Projectile weaving refers to weaving on a projectile loom. With projectile looms, there are no shuttles to transport the yarn around the shed but projectiles, so small bullets that grip onto the yarn.
When a projectile reaches the other end of the shed / weaving machine, it lets the yarn go and drops down to a conveyor belt that transports it back. Meanwhile, other projectiles transport the yarn from one side to the other. Thanks to the application of several projectiles (around 11 - 17), it is possible to weave very quickly.