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Science | Transportation | Engines & Equipment

Engines and construction equipment are all complex machines. How do some of these engines work, and how do they help us construct buildings and structures?

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How Oil Tankers Work

Oil tankers carry massive amounts of oil, gasoline and other petroleum products between ports. However, crewmembers must guard against explosions, pirates and more.


 Where should I sit to get the best ride on a roller coaster?

Do certain cars in a roller coaster train give a better ride? Why? Which is the best car? See more »

How Caterpillar Backhoe Loaders Work

 How Caterpillar Backhoe Loaders Work

You see backhoe-loaders on nearly every construction site around town. Learn how these amazing machines work and what they are able to do. See more »

How Gear Ratios Work

 How Gear Ratios Work

You see gears in just about anything that has spinning parts -- car engines, transmissions, VCRs... Learn what these gears are doing and get to the bottom of the "gear ratio" concept! See more »

How Gears Work

How Gears Work

Gears are a fundamental part of just about any mechanical object -- if it has a motor, engine or spring, it probably has gears! Learn dozens of fascinating facts about gears! See more »

 How do they get the balls in ball bearings so perfectly round and smooth?

How do manufacturers get the balls in ball bearings so perfectly round and smooth? See more »

What is a punkin chunkin?

 What is a punkin chunkin?

A punkin chunkin is explained in this article. Learn about a punkin chunkin. See more »

How Maglev Trains Work

 How Maglev Trains Work

Magnetic levitation trains are becoming a popular transportation topic all around the globe. Learn about electromagnetic suspension, the most popular type of maglev train. See more »

How Bearings Work

 How Bearings Work

Bearings are the invisible heroes inside many mechanical devices. Learn about all different kinds of bearings. See more »

How Submarines Work

 How Submarines Work

Submarines are essentially containers that hold people and air. Learn how these remarkable vessels dive, surface and maneuver through the ocean. See more »

 How do torpedo engines work under water?

Since a torpedo cannot have an air-breathing engine like a boat, how is it propelled through the water? See more »