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Xoon

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Everything posted by Xoon

  1. Xoon
    Lets talk about fire control systems. How do they function and what makes them so expensive? As far as I understand basic fire control systems: The operator/chip in the round/marker inputs the shell data. A range finder finds the range of the target, and calculates the trajectory of the shell. A sensor (dunno what they are called) finds the height difference between the AFV and the target, compensating for the elevation/depression. A temperature sensor gives the temperature to compensate for loss of power in the gunpowder and air density. A wind sensor gives the wind speed, compensating for the wind. A sensor keeps track of barrel sway and its position and compensates for it. Two encoders keep the positioning of the turret azimuth and gun elevation. A vision camera/vision software tracks the target, compensating and moving the turret according to the target. (Also tracks target heading?) A laser surface velocimeter measures the targets speed, and compensates. All this is feed into a microcontroller, which calculates the appropriate coordinates, which is feed to most likely two servos controlling the turret traverse and elevation. When the gunner squeezes the trigger, the systems safety is off and will pull the trigger when the gun aligns with the coordinates. The microcontroller also feeds the information into the AFV's main computer. Of course, some formulas and PID regulators would be used to gain the appropriate values. This is how I theorize the FCS of a modern AFV works. Top of line, as you can begin shaving off features to have it cheaper, though the vison camera probably comes for free if you have a thermal or digital sight. Feel free to correct me if you want. If anyone has information about FCS or can add some more please do.
  2. Xoon
    Welding aluminum would also be more costly. Need to have the surface oxide layer grinded away. Also welding aluminum in general is harder because of its low melting point, high heat capacity and good thermal conductivity. Machining aluminum is however, much easier than steel or harder alloys. Drilling and cutting hard steel plates is also a huge pain in the ass. I hate stainless steel, and it is not even close to the hardness of armor steel. Automation would probably fix most of these issues. Robotic welders would accomplish a "perfect" weld, drill jigs would drill out all the holes on on side of the hull simultaneously. Casting and a good supply of tungsten bits would greatly decrees man hours needed.
  3. Xoon
    *Kongsberg NASAMS intensifies*
  4. Xoon
    In pains me that I probably won't be able to throw my hat in the ring. But in case I get the chance, I have a few questions: What is the average height of a conscript male? What fuel does the enemy use? Is the technology cut-off date 1969? Is cast armor roughly 15% weaker?
  5. Xoon
    https://newatlas.com/electromagnetic-flywheel-engine/55254/ Interesting talk about replacing the flywheel with a electric motor.
  6. Xoon
    Variable Geometry turbocharger: Twin Scroll turbocharger: Variable Twin Scroll Turbocharger: Watch these three videos, which will give you a quick explanation of the three turbochargers. ??? Integrated exhaust manifolds simply make the exhaust manifold a part of the block. This allows it to be water cooled. And the heat from the exhaust helps heat up the coolant running through the block, helping it reach optimal temperature faster. It also allows for better turbocharger performance. The AVCR-1360 sound more and more interesting. Oh, it was air cooled. My bad.
  7. Xoon
    So in theory, the crank shafts would be lighter, not needing the counter weights I guess. From what I gathered, they basically had the luxury of computer modeling, found out that by turning the entire engine a little to the side, it saves height and a better air flow.
  8. Xoon
    Has integrated exhaust manifolds been considered? It should help with cold starts and provide a faster way of getting the engine up to the optimal temperature. Also it allows you in theory, to reduce the temperature of the exhaust. Other neat features would be variable twin scroll turbochargers.
  9. Xoon
    How does it work in a diesel? Does it just lower the compression ratio to compensate for the higher boost?
  10. Xoon
    Why would Variable Compression (VC) be useful in diesel vehicles? I would like to see a camless engine. Like the one Koenigsegg is developing.
  11. Xoon
    Are these engines inherently balanced?
  12. Xoon
    Turret number matches the army's posterboy: Leopard 2 121 Allfader: Might have been used to test new armor for the upgrade program:
  13. Xoon
    I found this video, in which the company Achates talks about their opposed piston engine, and the 1500hp opposed piston engine planned for a future MBT:
  14. Xoon
    As far as I am aware, you simply use a longer swing arm if you want longer travel. However, considering that you can't have 1000 mm of travel because of obvious reasons, you need better dampening, which is where the actual performance of the suspension comes in. The reason why the Challenger II has less travel is because it does not need it. The better dampening compensates for it. Think about how the recoil mechanism of a gun works. Thanks for explaining! How? As long as you can adjust the pressure of the hydraulic line, it should not really add anything to the system. AFV manufactures keep advertising their "open architecture high speed networked" AFVs. This means that all the subsystems are networked together. No additional wiring needed between the FCS and main computer, and no extra needed wiring between the main computer and suspension control unit. If not, I would honestly fire the engineer in charge of these systems for incompetency. Or straight out reject the AFV as a costumer. The rest is just code: def suspension_temperature_compensation(temp_value, adjust_value): """ Program for adjusting the suspension after the ambient temperature. """ sus_adjust = temp_value * adjust_value return sus_adjust suspension_temperature_compensation(80, 0.1) By inputting the value 80, meaning 30 degrees C ( -50 C becomes 50, and 30 C becomes 30, 50 + 30 = 80), and the adjustment value, which would be the expansion ratio of the gas compered to the temperature. I set it to a arbitrary 0.1, which would make the function output 8, as in 8 mm increase in the suspension height. This would then be feed into a the controller of the suspension, which would adjust accordingly. Actually, the entire code above would probably be integrated into the ride height programming. This was coded in Python, for those who want to know the syntax. This is not really complex. Digital programming does not really break down faster because of more complexity. Or you can use a virtual PID regulator. It would be better.
