Descent Propulsion Module Assembly
Pressure-fed throttleable main engine cluster that removes 1.7 km/s of orbital velocity and can deep-throttle to a tenth of full thrust for the final vertical descent. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.
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Bill of materials
4 top-level lines · 22 rows shown · 466 parts total · indented to 3 levels| # | Item / sub-assembly | Part no. | Qty/assy | Ext. qty | Parts | Type |
|---|---|---|---|---|---|---|
| 1 | Throttleable Main Engine 5 parts | lunar-lander-main-engine | 3× | 3 | 6 | assembly |
| 1.1 | Pintle Injector | lunar-lander-pintle-injector | 1× | 3 | — | part |
| 1.2 | Combustion Chamber | lunar-lander-combustion-chamber | 1× | 3 | — | part |
| 1.3 | Engine Nozzle Extension | lunar-lander-engine-nozzle | 1× | 3 | — | part |
| 1.4 | Throttle Valve | lunar-lander-throttle-valve | 2× | 6 | — | part |
| 1.5 | O-Ring Set | oring-set | 1× | 3 | — | part |
| 2 | Engine Control Unit 5 parts | lunar-lander-engine-controller | 1× | 1 | 274 | assembly |
| 2.1 | Bare PCB | pcb-bare | 2× | 2 | — | part |
| 2.2 | Microcontroller | mcu | 2× | 2 | — | part |
| 2.3 | Power MOSFET | mosfet | 12× | 12 | — | part |
| 2.4 | SMD Passive (R/C/L) | smd-passives | 250× | 250 | — | part |
| 2.5 | Connector | connector | 8× | 8 | — | part |
| 3 | Gimbal Actuator 4 parts | lunar-lander-gimbal-actuator | 6× | 6 | 28 | assembly |
| 3.1 | Servo Motor 4 parts | servo-motor | 1× | 6 | 24 | assembly |
| 3.1.1 | Stator Assembly 3 parts + deeper › | stator-assembly | 1× | 6 | 3 | assembly |
| 3.1.2 | Rotor Assembly 4 parts + deeper › | rotor-assembly | 1× | 6 | 19 | assembly |
| 3.1.3 | Encoder | encoder | 1× | 6 | — | part |
| 3.1.4 | Motor Housing | motor-housing | 1× | 6 | — | part |
| 3.2 | Ball Screw | ball-screw | 1× | 6 | — | part |
| 3.3 | Encoder | encoder | 1× | 6 | — | part |
| 3.4 | Ball Bearing | ball-bearing | 2× | 12 | — | part |
| 4 | Flex Feedline | lunar-lander-injector-feedline | 6× | 6 | — | part |
Used in 1 assembly
Sourcing — likely vendors
Companies that make this · indicative price $1–$200 · MOQ & lead are typical| Vendor | HQ | Specialty | MOQ | Lead time |
|---|---|---|---|---|
| 🇨🇳JLCPCB jlcpcb.com ↗ | Shenzhen, CN | PCB fabrication | 100 pcs | 2–4 wks |
| 🇨🇳PCBWay pcbway.com ↗ | Shenzhen, CN | PCB fab & assembly | 100 pcs | 2–4 wks |
| scc.com.cn ↗ | Shenzhen, CN | PCB manufacturer | 100 pcs | 2–4 wks |
| shogini.com ↗ | Mumbai, IN | PCB manufacturer | 100 pcs | 2–4 wks |
| venture.com.sg ↗ | Singapore | Electronics contract mfg | 100 pcs | 2–4 wks |