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AERODYNAMIC CONTROL
Falcon 9 Grid Fins
Mass
70 kg
Dimensions
1.5 m x 1.2 m per fin (4 fins total)
Material
Cast titanium alloy
First Use
Dec 22, 2015
Usage Statistics
300
Successful Uses
99%
Success Rate
How It Works
Hypersonic and subsonic aerodynamic steering via lattice fin surfaces that create differential drag and lift forces for roll, pitch, and yaw control during atmospheric descent.
Key Specifications
Sweep angle60u00b0
DeploymentPneumatic hinge
Max Mach5+
Reuses per set20+
Compatible Vehicles
Falcon 9 Block 5Falcon Heavy
Details
Titanium grid fins mounted on the Falcon 9 first stage that provide aerodynamic steering during descent through the atmosphere. Each fin is a single-piece casting of titanium that can withstand reentry heating without a thermal protection system. The four grid fins deploy after stage separation and guide the booster to a precision landing.
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