BPBlueprintAtlas · v1.0

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Weapons & Armor

Historic mechanisms of force.

10 / 10 sheets

Revised 2026

Medieval Longsword

Sheet 001

Medieval Longsword

A hilt long enough for two hands, a tapered double-edged blade, a pommel counter-weighted to keep the balance close to the grip. Treatises by Liechtenauer and Fiore describe every cut and thrust the weapon affords.

Length: 100 – 130 cmBlade: 80 – 110 cmWeight: 1.1 – 1.8 kg
English Longbow

Sheet 002

English Longbow

A single stave of yew with the natural heartwood/sapwood layering left intact — the sapwood stretches on the back, the heartwood compresses on the belly. A lifetime of training left archers with visibly deformed shoulders.

Length: 1.8 – 2.1 mDraw weight: 80 – 160 lbfRange: ~200 m
Plate Armor

Sheet 003

Plate Armor

Curved, differentially hardened plates deflect weapons rather than absorb them. Weight is distributed across the body, not hung from the shoulders — a trained knight could run, climb, and mount a horse unaided.

Weight: 20 – 30 kgMaterial: Hardened medium-C steelArticulation: Every major joint
Katana

Sheet 004

Katana

Clay-differential hardening draws a sharp boundary — the hamon — between a hard martensitic edge and a tough pearlitic spine. Each swordsmith’s hamon is a signature; each folded bloom of tamahagane, an argument about carbon.

Blade (nagasa): 60 – 80 cmCurvature (sori): 1 – 2 cmSteel: Folded tamahagane
Roman Gladius

Sheet 005

Roman Gladius

Short, stiff, point-first. Roman close-quarters doctrine relied on disciplined formations of shielded infantry stabbing in unison — a thrusting weapon was simpler to learn, kept soldiers behind their shield line, and proved devastatingly effective.

Blade: 60 – 68 cmWeight: ~0.9 – 1 kgPaired with: Scutum (~105×80 cm)
Trebuchet

Sheet 006

Trebuchet

Gravitational potential energy of a massive counterweight, traded for kinetic energy of a stone via a hinged arm and sling. A hundred and fifty years later, cannon would make the trebuchet obsolete overnight.

Counterweight: 5 – 10+ tProjectile: 90 – 140 kgRange: 200 – 400 m
Medieval Crossbow

Sheet 007

Medieval Crossbow

A rotating “nut” stores the drawn string’s force until a light trigger pull releases thousands of newtons. Papal councils tried — unsuccessfully — to ban the weapon, precisely because it made conscripts the equal of lifelong longbowmen.

Prod: Steel, later eraBolt mass: 50 – 90 gRate: ~2 / min
Flintlock Musket

Sheet 008

Flintlock Musket

Flint strikes frizzen, sparks fall into the priming pan, flame passes through the touch hole and lights the main charge. A century of linear tactics — volleys, bayonets, the hollow square — was built around this one mechanism.

Length: ~150 cmCaliber: .75 in (19 mm)Range: ~75 m effective
Viking Shield & Spear

Sheet 009

Viking Shield & Spear

Legends fixate on axes and swords; the typical free Norseman carried a round plank shield and a broad-headed spear. Linked in a skjaldborg — shield wall — they were the main building block of Viking Age battle.

Shield Ø: 80 – 90 cmShield mass: 4 – 7 kgSpear length: 2 – 3 m
Halberd

Sheet 010

Halberd

Three weapons in one: the spike thrusts, the axe chops, the rear beak hooks knights off their horses. Swiss confederate halberdiers defeated cavalry for two centuries, and today the Swiss Guard still carries one.

Total length: 1.5 – 2.0 mWeight: 2.5 – 3.5 kgUsed by: Swiss & Landsknechts