Jump to content
Please support this forum by joining the SH Patreon ×
Sturgeon's House

Xoon

Contributing Members
 View Profile  See their activity

  • Posts

    548

  • Joined

  • Last visited

  • Days Won

    8

 Content Type 

Everything posted by Xoon

  1. Xoon
    Are you sure you can use compound turbo and a ordinary turbo? Wont the compound turbo rob the exhaust of all its energy? Also, will the engine run at a constant rpm? If not, I am not sure if a compound turbo would be worth it. If you want the maximum out of the turbo, you can use a 3 stage turbo setup, and small, medium and large turbo to cover the entire range and pressure. I don't remember if variable geometry turbos are invented yet. Also, is the vehicles auxiliary power, powered by the exhaust? Why do the driver need theses gears? Also, if you want better economy, why not simply have a economy and power option for the driver. How weld-able is this magnesium alloy?
  2. Xoon
    Not really, you can make gasoline engines with high start torque too. To main reason diesel is used by the military is fuel efficiency. The issue with having a good torque curve on a gasoline car usually gives it horrible fuel economy. Just remember to factor in how huge exhaust can get. Especially turbo exhausts. And I am all for special engines.
  3. Xoon
    Add a bit of methanol, and they will learn quickly. While true, it does not translate into engine power. Look at every hypercar, they run on gasoline, and in some cases E85. I am most concerned about the intake and exhaust, cooling should be a non issue if it is watercooled.
  4. Xoon
    I don't really see the advantage to this design. What about a Ethanol powered Turbocharged V12? Nowhere in the rules does it state that it needs to be diesel. And a ethanol engine would blow other engines out of the water when it comes to power density. Also, I would consider ethanol as more progressive and environmentally friendly, fitting for such a glories nation as ours. Rotary is also possible. One thing I have been curious about, is if it is possible to make a X opposed piston, were the piston heads have a wedge shape, and four cylinders meet in the center. Though, simply increasing cylinder volume might be more effective.
  5. Xoon
    Quick question: Minimal structural thickness for a 40 ton vehicle in Alu is 45mm, but can do do something like 25mm Alu + 50mm air + 20mm Alu? Imagine using a pipe, instead of a solid metal piece. Would be useful for inserts. Also done some more work on the chassis:
  6. Xoon
    I think I am done with my suspension, for now: It comes out at roughly 350 kilograms. I would say probably closer to 400kg though. On the hull:
  7. Xoon
    I might run with such a suspension design, seems more leak proof than a vane motor. Honestly, I might be putting way to much time into the suspension unit, but hey, at least I know how pretty much all the hydropneumatic suspension units work in AFVs.
  8. Xoon
    Been refining the suspension, currently done with the suspension arm: Next on the agenda is the suspension mount: Currently work is progress. This is all I am going to do today, its waaay to late:
  9. Xoon
    pft, who needs turrets anyways? Anyways, completed my suspension unit: If anyone is interested in knowing how the suspension works, feel free to ask.
  10. Xoon
    Just to prove that it actually fits the crew. The dummy is 1,8m tall, so a bit taller than the California standard. Its actually surprisingly roomy, more roomy than I expected.
  11. Xoon
    Now I am intrigued. I would assume they simply used a shell that could penetrate something like a 50mm steel plate, found the needed thickness for the other material, and divided it by the total mass. For example: A 50mm steel plate would stop shell A. A 150mm aluminum plate would stop shell A. Aluminum is close to 1/3 the weight of steel. Therefor: 3 times the thickness divided by 1/3 the weight would equal a mass efficiency of 1. Extremely simplified of course.
  12. Xoon
    Its seems the new gun wont fit. It also looks hilariously out of proportion compared to the rest of the vehicle.
  13. Xoon
    As you wish her majesty, the most Gracious and Serene Queen Feinstein VIII! We have recently introduced our new gender equity policy and" taken care of" our excess cishet white males. Our new most skilled and autistic genderfluid dyslexic engineers are hard to work for satisfy your needs! No less than 8 inches! We will make sure all our guns satisfy your needs! Long live our Great and divine Queen for a thousand years! Let her words be heard! (On a side note, got damn, now I need to fit a huge 200mm gun into my poor, tiny, special panser. )
  14. Xoon
    Let me fix that for you. I can actually go up to about 1100mm wide tracks. Though I am heavily considering going for 1600mm tracks and go crazy with 1000mm thick side armor. Though it would probably look ugly. Its not that bad actually. I just used a very unconventional layout.
  15. Xoon
    Been working on the armor array and refining the drive train, gotten pretty happy with the side armor. Next I need to figure out a good suspension layout. Does 1000mm wide tracks with lift-able roadwheels to make turning easier sound like overkill? Not sure about contact length yet, the vehicle is 4,5m currently, so maybe 3,5m? That would be very roughly 7m2 of contact area if the contract are was a flat metal sheet. That be about 0,57kg/cm2.
