GunSpec

All 44 examples

Tools

Load carriage cost

  1. 1

    A person asks

    • How much more energy does a 20 km march cost carrying an FN SCAR-L than an HK416, with seven magazines and 25 kg of kit?
  2. 2

    The assistant calls the tool

    tools/call
    json
    {  "name": "gunspec_load_carriage",  "arguments": {    "ids": [      "hk416",      "fn-scar-l"    ],    "magazines": 7,    "kit_kg": 25,    "distance_km": 20  }}
  3. 3

    The server answers

    Result
    json
    {  "model": {    "id": "lcda",    "name": "LCDA backpacking equation with the LCDA graded-walking term",    "equation": "M (W/kg body mass) = Mrest + (0.19 + η(1.78·S^0.58 + 0.27·S^4 + Mgrade)) · (1 + 1.96·L^1.36); Mgrade = 34·S·G·(1 − 1.05^(1 − 1.1^(100·G + 32))); S in m/s, G as rise/run, L = load ÷ body mass; Mrest from Cunningham (1991): (500 + 22·lean mas…",    "citations": [      {        "authors": "Looney DP, Lavoie EM, Vangala SV, Holden LD, Figueiredo PS, Friedl KE, et al.",        "year": 2022,        "title": "Modeling the Metabolic Costs of Heavy Military Backpacking",        "journal": "Medicine & Science in Sports & Exercise 54(4):646-654",        "doi": "10.1249/MSS.0000000000002833"      },      {        "authors": "Looney DP, Santee WR, Hansen EO, Bonventre PJ, Chalmers CR, Potter AW",        "year": 2019,        "title": "Estimating Energy Expenditure during Level, Uphill, and Downhill Walking",        "journal": "Medicine & Science in Sports & Exercise 51(9):1954-1960",        "doi": "10.1249/MSS.0000000000002002"      },      {        "authors": "Soule RG, Goldman RF",        "year": 1972,        "title": "Terrain coefficients for energy cost prediction",        "journal": "Journal of Applied Physiology 32(5):706-708",        "doi": "10.1152/jappl.1972.32.5.706"      }    ],    "validated": {      "speedMps": [        0.45,        1.97      ],      "loadFraction": [        0,        0.66      ]    }  },  "march": {    "bodyMassKg": 80,    "bodyFatPct": 15,    "kitKg": 25,    "magazines": 7,    "speedKmh": 4.8,    "speedMps": 1.333,    "gradePct": 0,    "terrain": "paved",    "terrainFactor": 1,    "distanceKm": 20,    "durationS": 15000,    "defaulted": [      "body_mass_kg",      "body_fat_pct",      "speed_kmh"    ]  },  "attachments": [],  "results": [    {      "firearm": {        "id": "hk416",        "name": "HK416",        "magazineType": "detachable_box",        "magazineCapacity": 30      },      "load": {        "firearmEmptyG": 3020,        "loadedMagazineG": 400,        "magazines": 7,        "magazinesG": 2800,        "attachmentsG": 0,        "carriedG": 5820,        "totalLoadKg": 30.82,        "loadFraction": 0.385,        "sources": {          "firearmEmptyG": "catalogue",          "loadedMagazineG": "derived"        }      },      "cost": {        "watts": 483.2,        "wattsPerKg": 6.04,        "energyKj": 7248.2,        "energyKcal": 1732.4      },      "delta": null,      "warnings": [],      "error": null    },    {      "firearm": {        "id": "fn-scar-l",        "name": "FN SCAR-L",        "magazineType": "detachable_box",        "magazineCapacity": 30      },      "load": {        "firearmEmptyG": 3500,        "loadedMagazineG": 490,        "magazines": 7,        "magazinesG": 3430,        "attachmentsG": 0,        "carriedG": 6930,        "totalLoadKg": 31.93,        "loadFraction": 0.399,        "sources": {          "firearmEmptyG": "catalogue",          "loadedMagazineG": "derived"        }      },      "cost": {        "watts": 489.9,        "wattsPerKg": 6.12,        "energyKj": 7347.9,        "energyKcal": 1756.2      },      "delta": {        "carriedG": 1110,        "watts": 6.6,        "energyKj": 99.7,        "energyKcal": 23.8      },      "warnings": [],      "error": null    }  ]}

    Captured from the live API on Oct 22, 2026. Lists and long text are shortened for display.