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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.

Descent Propulsion Module parts and their functions

4 top-level parts · 466 parts in total · full bill of materials below
Descent Propulsion Module parts diagram: 1 throttleable main engine, 2 engine control unit, 3 gimbal actuator, 4 flex feedline. 466 parts in 4 top-level items.
Descent Propulsion Module parts diagram. Numbers match the table below; each box is one top-level part or assembly with what it contains.
#PartQtyWhat it does
1 Throttleable Main Engine 5 parts 3× Throttleable engines (center + 2)
2 Engine Control Unit 5 parts 1× Engine control unit
3 Gimbal Actuator 4 parts 6× Thrust vector actuators
4 Flex Feedline 6× Flex feedlines

3D model

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Build & assembly graph

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Bill of materials for Descent Propulsion Module

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

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Where the descent propulsion module is used

1 product across 1 domain contain it, directly or inside a sub-assembly

Used in 1 assembly

Lunar Lander

Sourcing: possible vendors

Browse the supplier directory → 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 $1–$200. How estimates work
VendorHQSpecialtyMOQLead 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
🇨🇳Shennan Circuits
scc.com.cn ↗ 		Shenzhen, CN PCB manufacturer 100 pcs 2–4 wks
🇮🇳Shogini Technoarts
shogini.com ↗ 		Mumbai, IN PCB manufacturer 100 pcs 2–4 wks
🇸🇬Venture Corp
venture.com.sg ↗ 		Singapore Electronics contract mfg 100 pcs 2–4 wks