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Discussion History

Grid Fin System

Assembly

Four cast-and-machined titanium lattice fins at the top of the booster that steer it through hypersonic and supersonic descent, the booster’s only aerodynamic control between the entry and landing burns. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.

Grid Fin System parts and their functions

2 top-level parts · 975 parts in total · full bill of materials below
Grid Fin System parts diagram: 1 titanium grid fin, 2 fin hydraulic power unit. 975 parts in 2 assemblies.
Grid Fin System parts diagram. Numbers match the table below; each box is one top-level part or assembly with what it contains.
#PartQtyWhat it does
1 Titanium Grid Fin 5 parts 4× Single-piece cast titanium lattice, roughly 1.2 m × 2 m, that flies through its own re-entry plasma unprotected and is reused without refurbishment, earlier aluminium fins ablated and were retired.
2 Fin Hydraulic Power Unit 5 parts 1× Closed-loop hydraulic power

3D model

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Build & assembly graph

expand / collapse · shared sub-assemblies converge · links to related products · est. labour
product / assembly shared across products atomic part related product

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Bill of materials for Grid Fin System

2 top-level lines · 12 rows shown · 975 parts total · indented to 3 levels
# Item / sub-assembly Part no. Qty/assy Ext. qty Parts Type
1 Titanium Grid Fin 5 parts reusable-launch-vehicle-grid-fin 4× 4 17 assembly
1.1 Grid Fin Lattice Body reusable-launch-vehicle-fin-lattice 1× 4 · part
1.2 Grid Fin Actuator reusable-launch-vehicle-fin-actuator 1× 4 · part
1.3 Grid Fin Shaft reusable-launch-vehicle-fin-shaft 1× 4 · part
1.4 Ball Bearing ball-bearing 2× 8 · part
1.5 Fastener Set fastener-set 12× 48 · part
2 Fin Hydraulic Power Unit 5 parts reusable-launch-vehicle-fin-hydraulic-unit 1× 1 907 assembly
2.1 Hydraulic Pump reusable-launch-vehicle-hydraulic-pump 1× 1 · part
2.2 Hydraulic Reservoir reusable-launch-vehicle-hydraulic-reservoir 1× 1 · part
2.3 Hydraulic Accumulator reusable-launch-vehicle-hydraulic-accumulator 1× 1 · part
2.4 Duct Flange Joint orbital-launch-vehicle-flange-joint 900× 900 · part
2.5 Pressure Sensor pressure-sensor 4× 4 · part

Where the grid fin system is used

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

Used in 1 assembly

Reusable Booster Stage

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
VendorHQSpecialtyMOQLead time
🇨🇳Foxconn
foxconn.com ↗ 		Shenzhen, CN Electronics contract mfg 1,000 pcs 6–10 wks
🇸🇬Flex (Singapore)
flex.com ↗ 		Singapore Electronics contract mfg 1,000 pcs 6–10 wks
🇮🇳Dixon Technologies
dixoninfo.com ↗ 		Noida, IN Electronics contract mfg 1,000 pcs 6–10 wks
🇨🇳BYD Electronics
bydelectronic.com ↗ 		Shenzhen, CN Electronics contract mfg 1,000 pcs 6–10 wks
🇸🇬Venture Corp
venture.com.sg ↗ 		Singapore Electronics contract mfg 1,000 pcs 6–10 wks