How Air-Powered Cars Will Work - Air-powered cars have one huge advantage -- very low emissions! Learn how they will work!
How Bearings Work - Bearings are the invisible heroes inside many mechanical devices. Learn about all different kinds of bearings, including 5-foot ball bearings that keep buildings on solid footing!
How Camshafts Work - The camshaft has a huge effect on engine performance. Learn why camshafts are so important and how a new one can radically change an engine's behavior.
How Car Engines Work - The car engine is one of the most amazing machines we use in our day-to-day activities. Learn how the four-stroke internal combustion engine works!
How Chain Saws Work - At its core, a chain saw is a two-stroke engine. See how a chain saw works and learn about clutches, magnetos and carbs!
How Champ Cars Work - Champ Cars have carbon fiber bodies, 900-hp engines and top speeds of over 230 mph! Go behind the scenes to learn about the car, the team and the driver!
How Diesel Engines Work - Diesel engines are more efficient and cheaper to run than gasoline engines. Learn what makes diesel engines different!
How Diesel Locomotives Work - All aboard! Giant machines like these are just full of technological treats! Explore a hybrid-diesel locomotive -- from engine to engineer controls!
How Diesel Two-Stroke Engines Work - Take diesel-engine technology, throw in a two-stroke cycle and you've got the basis for the huge engines found in trains and big ships. Learn about the diesel two-stroke engine!
How Electric Cars Work - Electric vehicles, especially EVs powered by fuel cells, will replace gasoline-powered cars over the next decade or two. Find out how today's electric cars work!
How Electric Motors Work - There are motors all over the place! In your car, your refrigerator, washing machine, computer... Find out everything you need to know about electric motors!
How Fuel Cells Work - Fuel cells have been all over the news lately as they come closer to reality in automobiles and homes. Learn how fuel cells work and how efficient they really are!
How Fusion Propulsion Will Work - Fusion propulsion will make make it possible to travel incredible distances. See how it will work!
How Gas Turbine Engines Work - Ever wonder what's happening inside that huge jet engine as you're cruising along at 30,000 feet? Find out how gas turbine engines 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!
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!
How Horsepower Works - There are horsepower ratings on everything from cars to lawn mowers to chain saws. Find out exactly what horsepower is and how it affects performance.
How Hybrid Cars Work - Hybrid cars offer great mileage and lower emissions. Learn the secrets behind these amazing vehicles and examine two real-world examples!
How NASCAR Race Cars Work - Almost every detail of a NASCAR race car is handmade. Get a behind-the-scenes look (with lots of photos and videos) at how these amazing machines come together.
How Rocket Engines Work - The hardest part of space exploration is getting a spaceship off the ground. Explore the basics of propulsion and learn about both solid-fuel and liquid-fuel rocket engines.
How Rotary Engines Work - A rotary engine is an internal combustion engine, but it's not like the one in most cars. Learn about the rotary engine and how it compares performance-wise to a piston engine.
How Steam Engines Work - Steam engines powered all early locomotives, steam boats and factories -- they fueled the Industrial Revolution. Learn how the steam engine produces power!
How Stirling Engines Work - The Stirling engine has been around for a while, but it may have some new, high-tech uses. Learn about this unusual heat engine!
How Turbochargers Work - Turbochargers appear on all sorts of high-performance engines because they significantly improve the power-to-weight ratio. Find out how turbos work!
How Two-stroke Engines Work - Discover the differences between the engine in your car and the engine in your chain saw!