Dog Catapult

Quick Overview

The creator successfully built and tested an automated catapult, nicknamed the "Dog Chucker 9000," designed to launch objects based on object detection (specifically targeting dogs, bananas, and apples), ultimately testing it by launching a ballistic gel dog mold filled with fake blood, which resulted in a messy but successful demonstration of the system's functionality.

Key Points: The project involved building a large, wooden, wheeled catapult (the "Dog Chucker 9000") powered by bungee cords. The system was automated using computer vision (YOLOv8s model) programmed in Python to detect specific objects like 'dog', 'banana', and 'apple' in the launch zone to trigger the firing mechanism. The creator consulted with Mark Rober via video call for physics calculations, which estimated a potential launch distance of 19.8 meters (about 65 feet). To test the system safely indoors, the creator poured a ballistic gel mixture, including a small cat skull, into a 3D-printed dog mold to simulate the dog projectile. The ballistic gel dog was successfully launched indoors and exploded upon hitting a backstop, demonstrating the detection and launch mechanism worked. The final outdoor test involved launching a watermelon, which hit a target board on the garage door, causing significant splatter. The creator ultimately decided against launching the ballistic gel dog outdoors due to safety concerns, especially given the controversy surrounding a previous YouTuber incident involving an opossum.

Context: This video documents the process of building and testing a large, motorized, computer-vision-controlled catapult, humorously dubbed the "Dog Chucker 9000." The creator initially sought input from engineering YouTuber Mark Rober regarding the physics calculations required to estimate the projectile's trajectory. The core innovation is the integration of object detection software to automatically arm and fire the catapult only when a specified target object (initially dogs, later changed to fruit and the gel dog) is present in the firing cup.