BGKPJR · Stage 1 — EM Launch Tube

LIVE SIMULATION · REAL-TIME COIL FIRING SEQUENCE

Semi-transparent barrel wall reveals 1,147 NbTi superconducting coil rings. Leading coils pull the pod forward; trailing coils de-energize instantly to prevent back-pull. Blue field line arcs represent the switching magnetic flux pattern.

How It Works

⚡

Coilgun Principle

Unlike a railgun (which uses sliding electrical contact and destroys itself), a coilgun uses pulsed electromagnetic induction. Each NbTi coil is energized briefly as the pod approaches, then switched off the moment the pod passes — eliminating back-pull drag. No physical contact. No wear.

1,147 coils · 87 μs switching window

🧲

NbTi Superconducting Coils

Niobium-titanium wound at 4.2 K (liquid helium temperature) achieves zero electrical resistance. The 8 Tesla peak peak field threads through the pod's superconducting armature, coupling kinetic energy directly. Cryogenic infrastructure draws 240 kW — amortized across daily launches.

NbTi (Niobium-Titanium) · 4.2 K (liquid helium) · 8 Tesla peak

🌬️

Evacuated Bore

The 5 m diameter bore is pumped to 0.001 atm — eliminating aerodynamic drag for the full 28.7 km acceleration run. At Mach 3.5, a 0.001 atm residual pressure creates negligible drag. The seal at the muzzle maintains vacuum until the millisecond of exit.

0.001 atm · 5 m bore · 13 m OD

📐

15° Elevation Angle

The tube is inclined at 15° — steep enough to clear the atmosphere efficiently, shallow enough to keep the muzzle elevation manageable. The pod exits into thinning air at ~4 km altitude, where the Gryphon Wing deploys to continue acceleration using the atmosphere as free propellant.

15° incline · 70g peak acceleration · 3.5 Mach exit

900 MJ in 23 Seconds

Complete firing sequence — from pre-charge to seal rupture

T−420s Begin coil pre-charge

T−60s Vacuum pump-down to 0.001 atm

T−5s Cryogenic coils at 4.2 K, all 1,147 confirmed

T 0 Pod loaded at breach, seal inserted

T+0s Coil firing sequence initiated — 900 MJ release

T+23s Pod exits muzzle at Mach 3.5 · 4,287 km/h

T+23.05s Seal self-destructs in < 50 μs, bore re-pressurizes

ENERGY RELEASE PROFILE — 900 MJ · 45 GW peak · 23s window

T+0T+6sT+12sT+18sT+23s

The Muzzle Seal

Three-Layer Thermite Membrane

Carbon Fiber Diaphragm 4 mm

Aerogel Buffer 8 mm

Al/Fe₂O₃ Thermite Layer 6 mm

→ BORE (vacuum side)

Carbon Fiber Diaphragm

Primary vacuum boundary — maintains 0.001 atm bore pressure

Aerogel Buffer

Thermal isolation between CF layer and thermite charge

Al/Fe₂O₃ Thermite Layer

Self-consumes in < 50 μs on WC tip contact — zero debris

50 μs SELF-DESTRUCT TIME

4,800 Pa RUPTURE THRESHOLD

ZERO DEBRIS THERMITE BURNS CLEAN

The WC tip of the incoming pod contacts the CF diaphragm at Mach 3.5. The impact shockwave initiates the thermite layer — which consumes itself completely in under 50 microseconds. No debris enters the atmosphere. No contamination of the pod's aerodynamic envelope.

Nose Cone Architecture

Manna Penetrator Type 1 — 5-layer penetrator stack

WC-Co Tip 5 mm

SiC Ogive 22 mm

C/C Composite 18 mm

Duocel® Foam Core 30 mm

Ti-6Al-4V Collar 12 mm

WC-Co Tip

Tungsten carbide-cobalt — initiates seal rupture, handles 12 GPa impact stress

SiC Ogive

Silicon carbide ceramic — hypersonic shockwave shaping, 1400°C rated

C/C Composite

Carbon-carbon thermal protection — ablative shield for muzzle blast

Duocel® Foam Core

Open-cell aluminum foam — decelerates internal components across 300 Gs

Ti-6Al-4V Collar

Titanium structural ring — bonds nose assembly to main body

The penetrator tip sequence is engineered specifically for the exit event: WC-Co absorbs the initial impact with the seal membrane, SiC shapes the hypersonic shockwave, C/C ablates any residual blast heating, Duocel foam distributes deceleration loads across internal payload, and the Ti collar provides structural continuity to the main body.

Full System Specifications

Tube Length28.7 km

Bore Diameter5 m (inner evacuated)

Outer Diameter13 m (structural shell)

Coil Count1,147 NbTi rings

Coil MaterialNbTi (Niobium-Titanium)

Operating Temperature4.2 K (liquid helium)

Peak Magnetic Field8 Tesla peak

Bore Pressure0.001 atm (101 Pa)

Elevation Angle15°

Peak Acceleration70g

Exit SpeedMach 3.5 · 4,287 km/h

Transit Time23 seconds

Stored Energy900 MJ

Peak Power45 GW (during discharge)

Coil Switching Window87 μs per coil

Cryo System Draw240 kW continuous

Charge Time420s (7 min) per launch

Seal DesignThree-Layer Thermite Membrane

Seal Burn Time< 50 μs · zero debris

Nose DesignManna Penetrator Type 1