen type, the HD 1080p CRT screen. This screen feeds into his panoramic sight, which is a retractable mast mounted EO camera with a FLIR. The camera is the 8F30; the FLIR is the 8A79. He can send the visuals from this mast to the gunner if he likes. He may also view the gunner's sight on his own screen. He also has a basic backup in case the screen fails. The mast sight and the basic panoramic sight have wipers. One of the commander's jobs is to be a spotter for the gunner.
The commander also operates the remote controlled gun station above his hatch. Using buttons on his joystick he may switch to the remote control gun station which also has a FLIR, type 8A30, which will be viewed on his HD screen.
He has a third screen, directly to his left,which is the battlefield management system: model 10C3 Battlefield Management Network displays to the commander all tactical information, including positions of friendly and (speculatively) enemy positions, orders, movements, so on and so forth. Via satellite uplink the 10C3 connects to other formations and shares intelligence and orders. In this way, all tanks are networked from the individual unit to the Company level. Below these screens are the radios and the controls for the smoke launchers. Next to them is the NBC control system.
He may manipulate his seat to move upwards to view the vision blocks, or to stand on the seat when unbuttoned. He may also swivel his chair to face a small desk area, to operate the boiling vessel: for safety reasons it does not maintain water at a very hot temperature.
Behind and above the commander and gunner are the air conditioning units. Behind and below both the commander and the gunner is a bin. Whilst this is really for spent ammunition, anything they don't like can also be thrown behind them. Behind this bin there is storage for twelve rounds of ammunition.
Armaments
The main armament of the Fergana is the 2D42 137mm, 47 calibre autoloading cannon. There is a coaxial 12.8mm HMG (750 rounds) and a commander's 12.7m HMG which is remote controlled (350 rounds.)
Calibre: 13.7cm, 47 calibre
Total gun length: 6.54m
Muzzle energy: 20 megajoules
Muzzle velocity: 1000ms
Maximum engagement range: 4000m KEP, 8000m ATGM
Rate of fire: 8rpm
DU KEP penetration: 900mm
Elevation: +18°/-6°
Total ammunition: 40 rounds
Maximum munitions size: 13.7cm/90cm
Muzzle energy of the 137mm gun is approximtaely 20MJ which is a great improvement on 120-125mm guns which maximum at <10MJ. Muzzle velocity is around 1000ms.
Autoloader system:
The Fergana utilises the WEBLEY autoloader system, named after the revolver. Two munitions drums, both of which hold 14 rounds, are offset in a large, blowout bustle behind the fighting compartment and both feed to a central loading system with a rammer. When firing 'in series', that is without changing munitions types, the firing rate increases to 10rpm. Twelve more rounds are located behind the fighting compartment and before the fuel tanks.
Protection
Defence inc. ERA:
KE Protection:
Turret: 650-800mm
Glacis: 680-800mm
Lower front hull: 325-410mm
CE Protection
Turret: 1100-1200mm
Glacis: 950-1150mm
Lower front hull: 375mm
HALIFAX Armour pattern
The armour system of the Fergana is fairly straightforward and consists of two elements, integral, and ERA. The classification for the integral armour system is HALIFAX. HALIFAX consists of an outer layer of rolled homogenous steel alloy, with a density of 7900kg/cu.m and a brinell hardness of 235. Next is a rubber layer, then a ceramics layer, then a layer of tungsten alloy, density 13,500kg/cu.m, brinell hardness 295. Then there is a spalling layer. The tanks armour plating is strongest on the turret front. The semi-panhandle design of the turret means that the frontal arc is much more likely to be hit than the sides, which have much less armour. Protection levels for HALIFAX are above.
CASTLE Armour pattern
The turret reactive armour, in the shape of a semicircle around the front turret, is known as 'Castle' explosive-reactive armour. The CASTLE system features a series of small shaped charges, angled at the appropriate level to receive an incoming charge. When these shaped charges are penetrated they are designed to explode and propel towards the penetrator, essentially incinerating it and preventing damage to the vehicle. CASTLE moduels are also fitted on the glacis and the side armour of the tank and vastly increase the protection rated for the vehicle. The CASTLE ERA protects the Fergana from armoured fighting vehicles in a higher weight range.
The vehicle is fully NBC protected.
Propulsion
The clutchless manual transmission is easier to operate and train than a fully manual system and is easier to maintain and produce than an automatic transmission, a trade-off accepted by the Army. The transmission is sequential and allows the driver to shift from any gear in the range with the gearstick (i.e. from sixth to second reverse.) The tank's snorkel allows it to ford water obstacles up to 1.8 metres deep. The torsion bar suspension consists of one large rubber-laid bearing roll per road wheel with supporting absorbers for every other wheel.
The tank can swim. It takes between twenty and thirty minutes to prepare and the tank can ford depths of up to 4 metres using a snorkel. Maximum travelling speed while moving through water is 7 kilometres per hour. The tank crew can also free the vehicle from obstructions using the self-removal log, which is externally acccessed and attached to the rear of the bustle.Powerpack
Engine: RVO Williams A108 V8 4-stroke 8-cylinder twincharged diesel engine rated at 1400bhp @ 3100 RPM
Displacement: 40L
Torque: 1600 lb-ft
Suspension: Hydropneumatic
Transmission: Clutchless manual transmission with Scott & Hardy Defence gearbox, seven forward gears and two reverse
Fuel capacity: 1200L internal, 200L external
Power/weight ratio: 28hp/t
Ground pressure: 0.93kg/sq.cm
Performance
Maximum speed on paved road: 80km/h
Maximum speed dirt road: 70km/h
Maximum speed cross country: 70km/h
Speed when swimming: 7km/h
Acceleration 0-35km: 7 seconds
Maximum range: 700km
Total unit cost: $5 million
Malgrave wrote:You are secretly Vladimir Putin using this forum to promote Russian weapons and tracking down and killing those who oppose you.

