Tying a knot of varieties
Buses, like cars, continue to evolve, but we haven’t seen any dramatic changes in their overall design for quite some time. A brand‑new bus today looks surprisingly similar to one built at the end of the 20th century. Yet back in 1995, Volvo imagined a very different future for buses and trucks. Volvo Buses and [ ]
Poland is a major industrial nation with a long history of impressive engineering achievements. They also have many rare, experimental, or one‑off machines created by individual engineers, adventurers and self-taught enthusiasts. A well-known glider constructor Władysław Okarmus put his name in the history of Polish aviation but also made a pretty interesting car. Władysław Okarmus, [ ]
When you were a kid, you probably thought that airplanes should have parachutes. If all the engines failed, you’d just deploy a giant canopy and float safely to the ground. Later in life you learned the painful reality: no parachute big enough to land a Boeing 737 exists. And even if it did, it would [ ]
A windshield washer system is a necessity, not a luxury. It’s one of the components checked during a technical inspection. Yet you sometimes may see a strange claim: washer fluid damages paint and promotes rust. Is there any truth to it? The first automotive windscreen washer systems appeared in the interwar period. By 1936, various [ ]
Early passenger cars with internal combustion engines, built in the late 19th and early 20th centuries, were engineering marvels of their time. Today, it’s fascinating to examine their individual components up close. Their purely mechanical nature reminds us that humans themselves are more mechanical than digital. And, of course, these early cars also make us [ ]
Spiral staircases are common in both historical architecture and modern homes. You’ll find them in lighthouses, castle towers, bell towers, and even in the living rooms of contemporary houses. But do they actually have a traditional direction? Today, people usually install spiral staircases because they save floor space or simply look good. Historically, however, spiral [ ]
While waiting for a train, you may have noticed yellow rectangular devices installed between the rails. They look small and unimportant — fixed in place, easy to cover with snow, seemingly insignificant. But in reality, these devices play a crucial role in railway safety. What are they? If you watch old films, you’ll see how [ ]
A modern main battle tank can weigh 60 tonnes or more. These are extremely heavy, powerful machines. Yet in peacetime they often have to travel on public roads for training or logistical maneuvers. How do tanks avoid destroying asphalt that we all use every day? Although this article focuses on tanks, the same principles apply [ ]
A walk along the pier can make for a pleasant evening. Watching the ships is interesting even if you have no real connection to the sea. And sometimes, small details spark curiosity. For example, have you ever noticed that some smaller boats have clear spinning discs on their windscreens? What are those for? Ship windows [ ]
Bird strikes are dangerous and have caused many aviation incidents. They usually occur during the most sensitive phases of flight – take-off and landing. But birds can soar surprisingly high. At what altitude has an aircraft collided with birds? Take-off and landing are critical because the aircraft is close to the ground and has little [ ]