There are grooves in a rifle barrel, or external screw-helices on so-called Rifled slugs, which are fired from shotguns, but are externally rifled for spin stabilization?
Yea, they can.
To swim..? If you mean the fin on top of their bodies then it helps stabilize them.
Fish typically have many fins - including dorsal, pectoral, pelvic, anal, and caudal fins - to help them navigate and control their movement in water. They use their fins to stabilize themselves, steer, and propel through the water.
The purpose of the pen fins is to stabilize the pen during writing, providing better control and precision for the user.
You use fins and a nose cone on a bottle rocket because the cone reduces the drag on the rocket, and the fins help stabilize the rocket.
Bombs use fins or parachutes to stabilize.
Fins are used to stabilize a rocket, so that it does not veer off course or tumble. However, most larger rockets do not use fins because of the atmospheric drag they create.
They use their poisonous fins
The fins on early rockets were used to control the direction of flight. Fins act to stabilize the vehicle, too. Most modern rockets have motors mounted on gimbals, so that the trajectory of the rocket can be controlled by changing the direction of thrust. That's why fins are absent on contemporary rockets. Note that they are still present on the small, hobby vehicles because they improve performance.
Pectoral fins are used for steering and maintaining balance, while pelvic fins help stabilize the fish's body and assist in maneuvering. Both fins also play a role in braking and hovering in water.
Rockets need fins to help stabilize and control their flight trajectory. Fins help provide directional stability by creating aerodynamic forces that keep the rocket pointing in the right direction. This is important for ensuring that the rocket can accurately reach its intended target.
The structure that supports fins in aquatic animals is made up of bony rays or cartilage. Fins are extensions of the body that help animals navigate, stabilize, and move through water efficiently. They vary in size and shape depending on the species and their specific needs for swimming.