by Purpelia » Wed Jul 17, 2013 2:25 pm

by Stahn » Wed Jul 17, 2013 3:09 pm
by Anemos Major » Wed Jul 17, 2013 9:03 pm
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by Dostanuot Loj » Wed Jul 17, 2013 9:14 pm
Questers wrote:Fixed the engine a bit. Any more details I should add?
[spoiler]Propulsion
The clutchless manual transmission is easier to operate and train than a fully manual system and is easier to maintain and produce than an automatic transmission, a trade-off accepted by the Army. The transmission is sequential and allows the driver to shift from any gear in the range with the gearstick (i.e. from sixth to second reverse.)

by Bhelyant » Wed Jul 17, 2013 9:39 pm
Anemos Major wrote:Guess who? :>
(turret is based off a Wegmann layout, notes taken *heavily* from a number of 1970s-90s era projects concerning turret sizes and profiles. It *can* depress a lot more than at first sight, so no worries there)
) move up when the gun depresses?
by Anemos Major » Wed Jul 17, 2013 10:29 pm
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by Bhelyant » Wed Jul 17, 2013 10:48 pm
Anemos Major wrote:
Indeed, there's a flap that runs along the top past the mantle, and if you isolate the gun itself from the rest of the cabin you should be able (at the expense of some space) to retain NBC integrity.

by Anemos Major » Thu Jul 18, 2013 12:18 am
Bhelyant wrote:edit: how would ERA/NERA work on a system like that?
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by Questers » Thu Jul 18, 2013 1:07 am
Ah - now the thing is that this is a C&P from an older design and I don't remember my intention - I envisage two systems:Dostanuot Loj wrote:Questers wrote:Fixed the engine a bit. Any more details I should add?
[spoiler]Propulsion
The clutchless manual transmission is easier to operate and train than a fully manual system and is easier to maintain and produce than an automatic transmission, a trade-off accepted by the Army. The transmission is sequential and allows the driver to shift from any gear in the range with the gearstick (i.e. from sixth to second reverse.)
Like it.
One potential issue, just wording I guess. Your description implies the driver can move amongst the gears at will, ex. from sixth gear to fourth gear, without going through any other gears. Which is counter to a sequential, which has to go through the gears in sequence. Might just be me reading it weird. I know you know the difference.

by Samozaryadnyastan » Thu Jul 18, 2013 1:18 am
Malgrave wrote:You are secretly Vladimir Putin using this forum to promote Russian weapons and tracking down and killing those who oppose you.

