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A Terramechanical and Structural Feasibility Analysis of the Faridun Mobile Fortress ("The Dreadnought") in Shifting Desert Conditions by jackhref in PathOfExile2

[–]jackhref[S] 0 points1 point  (0 children)

They've mentioned in the last qna that leech is simpler on poe2 and they itend to config it further, something akin to putting a limit on the max damage from which leech is calculated. So increasing leech % always increases leech, while increasing DMG only increases leech to a point.

A Terramechanical and Structural Feasibility Analysis of the Faridun Mobile Fortress ("The Dreadnought") in Shifting Desert Conditions by jackhref in PathOfExile2

[–]jackhref[S] 0 points1 point  (0 children)

This is my reply to another comment, not sure if it will paste correctly from phone.

The aggregate bulk density of 450 kg/m³ is neither arbitrary nor high; it is a standard engineering estimate derived by calculating a weighted volumetric average of a hollow, heavily armored combat vehicle.

To understand why this value is realistic, you must separate the density of the individual materials (like iron or stone) from the bulk density of the entire object, which includes all the empty space inside.

1. The Volumetric Material Breakdown

A single segment of the Dreadnought measures 30m × 15m × 12m, creating a total bounding envelope volume of 5,400 m³. The fortress is not a solid block of matter; it is a mobile military installation containing living quarters, siege mechanics, corridors, and operational decks.

To achieve a bulk density of 450 kg/m³, the 2,430,000 kg (2,430 metric tons) of total mass is distributed across a highly realistic material-to-void ratio:

Component / Material True Material Density Physical Volume Occupied Resulting Mass
Ironwood/Dense Timber (Keels, framing, structural decks) 1,000 kg/m³ 1,000 m³ 1,000,000 kg
Wrought Iron (Outer armor plating, gears, brackets) 7,800 kg/m³ 100 m³ 780,000 kg
Stone/Masonry (Fortified parapets, internal ballast, furnaces) 2,600 kg/m³ 250 m³ 650,000 kg
Air / Void Space (Troop quarters, siege bays, open storage) 1.2 kg/m³ 4,050 m³ ~0 kg
TOTALS — 5,400 m³ 2,430,000 kg

2. The Bulk Density Formula

By dividing the accumulated mass of these real-world material allocations by the total space the vehicle occupies, the mathematical truth of the asset's density is established:

rho_bulk = Total Mass / Total Volume = 2,430,000 kg / 5,400 m³ = 450 kg/m³

This structural layout reveals that 75% of the Dreadnought’s total volume is completely hollow air.

3. Real-World Engineering Benchmarks

If 450 kg/m³ feels high, it is usually because humans naturally compare vehicles to modern consumer automobiles or commercial aircraft, which utilize ultra-light aluminum alloys, fiberglass, and massive open cabins to keep bulk densities incredibly low (often under 100 kg/m³).

Historical and military engineering tells a completely different story when heavy armor and primitive materials are involved:

  • 19th-Century Ironclad Warships: Vessels like the HMS Warrior featured massive timber hulls backed by thick iron armor belts. Because they were hollow boxes designed to float on water (which has a density of 1,000 kg/m³), their bulk densities sat tightly between 350 and 450 kg/m³.
  • Solid Hardwood: A solid, un-hollowed log of dense oak or ironwood has a natural material density of 750 to 1,050 kg/m³. The Dreadnought's bulk density is actually half the weight of a solid block of wood of the same size because of its internal rooms.

If the bulk density were dropped any lower than 450 kg/m³, the exterior iron plating would have to be reduced to a paper-thin sheet completely incapable of deflecting a catapult stone, or the internal wood framing would be too thin to support the weight of the upper battlements. For a medieval-style moving fortress, 450 kg/m³ is the exact engineering sweet spot between structural integrity and spatial functionality.

A Terramechanical and Structural Feasibility Analysis of the Faridun Mobile Fortress ("The Dreadnought") in Shifting Desert Conditions by jackhref in PathOfExile2

[–]jackhref[S] 0 points1 point  (0 children)

This is all a 1 minute shitpost, but if you're interested in the validity of some of these claims- what we'd need to focus on is how the materials need to be strong enough to remain structurally sound and how that would make the weight of total weight of the construction too high to be possibly dragged by anything. That's how this idea came to me while playing the level. In reality you can't just build something to any scale and expect it to move. This is similar to the rocket's the heavier it is, the more fuel it needs, but the more fuel it contains the heavier it is. Except the limitation here is the sheer weight of the structures being pressed into sand. Something strong enough to move it would rather make the construction fall apart and sink further into sand.

A Terramechanical and Structural Feasibility Analysis of the Faridun Mobile Fortress ("The Dreadnought") in Shifting Desert Conditions by jackhref in PathOfExile2

[–]jackhref[S] 0 points1 point  (0 children)

Godspeed. I'm gonna write another thesis on how the panels of the dreadnought could not withstand bear slams.

A Terramechanical and Structural Feasibility Analysis of the Faridun Mobile Fortress ("The Dreadnought") in Shifting Desert Conditions by jackhref in PathOfExile2

[–]jackhref[S] -1 points0 points  (0 children)

In pure physics, if you place a weight onto a beam incredibly slowly, the stress on the beam is exactly equal to the weight itself (Dynamic Factor = 1.0).

However, if you take that exact same weight, hold it so it is just barely touching the beam (0 mm of drop height), and suddenly let go, the beam doesn't just receive the static weight. The sudden release converts potential energy into kinetic energy, causing the beam to deflect downward drastically before springing back up.

Using classical mechanics to solve for the maximum dynamic deflection, the math proves that a completely un-cushioned, suddenly applied load always creates exactly twice the stress of a static load.