  15. Xoon
    Use nitrogen? Like a valve? Welcome to SH! Has any tank designer considered moving most of the working elements out of the suspension unit? Simply move the accumulator inside the hull, or away. Then you have a simple hydraulic actuator and a swing arm outside the hull, which should not really be much bigger than torsion bar. To vary the dampening, add a valve between the accumulator and the hydraulic line. Something like this:
  16. Xoon
    Not sure how comparing the suspension travel of two different suspensions makes sense here? You could simply make a Hydropneumatic suspension with more travel right? So you are saying that the hydropneumatic suspension is heavier than torsion bar, and that it is lighter is a myth? What was the weight of the vehicle? Why not just tell the suspension to adjust to the temperature? The FCS has a temperature sensor last I checked, simply share that with the main computer and tell the suspension to adjust accordingly. Or take the next step and go for active suspension. Won't the springs and their equivalent suffer the same fate? Spring can break under high localized pressure, they also wear out faster this way. It is just another mechanism of wear. Leaf spring suspension is also lighter, less complex and cheaper too, why are we not using it? The same argument was used in the 1940s against torsion bar. Simply begin kneeling before reaching the prepared firing spot? It should not really make a difference on relatively flat terrain.
  17. Xoon
    Damn, correct. I would also add that it had a domestic turret and used ordinary steel plates.
  18. Xoon
    Finally got some internet again. So I have a hard one for you guys. What makes this Landsverk L-120 unusual?
  19. Xoon
    IKV 90:
  20. Xoon
    This is genius. Using Neural networks to make ads. Using the virtual space of the internet to do millions of simulations a day. This is just GENIUS. You can't do this in reality, as every sheet of paper costs money, but in virtual reality, you can make trillions of copies without costing a dime. The possibilities are just endless.
  21. Xoon
    I am highly skeptical to this law. Considering all the policing, witch hunts, smear campaigns and the "It is a automated system, therefor, we are not actually acting like a Totalitarian police state with very vague rules to allow us to ban indiscreetly anyone we like , it is just some bugs ;)" we see in mayor social media platforms. Most youtubers are switching to patron type income because they are shut down for questionable reasons. The Nazi's just wanted to clean out the inferior, degenerate part of humanity. To make sure only the best suited would lead on the next era of humanity. They only had good intentions right? Well, history speaks for itself. If they pull it off as they claim. Kudos to them. But I am sure they have a few hidden intentions. And if not, then the next generation will exploit it.
  22. Xoon
    A question to the guys here that have experience with repairing cars. I got a Volvo V50 2007, 1,6L TDI, FWD. 190 000 Km. Sometimes, when the car runs at right below 2000RPM, usually in fourth gear going 60-70Kp/h, up a slight hill, engine running a little heavy, the steering wheel begins to shake and the car loses power slowly. When I press the accelerator, the steering wheel begins to shake more and more, and it feel like the engine begins to shake a lot, though I have not dared to give too much gas, in fear of damaging the engine. The engine gains in practice zero power, fuel usage stays almost the same. What seems to temporarily fix the issue, is the downshift, rev the engine, and the problem is gone. Sometimes I need to downshift two gears. Fuel consumption usually sits around 6,0L per 100km, when it happens. It has happened once in second gear. The engine also has had issues with small "coughs" where it loses power for a very short periods, usually 1-3 in a row, then gone. In some very bad cases, the engine loses all power for a second, feeling like someone slammed the brakes for a second. About, three months ago, a yellow engine lamp also appeared for about a week, then went away. It has also been on service in that time, nothing bad found apart from a broken heater. The problem has bothered the car for a couple of years now, but recently it has gotten progressively worse, happening more and more often. The mechanics have not found anything.
  23. Xoon
    Basically a large push switch connected to a relay that activates one or two shaped charges? Seems to me like it.
  24. Xoon
    New engine basically and suspension? MTU 890 V12 and hydropneumatic suspension?
  25. Xoon
    My bad, but wasn't it one of the prototypes also for the Europanzer? This image is commonly used for the Europanzer.
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