# Sovereignty Module: Build the Forge

## Complete Primitive Forge and Bellows Construction: From Clay to Iron Heat

A forge is the heart of metalworking. This campaign covers forge types, bellows construction, fire management, and achieving working temperatures for iron and steel.

### Chapter 1: Forge Types

| Forge Type | Max Temperature | Difficulty | Materials | Best For |
|---|---|---|---|---|
| Ground forge (bowl) | 2,000°F+ | Very low | Hole in ground, clay lining | Emergency, temporary |
| Side-blast forge | 2,200°F+ | Low | Clay/brick, tuyere pipe | General blacksmithing |
| Bottom-blast forge | 2,400°F+ | Moderate | Clay/brick, tuyere from below | Heavy forging, welding |
| Brick forge (permanent) | 2,400°F+ | Moderate | Firebrick, mortar, steel | Permanent shop |
| Japanese-style box bellows | 2,200°F+ | Moderate | Wood, leather, clay | Blade smithing |

Side-blast forge construction: 1) Build fire pot: clay-lined bowl or firebrick box (12-18 inches across, 6-8 inches deep). 2) Tuyere: pipe entering from the side at bottom of fire pot (1-1.5 inch diameter). 3) Tuyere material: steel pipe, clay pipe, or copper pipe. 4) Tuyere angle: slightly upward (prevents ash from clogging). 5) Connect tuyere to bellows via pipe. 6) Ash dump: removable plug or door below fire pot. 7) Work surface: flat area around fire pot for tools and stock. 8) Height: 30-36 inches (comfortable standing height). 9) Hood/chimney: optional but recommended for indoor use. 10) Quench trough: water container within arm's reach.

### Chapter 2: Bellows Construction

| Bellows Type | Air Output | Difficulty | Materials | Continuous Air |
|---|---|---|---|---|
| Mouth blowing (blowpipe) | Very low | None | Tube | No (intermittent) |
| Bag bellows (skin bag) | Low-moderate | Low | Animal skin, nozzle | No (intermittent) |
| Single-action bellows | Moderate | Moderate | Wood, leather, nails | No (air on squeeze only) |
| Double-action bellows | High | Moderate-high | Wood, leather, valves | Yes (air on push and pull) |
| Box bellows (piston) | High | Moderate | Wood, piston, valves | Yes (continuous) |
| Hand-crank blower | Very high | High | Metal gears, fan | Yes (continuous) |

Double-action bellows: 1) Two chambers share a common nozzle. 2) When top chamber compresses, it pushes air out nozzle. 3) Simultaneously, bottom chamber expands, drawing in fresh air. 4) When top chamber expands, bottom compresses. 5) Result: continuous airflow regardless of handle direction. 6) Construction: two hinged boards per chamber, leather sides. 7) Each chamber has an intake valve (flap that opens inward only). 8) Both chambers connect to single output pipe (nozzle). 9) Handle operates both chambers in opposition. 10) Size: 18-24 inches long for blacksmithing. 11) Leather must be supple (oil regularly). 12) Valves must seal well (air leaks reduce efficiency).

### Chapter 3: Fire Management

| Temperature | Color | Use | Fuel Needed |
|---|---|---|---|
| 400-500°F | No visible color | Tempering | Light fire |
| 900-1,000°F | Faint red (dark) | Annealing | Moderate fire |
| 1,100-1,200°F | Cherry red | Forging (easy bending) | Good fire |
| 1,400-1,500°F | Bright cherry to orange | Forging (heavy work) | Hot fire |
| 1,700-1,800°F | Light orange to yellow | Forging (maximum workability) | Very hot fire |
| 2,000-2,100°F | Light yellow to white | Forge welding (iron) | Maximum fire |
| 2,300°F+ | White, sparking | Forge welding (steel), burning | Extreme (risk of burning steel) |

Fire management principles: 1) Build fire with charcoal (not wood; charcoal burns hotter and cleaner). 2) Bank fire: pile charcoal around and over the work piece. 3) Air blast from bellows heats the fire zone directly above the tuyere. 4) More air = hotter fire (up to a point; too much air cools by excess). 5) Clinker: fused ash that blocks airflow; remove regularly. 6) Fire size: match to work piece (small work = small fire). 7) Deep fire for even heating (bury work piece in charcoal). 8) Shallow fire for localized heating (expose only the area to be worked). 9) Oxidizing fire: excess air, burns carbon from steel surface. 10) Reducing fire: limited air, protects steel from carbon loss.

### Chapter 4: Anvil and Tools

| Tool | Function | Material | Priority |
|---|---|---|---|
| Anvil (or substitute) | Work surface for hammering | Steel, large rock, railroad track | Essential |
| Hammer (2-3 lbs) | Primary forging tool | Steel head, wood handle | Essential |
| Tongs (various) | Hold hot metal | Steel | Essential |
| Hardy (cutting tool) | Cut hot metal | Steel, fits in anvil hardy hole | Very important |
| Punch | Make holes in hot metal | Steel rod | Very important |
| Chisel (hot cut) | Cut hot metal | Steel | Very important |
| Wire brush | Clean scale from metal | Steel wire | Important |
| Quench bucket | Cool metal, harden steel | Water or oil in metal bucket | Essential |

### Chapter 5: First Projects

| Project | Skills Practiced | Difficulty | Time | Steel Needed |
|---|---|---|---|---|
| S-hook | Drawing out, bending, scrolling | Very low | 15-30 min | 1/4 inch round, 8 inches |
| Nail | Drawing to a point, heading | Low | 10-20 min | 1/4 inch square, 4 inches |
| J-hook | Bending, tapering, punching | Low | 20-30 min | 3/8 inch round, 10 inches |
| Bottle opener | Flattening, punching, bending | Low-moderate | 30-45 min | 3/8 inch round, 8 inches |
| Knife (simple) | Drawing, tapering, grinding, heat treat | Moderate | 2-4 hours | Flat bar or old file |
| Tongs | Drawing, bending, riveting | Moderate-high | 2-4 hours | 1/2 inch round, 18 inches x2 |
| Fire poker | Drawing, bending, scrolling | Low | 30-60 min | 3/8 inch round, 30 inches |

### Reference Card

1. Charcoal is the only proper forge fuel (wood does not burn hot enough for ironwork; charcoal reaches the temperatures needed for forging and welding). 2. Air makes the heat (the bellows is as important as the forge itself; without forced air, charcoal cannot reach forging temperature). 3. Double-action bellows provide continuous air (a single-action bellows only blows on the squeeze; double-action provides air on both push and pull). 4. Color tells temperature (learn to read heat colors in dim light; cherry red is forging heat, yellow-white is welding heat). 5. Remove clinker regularly (fused ash blocks airflow and creates cold spots; clean the fire pot between heats). 6. The anvil is the second most important tool (after the hammer; any heavy, flat, hard surface works as an anvil in a pinch). 7. Start with S-hooks (the S-hook teaches drawing out, bending, and scrolling; make fifty before moving to harder projects). 8. Quench within reach (hot metal must be cooled quickly for hardening; keep the quench bucket within arm's reach of the anvil).