I Built a 15-Foot K'NEX Roller Coaster (It's Huge)

🛠 Shop 3D Printed K'NEX Models & Train Systems: https://tkmshop.store 🎢 Share & Discover K'NEX Builds: https://knexbuildhub.com I built Red Force at PortAventura — Europe’s tallest and fastest roller coaster — as a 15-foot tall fully working K’NEX roller coaster. This build took over 6 weeks to complete, using thousands of K’NEX pieces, custom 3D-printed train components, and a magnetic eddy-current brake system inspired by the real ride. From structural engineering challenges to launch alignment and brake tuning, this is my most ambitious vertical accelerator coaster yet. In this video you’ll see: • The full 15ft tower construction • Magnetic braking using aluminium fins • Launch and brake run precision alignment • Custom 3D-printed Red Force train • The final test runs This project pushes K’NEX further than it was ever designed to go. If you enjoy realistic roller coaster recreations, large scale builds, and 3D printing engineering projects — make sure to subscribe. 🎢 Follow the full journey & behind the scenes: 👾 Join the Discord:   / discord   📺 Gaming Channel:    / @theknexmakergames   🎵 TikTok:   / theknexmaker   📸 Instagram:   / knexmaker   📘 Facebook:   / theknexmaker   https://www.paypal.com/donate/?hosted...