Marauder AFV

here is the preliminary specifications for a Tank.
Primary weapon: 120mm smoothbore cannon, (rifled gun available depending on customer spec) - 50 rounds
coaxial: 7.62mm machinegun (M60 class)
secondary weapon: TOW / HOT 4 tube missile launcher


Combat Weight: 50,000kgs

Dimensions
Width: 4000mm (over track armour) 3750mm across tracks
Height: 3,000mm
Length Overall: 9700mm (long barrel weapon - gun forward)

Engine
Diamond Star V12

Capacity: 40.2 Litre

max power @ 1500rpm 1500bhp


Fluid capacities:
Oil: 150 litres


Fuel capacity: 1500L
range: 550km (internal fuel)
max speed: 60km/h


Diamond Star Intelidrive 6 speed Automatic - dual direction (6f 6r - hydrostatic bi-directional pump final drive system)

Brakes
Hydrodynamic on main sprocket, disc brakes on idler wheels

Suspension: torsion bar suspension

price: $6,000,000
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I am not that well up on mobile armour, (tracked, wheeled or legged so need help here)

things like Armour i have left off, I have NO Idea how thick modern armour is these days to stop a 120mm shell dead in its tracks. something tells me 50mm of heavy duty steel plate wont stop s**t now

Rather than 'the gun can be rifled', it would be better to state 'a rifled gun is available as alternate armament', as a rifled gun will be very different in overall design to its smoothbore sibling. As will its ammunition, probably.
On that note, can we have a gun length? 9.7m gun forwards is quite short, implying a short gun, since 4m width and 3m height implies a slightly oversized Western tank.

You're right, armour these days is very complex. Check up the thread by South Estovakia, where Lamoni linked a bunch of types of armour. The composition and physical size would be your own choosing. This is what I'm trying to nail on my own battle tank right now.

600 or 700mm if you use high density materials. Maybe twice that if you don't.

External launchers? do not want. Rocket motors are not insensitive and can be quite explosive when hit.

So does it have a capacity of 38.2 or 32.8 Litres?

12 gears = far too many. Unlike a truck, the loading of a tank doesn't vary as much and there isn't as much available space for driveline components. 5 is sufficient, 7 is plenty. As for reverse gears, pick a number between but not including 1 and 5.

Since your tank is fucking huge (4m across and 3m over and 70kkg) you will wanting to get the best out of that armour. Although the tank is lolsily fast. You'll have to explain how it gets that fast with a hp/ton of 22.1 and on an 32L (or even 38L) engine.

It's probably not that high off the pace.
Challenger 2 manages a bit under 30km/h under this, despite being almost ten tons lighter. Chally also has a 26l engine, as opposed to a 32 or 38 litre, and only 19.1hp/t versus 22.

leo2 is 3.76m wide before the PSO kits additional armour.

82km/h, thats 50mph, just a shade faster than the Leo2, and given the larger engine i have put in there, a 38.2 litre V12 diesel, the figures were what I'd expect a tank to do. in fact i am surprised the Chally2 can only reach 50km/h!

also...

the power output is a guestimate based on the engines of modern tanks

Your tank is 113% faster than Leo while weighing 112% of the Leo, employing an engine with a capacity of only 80% capacity with 104% of Leo's BHP.

Do you see the problem here? However, those figures are the wiki figures, I'm not actually sure of Leo's real top speed.

It is fine in all other respects.

50km/h??

and increase engine capacity to 40 litres V12? (remaining air cooled), and drop weight to 60,000kg?

im basing the additional weight on the extra armour that has been gained on the PSO variant, im also guessing that as the PSO variant of leo is wider, 4m would also be about the right width, she's only 3.75m over her tracks.

remember, i have been around trucks a while, even drive the things!, have read plenty of mags that give truck specs, Tanks and military hardware, I have NOOOO frikkin idea where to start.

and my engine was SMALLER than leo2? wow

I chose the 120mm because of the fact that several NATO main battle tanks use it, leo, chally, M1 i think all use that, so it makes sense.

its speed was also the highway speed of the tank, not the off highway speed, though at that speed its probably going to guzzle fuel

Leo 2 has a fucking huge engine. i think that's why it goes so fast. It's 47L in displacement.

You have to consider what is going in your tank. Your armament is sane so don't worry about that. At 70,000kg you can fit a bigger engine. The 'heavy' Western tanks are Leopard at 63t, Challenger at 62t and Abrams at 61t. 70t is very heavy. You can bring that weight down and keep the speed and keep the modern armour or I guess you could pile it up with armour but bring down the speed. 50kmh is very slow. Challenger is a slow tank and that goes 56km.

47 litres ****ing hell!

so ok,

55,000kgs, and 65km/h.

retaining a 40L air cooled V12. reason for air cooled, no cooling system to let you down, as long as its running the direct driven fans are blowing air onto that V12 block, two fans one for each side. exhaust air also taking heat away from the torque convertor and gearboxes. (there is a transfer case to split drive left and right (i presume thats how they do it on a tank), with each side of the transfer case connected to a hydrostatic transmission which working with the transfer case sorts out direction. the 7 speed gearbox itself having no reverse gear. resulting in 7F 7R speeds.

While just about every Western army uses a 120mm gun, not all of them are NATO. The British and French guns, for example, are not NATO standard.

As further note, for a western army, the reasonable maximum weight limit of a battle tank is 64 tonnes due to rail limits. Your tank can be heavier than this, so long as it can still be in a fighting state at 64 tonnes. If it's still 70 tonnes, you can just layer it in literally bolt-on armour schemes, cage armour and ERA racks that are all removable. That'll probably lop off 10-20 tonnes when all removed.

I have cut the combat weight to 50,0000kgs, wasn't aware of the 62,000 kg limit.