Second Stage
AssemblyThe one part of the stack that is still thrown away: a single vacuum engine and short tank section that take over near 2 km/s and push the payload to orbital velocity. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.
Second Stage parts and their functions
4 top-level parts · 166,533 parts in total · full bill of materials below
| # | Part | Qty | What it does |
|---|---|---|---|
| 1 | Vacuum Engine 8 parts | 1× | Vacuum variant of the booster engine: same pintle powerhead exhausting through a large radiatively cooled nozzle extension for ~348 s of specific impulse. |
| 2 | Second-Stage Tank 5 parts | 1× | Short Al-Li tank section, the same 3.7 m diameter and weld construction as the booster so both stages share tooling, a manufacturing decision that shows up in the BOM as shared panels and domes. |
| 3 | Propellant Feed System 6 parts | 1× | Stage 2 feed plumbing |
| 4 | Reaction Control System 3 parts | 1× | Coast and settling control |
3D model
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Build & assembly graph
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Bill of materials for Second Stage
4 top-level lines · 57 rows shown · 166,533 parts total · indented to 3 levels| # | Item / sub-assembly | Part no. | Qty/assy | Ext. qty | Parts | Type |
|---|---|---|---|---|---|---|
| 1 | Vacuum Engine 8 parts | reusable-launch-vehicle-vacuum-engine | 1× | 1 | 54,035 | assembly |
| 1.1 | Turbopump 6 parts | orbital-launch-vehicle-turbopump | 1× | 1 | 55 | assembly |
| 1.1.1 | Pump Impeller | orbital-launch-vehicle-pump-impeller | 2× | 2 | · | part |
| 1.1.2 | Pump Inducer | orbital-launch-vehicle-pump-inducer | 2× | 2 | · | part |
| 1.1.3 | Turbine Wheel | orbital-launch-vehicle-turbine-wheel | 1× | 1 | · | part |
| 1.1.4 | Ball Bearing | ball-bearing | 4× | 4 | · | part |
| 1.1.5 | O-Ring Set | oring-set | 6× | 6 | · | part |
| 1.1.6 | Fastener Set | fastener-set | 40× | 40 | · | part |
| 1.2 | Thrust Chamber & Nozzle | orbital-launch-vehicle-thrust-chamber | 1× | 1 | · | part |
| 1.3 | Nozzle Extension | orbital-launch-vehicle-nozzle-extension | 1× | 1 | · | part |
| 1.4 | Pintle Injector 5 parts | reusable-launch-vehicle-pintle-injector | 1× | 1 | 31 | assembly |
| 1.4.1 | Pintle Post | reusable-launch-vehicle-pintle-post | 1× | 1 | · | part |
| 1.4.2 | Pintle Fuel Sleeve | reusable-launch-vehicle-pintle-sleeve | 1× | 1 | · | part |
| 1.4.3 | Injector Manifold | reusable-launch-vehicle-injector-manifold | 1× | 1 | · | part |
| 1.4.4 | O-Ring Set | oring-set | 4× | 4 | · | part |
| 1.4.5 | Fastener Set | fastener-set | 24× | 24 | · | part |
| 1.5 | Engine Valve | orbital-launch-vehicle-engine-valve | 6× | 6 | · | part |
| 1.6 | Multi-Start Ignition System 4 parts | reusable-launch-vehicle-multistart-ignition | 1× | 1 | 10 | assembly |
| 1.6.1 | TEA-TEB Ampoule | reusable-launch-vehicle-teateb-ampoule | 3× | 3 | · | part |
| 1.6.2 | Ignition Manifold | reusable-launch-vehicle-ignition-manifold | 1× | 1 | · | part |
| 1.6.3 | Propellant Valve | orbital-launch-vehicle-propellant-valve | 4× | 4 | · | part |
| 1.6.4 | Relay | relay | 2× | 2 | · | part |
| 1.7 | Engine Controller 5 parts | orbital-launch-vehicle-engine-controller | 1× | 1 | 1,846 | assembly |
| 1.7.1 | Bare PCB | pcb-bare | 2× | 2 | · | part |
| 1.7.2 | Microcontroller | mcu | 2× | 2 | · | part |
| 1.7.3 | SMD Passive (R/C/L) | smd-passives | 1800× | 1,800 | · | part |
| 1.7.4 | Connector | connector | 30× | 30 | · | part |
