A more detailed model of a Gridfin similar to the ones used on the Falcon 9 and Falcon Heavy rockets Again made for aerodynamics simulations but modified to be printed on it's own, it can be scaled to fit any printer and made into a nice desk model or as a part for a larger rocket scale model - it includes all aerodynamically relevant details including the waved/pointy profiles on the inside of the gridfin to improve transsonic behaviour gridfins are essentially clusters of small fin or wing segments that are alined in a plane vertical to it's own plane or planes since they are themselves aligned in different directions - it has a few advantages in high speed control and stability applications and this one is based on the ones used by Space-X to guide their Falcon 9 first stages down to landing