  16. Xoon
    If the diameter of a round is larger than the thickness of the material, would it effect its effectiveness?
  17. Xoon
    Quick follow up: Does overmatch play a role? ( 5mm HHA equals 10mm RHAe, vs 12,7mm etc) What about fence/nets?
  18. Xoon
    Quick questions regarding spaced armor and perforated armor: Does the 50mm spaced armor rule count for artillery fragments, autocannons and small arms? (7,62mm, 12,7mm, 20mm etc.). Is the spaced armor rule based on RHAe? (170mm aluminum equals 50mm RHAe, 25mm HHA equals 50mm RHAe etc.) Is our glories republic capable for making perforated armor? Is our glories republic capable of making ribbed armor?
  19. Xoon
    If this power creep keeps up, then by the next competition this will happen: "You call that a cannon? THIS IS A REAL CANNON. Your puny 500mm cannon is nothing!"
  20. Xoon
    I feel that the hydrostatic powertrain is about ready. Hydraulics: Flow schematic: EDIT: AND OF COURSE I MESSED UP THE HYDRAULICS. Late nights and pens are a bad combination......
  21. Xoon
    That explains it, I only though about the pistons. I think I will be running with a opposed piston engine, because my special tonk needs to be even more of a special snowflake. I also did a quick mock up: Weights roughly 10 metric ton, made out of aluminum. For now, purely structural (45mm thick). Also, do we know if the filthy enemies rounds bounce at a certain angle, or penetrate more when angled? I remember that the old soviet APFSDS bounced at 75 degrees. Also, CHA and RHA are equal yes?
  22. Xoon
    So simply down rating it would solve that problem? Also, how is a opposed piston unbalanced?
  23. Xoon
    In the mobility section it was talked about reliability, and how the 5TD could be made reliable if done properly. What was wrong with the engine?
  24. Xoon
    Taking your idea, I came up with something like this. A pressure sensor sits on the accumulator. When the accumulator compresses, it compresses a hydraulic fluid which controls the engine throttle, the more the accumulator is compressed, the less throttle the engine gets. Also, when at the dead bottom, it activates a valve which decouples the prime mover from the pump and locks it hydraulically, while also bypassing it with a check valve. I could add a hydraulic/pneumatic PID for more precise control. Also note that the control lines are simplified, and probably will be changed to better reflect their behavior later. And thanks, I almost flipped my table when I noticed the missing line. Luckily it is too heavy. EDIT: Updated my schematic with a PID, am wondering if I should use a electric PID instead of a hydraulic. A worry would be lack of pressure could stop the system. I think I might need a separate flow chart for the control engineering. One schematic for the main hydraulics, and one for the control scheme. Edit: Damn, the spring in the clutch cylinder is on the wrong side. Please ignore.
  25. Xoon
    So I have been working on a schematic for my hydrostatic transmission. In short, its a hydraulic open circuit. A swash plate pump delivers the power to the system. A over pressure valve makes sure excess pressure and pressure spikes are vented into the reservoir. The power is split by a distributor valve, acting as a sort of differential lock in the case of a track slipping. The flow is then regulated by a flow valve that feeds into a direction changer valve. It feeds the hydraulic motor, also a swash plate motor. In parallel, it has a freewheel valve for when you simply want the vehicle to rotate freely. Both feed back into the reservoir. A accumulator is also hooked into the high pressure side of the system, providing regenerative breaking and smoothing out the power delivered to and from the motors. This is just a first draft, I will most likely add more safety features and refine the system. Also it lacks the auxiliary equipment like the suspension. I am also researching ways of making the pump more efficient past simply running constantly and the excess pressure being vented into the reservoir, wasted. Maybe also making the pump into a starter for the engine. I also lack the oil cooler. I have been pondering on using two engines to power the system, one for each motor, or two pumps. The issue would be that power could not be shared between the motors and same with regenerative breaks. I am also working on the hydropneumatic suspension. This is a schematic for the front and rear most road wheels. Pressure is feed into a 3/4 valve which is used elevate the roadwheel, a over pressure valve is used to regulate the amount it elevates. Outside of that, the pressure is fed though a over pressure valve that regulates the height of the suspension. Then a accumulator is coupled in parallel to provide the "springyness". Before the hydraulic cylinder is a flow valve, which regulates the amount of flow, that is used to modify the stiffness of the suspension. This system is feed by the open circuit shown above in the first picture. And yes, everything is written in Norwegian, because diversity, a core principle of the most supreme state. And yes, it was all hand written while cutting steel, because I lack proper schematic software.
×
×
  • Create New...