| 1.7.5 | Pressure Sensor | pressure-sensor | 12× | 12 | · | part |
| 1.8 | Engine Plumbing & Hardware 6 parts | orbital-launch-vehicle-engine-plumbing | 1× | 1 | 52,085 | assembly |
| 1.8.1 | Engine Gimbal Actuator | orbital-launch-vehicle-gimbal-actuator | 2× | 2 | · | part |
| 1.8.2 | Torch Igniter | orbital-launch-vehicle-igniter | 2× | 2 | · | part |
| 1.8.3 | Engine Heat Exchanger | orbital-launch-vehicle-heat-exchanger | 1× | 1 | · | part |
| 1.8.4 | Engine Line | orbital-launch-vehicle-engine-line | 80× | 80 | · | part |
| 1.8.5 | Brazed Joint | orbital-launch-vehicle-brazed-joint | 40000× | 40,000 | · | part |
| 1.8.6 | Tube Fitting | orbital-launch-vehicle-tube-fitting | 12000× | 12,000 | · | part |
| 2 | Second-Stage Tank 5 parts | reusable-launch-vehicle-upper-tank | 1× | 1 | 110,017 | assembly |
| 2.1 | Tank Barrel Panel | orbital-launch-vehicle-tank-barrel-panel | 4× | 4 | · | part |
| 2.2 | Tank Dome | orbital-launch-vehicle-tank-dome | 3× | 3 | · | part |
| 2.3 | Slosh Baffle | orbital-launch-vehicle-slosh-baffle | 6× | 6 | · | part |
| 2.4 | Structural Fastener | orbital-launch-vehicle-structural-fastener | 110000× | 110,000 | · | part |
| 2.5 | Pressure Sensor | pressure-sensor | 4× | 4 | · | part |
| 3 | Propellant Feed System 6 parts | orbital-launch-vehicle-feed-system | 1× | 1 | 2,461 | assembly |
| 3.1 | Propellant Feed Line | orbital-launch-vehicle-feed-line | 4× | 4 | · | part |
| 3.2 | Propellant Valve | orbital-launch-vehicle-propellant-valve | 14× | 14 | · | part |
| 3.3 | Pogo Accumulator | orbital-launch-vehicle-pogo-accumulator | 1× | 1 | · | part |
| 3.4 | Pressurization System 5 parts | orbital-launch-vehicle-pressurization-system | 1× | 1 | 38 | assembly |
| 3.4.1 | COPV Pressure Vessel | orbital-launch-vehicle-copv | 4× | 4 | · | part |
| 3.4.2 | Pressure Regulator | orbital-launch-vehicle-pressure-regulator | 2× | 2 | · | part |
| 3.4.3 | Check Valve | orbital-launch-vehicle-check-valve | 6× | 6 | · | part |
| 3.4.4 | Helium Line | orbital-launch-vehicle-helium-line | 20× | 20 | · | part |
| 3.4.5 | Pressure Sensor | pressure-sensor | 6× | 6 | · | part |
| 3.5 | Fill & Drain Valve | orbital-launch-vehicle-fill-drain-valve | 4× | 4 | · | part |
| 3.6 | Duct Flange Joint | orbital-launch-vehicle-flange-joint | 2400× | 2,400 | · | part |
| 4 | Reaction Control System 3 parts | orbital-launch-vehicle-rcs | 1× | 1 | 20 | assembly |
| 4.1 | Cold-Gas Thruster | orbital-launch-vehicle-cold-gas-thruster | 8× | 8 | · | part |
| 4.2 | COPV Pressure Vessel | orbital-launch-vehicle-copv | 2× | 2 | · | part |
| 4.3 | Propellant Valve | orbital-launch-vehicle-propellant-valve | 10× | 10 | · | part |
Where the second stage is used
1 product across 1 domain contain it, directly or inside a sub-assemblyUsed in 1 assembly
Sourcing: possible vendors
Prices, MOQ, and lead times are algorithmic estimates, not quotes, and not claims about these companies. Company mappings are curated by keyword; est. price band $0.50–$100. How estimates work| Vendor | HQ | Specialty | MOQ | Lead time |
|---|---|---|---|---|
|
🇨🇳Foxconn
foxconn.com ↗
|
Shenzhen, CN | Electronics contract mfg | 1,000 pcs | 6–10 wks |
| flex.com ↗ | Singapore | Electronics contract mfg | 1,000 pcs | 6–10 wks |
| dixoninfo.com ↗ | Noida, IN | Electronics contract mfg | 1,000 pcs | 6–10 wks |
| bydelectronic.com ↗ | Shenzhen, CN | Electronics contract mfg | 1,000 pcs | 6–10 wks |
| venture.com.sg ↗ | Singapore | Electronics contract mfg | 1,000 pcs | 6–10 wks |