by Questers » Thu Jul 18, 2013 1:24 am
That sounds complex.Samozaryadnyastan wrote:You could surely design a sequential box with a specially positioned reverse that could be engaged at any time?
It's just a matter of specially placing the shafts, surely.

by Samozaryadnyastan » Thu Jul 18, 2013 1:26 am
Malgrave wrote:You are secretly Vladimir Putin using this forum to promote Russian weapons and tracking down and killing those who oppose you.

by Vitaphone Racing » Thu Jul 18, 2013 3:24 am
Parhe wrote:Guess what, maybe you don't know what it is like to be Asian.

by Rich and Corporations » Thu Jul 18, 2013 11:44 am
Electronic Clutch Control (ECC)
The ECC uses only simple, reliable and low-cost mechanical
linkage and components and requires no adjustment at the assembly
plant or throughout the vehicle' s life cycle. Since internal
combustion engines cannot deliver torque at zero vehicle speed, a
device is necessary to bridge the gap between flywheel and gearbox
input speeds when the vehicle begins to move. Such devices have
taken the form of manually operated dry clutches, centrifugal and
electromagnetic clutches, hydraulic couplings and torque converter.
Of these, only torque converter and manual single-disk dry clutches
have been in vehicles over the last 20-30 years. They have been
highly cost effective, reliable and easy to use. However, the torque
converter exhibits constant slip even at high speed, with associated
high fuel consumption. A manual clutch is rugged and inexpensive,
does not slip, but is manually operated.
The electronic clutch control may eliminate the above problems.
Using an ECC, the clutch could be made automatic, eliminating the
conventional clutch pedal.
Corporate Confederacy DEFENSE ALERT LEVEL PEACE ▓ Factbook [url=iiwiki.com/wiki/Corporate_Confederacy]Wiki Article[/url] | Neptonia |

by Oaledonia » Thu Jul 18, 2013 6:45 pm
Stahn wrote:Oaledonia wrote:WOT U SAY M8?
![]()
This show is awesome!
I like the M3 Lee. But the best tank it is not.
The lovable PMT nation of hugs and chibi! Now with 75% more Hanyū!
Oaledonian wiki | Decoli Defense | Embassy | OAF Military InfoUnder construction
*POLITICALLY CONTENTIOUS STATEMENTS INTENSIFY*
by Dostanuot Loj » Thu Jul 18, 2013 8:09 pm
Questers wrote:Ah - now the thing is that this is a C&P from an older design and I don't remember my intention - I envisage two systems:Dostanuot Loj wrote:
Like it.
One potential issue, just wording I guess. Your description implies the driver can move amongst the gears at will, ex. from sixth gear to fourth gear, without going through any other gears. Which is counter to a sequential, which has to go through the gears in sequence. Might just be me reading it weird. I know you know the difference.
1 ) A gear stick that can be just pulled down from 7 to -2, or from -2 back up to 3, or whatever.
2 ) Paddles of some form, possibly as foot pedals, which are sequential.
I'm not sure which would be superior; the foot pedal system would allow both hands on "the wheel" (idk what mechanism it is [yet]) while being able to change gears on the move. Personally I think this might be better, except it would prevent rapid reversing... if you were in seventh gear you'd have to slam a pedal seven times rofl. But then you can never reverse immediately either.
I'm open to input on this matter.
Thanks, though.
by Anemos Major » Fri Jul 19, 2013 3:25 am
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by Stahn » Fri Jul 19, 2013 4:32 am
Anemos Major wrote:Fixed up the image somewhat so the turret can traverse. Feedback would be most welcome.
by Anemos Major » Fri Jul 19, 2013 4:45 am
Stahn wrote:Anemos Major wrote:Fixed up the image somewhat so the turret can traverse. Feedback would be most welcome.
Nice. It looks very low however. Is it a very large tank?
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by Noders » Fri Jul 19, 2013 9:14 am
Socialdemokraterne wrote:Noders: Only the finest books and pizza. And books about pizza. Not so much their book-flavored pizzas, though.

by San-Silvacian » Fri Jul 19, 2013 9:15 am
Anemos Major wrote:Fixed up the image somewhat so the turret can traverse. Feedback would be most welcome.
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