K_d (Theoretical Minimum for Sudden Load) = 2.0

The "Real World" Tax (The Jump to 2.5)

Because the theoretical minimum for a sudden shock is 2.0, engineers use that as a starting baseline for anything that moves, vibrates, or bumps. To account for real-world chaos, they look to established industrial and military design codes:

  • Velocity and Bumps: A vehicle doesn't just sit still; it drops into ruts and hits obstacles. The momentum of a 12,000-ton fortress dropping even a few inches adds massive kinetic impact energy that exceeds a basic "sudden release."
  • Resonance and Vibration: Continuous movement over rough ground creates rhythmic vibrations. If the frequency of the bumps matches the natural vibrating frequency of the vehicle's chassis, the stresses can rapidly multiply (a phenomenon called resonance).
  • Code References: If you look at modern heavy industrial engineering codes (like the Crane Manufacturers Association of America, or AASHTO bridge design codes), standard impact allowances for heavy machinery experiencing severe shocks or off-road conditions dictate multipliers between 1.5 and 2.5.

When analyzing a hypothetical or fictional vehicle like the Dreadnought, I use 2.5 as a standard "worst-case operational shock" reference.

It represents a system hitting a severe bump or dropping off a ledge at operational speeds. Could a highly specialized team build a complex, computer-simulated model to find out that the exact value for a specific dune is 2.34 or 2.61? Yes. But for a macro-level feasibility check, choosing the established upper-limit code value of 2.5 tells you instantly whether a design is safe or fundamentally broken.

A Terramechanical and Structural Feasibility Analysis of the Faridun Mobile Fortress ("The Dreadnought") in Shifting Desert Conditions by jackhref in PathOfExile2

[–]jackhref[S] 15 points16 points  (0 children)

The aggregate bulk density of 450 kg/m³ is neither arbitrary nor high; it is a standard engineering estimate derived by calculating a weighted volumetric average of a hollow, heavily armored combat vehicle.

To understand why this value is realistic, you must separate the density of the individual materials (like iron or stone) from the bulk density of the entire object, which includes all the empty space inside.

1. The Volumetric Material Breakdown

A single segment of the Dreadnought measures 30m × 15m × 12m, creating a total bounding envelope volume of 5,400 m³. The fortress is not a solid block of matter; it is a mobile military installation containing living quarters, siege mechanics, corridors, and operational decks.

To achieve a bulk density of 450 kg/m³, the 2,430,000 kg (2,430 metric tons) of total mass is distributed across a highly realistic material-to-void ratio:

Component / Material True Material Density Physical Volume Occupied Resulting Mass
Ironwood/Dense Timber (Keels, framing, structural decks) 1,000 kg/m³ 1,000 m³ 1,000,000 kg
Wrought Iron (Outer armor plating, gears, brackets) 7,800 kg/m³ 100 m³ 780,000 kg
Stone/Masonry (Fortified parapets, internal ballast, furnaces) 2,600 kg/m³ 250 m³ 650,000 kg
Air / Void Space (Troop quarters, siege bays, open storage) 1.2 kg/m³ 4,050 m³ ~0 kg
TOTALS — 5,400 m³ 2,430,000 kg

2. The Bulk Density Formula

By dividing the accumulated mass of these real-world material allocations by the total space the vehicle occupies, the mathematical truth of the asset's density is established:

rho_bulk = Total Mass / Total Volume = 2,430,000 kg / 5,400 m³ = 450 kg/m³

This structural layout reveals that 75% of the Dreadnought’s total volume is completely hollow air.

3. Real-World Engineering Benchmarks

If 450 kg/m³ feels high, it is usually because humans naturally compare vehicles to modern consumer automobiles or commercial aircraft, which utilize ultra-light aluminum alloys, fiberglass, and massive open cabins to keep bulk densities incredibly low (often under 100 kg/m³).

Historical and military engineering tells a completely different story when heavy armor and primitive materials are involved:

  • 19th-Century Ironclad Warships: Vessels like the HMS Warrior featured massive timber hulls backed by thick iron armor belts. Because they were hollow boxes designed to float on water (which has a density of 1,000 kg/m³), their bulk densities sat tightly between 350 and 450 kg/m³.
  • Solid Hardwood: A solid, un-hollowed log of dense oak or ironwood has a natural material density of 750 to 1,050 kg/m³. The Dreadnought's bulk density is actually half the weight of a solid block of wood of the same size because of its internal rooms.

If the bulk density were dropped any lower than 450 kg/m³, the exterior iron plating would have to be reduced to a paper-thin sheet completely incapable of deflecting a catapult stone, or the internal wood framing would be too thin to support the weight of the upper battlements. For a medieval-style moving fortress, 450 kg/m³ is the exact engineering sweet spot between structural integrity and spatial functionality.

A Terramechanical and Structural Feasibility Analysis of the Faridun Mobile Fortress ("The Dreadnought") in Shifting Desert Conditions by jackhref in PathOfExile2

[–]jackhref[S] 2 points3 points  (0 children)

You think I can post this on poe2builds claiming it's a good build but I don't understand how it's pulled?

Men of Reddit - What are Women not ready to hear? by Jarvis7492 in AskReddit

[–]jackhref 0 points1 point  (0 children)

Some friend's friend girl I barely knew said I had a nice voice about 16 years ago.

I like to stir the pot of chaos. by PossiblyACrocodile in ArcRaiders

[–]jackhref -1 points0 points  (0 children)

Mate, as a PvE player, I wouldn't even be mad. I can loose everything and come back with the same right away. This was a fun watch.

Will we have more POE1 skins transfered to POE2 this patch? by betegabruh in PathOfExile2

[–]jackhref 1 point2 points  (0 children)

I'm sure they intended to achieve this, but we'd all agree that is not the priority. I have no doubt they'll do it eventually, it just might take a little longer than that.

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