Compact launcher for accurate indoor projectile motion labs Make projectile motion precise, repeatable, and classroom-friendly. Arbor Scientific’s Mini Projectile Launcher is a compact, accurate launcher designed for indoor physics labs, projecting 16 mm steel balls over controlled ranges ideal for benchtop or bench-to-floor experiments. With three repeatable launch speeds, adjustable launch angles from 90° to –45°, and an exclusive magnetic metal cup for improved accuracy, it offers a low-cost way for every student group to investigate projectile motion with confidence. Why Teachers Love the Mini Projectile Launcher Precise and repeatable: Three spring tensions deliver consistent launch speeds with no measurable spring fatigue. Exclusive accuracy upgrade: The magnetic metal cup keeps the ball perfectly seated for better launch consistency. Compact & classroom-ready: Ideal ranges for indoor use—on the bench or bench-to-floor—without special space requirements. Smooth, controlled launches: Cable release minimizes disturbance at launch; clamp-ready or free-standing use.