Why Old Locomotives Had Giant 'Ears' on the Front

Why did old steam locomotives have those giant metal “ears” beside the smokebox? They were called smoke deflectors, and strangely, they became especially useful as steam locomotives became more efficient. Older steam engines blasted exhaust strongly enough to throw smoke high above the cab. But as engineers improved steam efficiency and exhaust systems, the softer exhaust could allow smoke to drift back across the locomotive and block the driver’s view of railway signals. The solution was surprisingly simple: two carefully positioned metal plates that used the locomotive’s own forward motion to redirect airflow upward and lift smoke away from the cab. In this video, we explore how steam locomotive smoke deflectors worked, why simply making the chimney taller wasn’t always possible, how designs such as Wagner and Witte deflectors evolved, and why the famous Flying Scotsman eventually needed them after receiving a more efficient exhaust system. We’ll also look at why smoke deflectors were common on many European steam locomotives but much less common in the United States — and how some streamlined locomotives solved the same problem without giant “ears” at all. Sometimes the strangest-looking part of a machine exists not because something went wrong, but because something else became better. Subscribe to Small Things for more hidden engineering, forgotten design details, and surprising stories behind the machines and objects around us. #SteamLocomotive #SteamTrain #Engineering --- Timestamp: 00:00 - intro 01:08 - The Chimney Was Doing More Than Releasing Smoke 02:04 - When Engineers Made The Engine Better The Smoke Got Worse 03:20 - The Locomotive Was Pulling Its Own Smoke Back Down 04:49 - Why Not Just Make The Chimney Taller 05:49 - How Two Flat Plates Lifted The Smoke 07:00 - Flying Scotsman The Perfect Before And After Test 08:08 - Why Many American Locomotives Went Without Them 09:00 - The Same Problem Solved Without Ears --- ✨ About Small Things Small Things is created by Sarah, Maez, and Hassan — a small team who loves exploring the hidden stories behind simple things and small things. 🤖 Disclaimer: We may use AI tools to support research and production, but every video is reviewed and edited by our team. We respect copyright, original work, and YouTube’s policies. Thank you for supporting us. 🙏 If you notice any issues, please contact us at agency.scommedia@gmail.com #smallthings #simplethings