Brick & Bolt on Instagram: "Parsik Tunnel Maharashtra | 1916 Rail Engineering Marvel That Still Carries Trains Today Hidden within Maharashtra’s busy railway network is a century-old engineering achievement that still performs its duty quietly every day — the Parsik Tunnel. Completed in 1916, this tunnel was carved through the Parsik Hill range to strengthen the vital rail connection between Mumbai and Thane, at a time when modern machinery and advanced geological studies were nonexistent. Stret

Engineering | AI | Tech on Instagram: "It looks like a video game. The physics inside that tube are anything but. 🧠 You are watching Dario Costa set a Guinness World Record by flying a race plane through two narrow highway tunnels in Turkey. Everyone focuses on the concrete walls—but the real threat was invisible. The “Piston Effect” Engineering: The Compression: As the aircraft enters the tunnel, it forces air forward like a piston. With nowhere to escape, the trapped air creates unstable turb