During the second world war, fighter planes were the most common for air invasions. However, these planes were usually easy to take down and were virtually guaranteed to crash at some point. Americans used Tomahawk fighting planes, while the British used the Curtiss P-40 Kitt...
It's not just how many cylinders a car has that's important but how much power each one can make as it pushes out its piston. That depends on the size of the cylinder, which, in turn, depends on two key measurements: the diameter of the cylinder (called its bore) and how far the...
For the last 150 years or so, virtually every car has run on a liquid we rather confusingly call gas. But in the next 150 years, many people think cars will run on a real gas: hydrogen. In theory, running cars off hydrogen is a great idea: it's the simplest and most common ...
Take a look at Ford's seminal Model T -- it looks more like a horse carriage minus the horses -- a very boxy design, indeed. Many of these early cars didn't need to worry about aerodynamics because they were relatively slow. However, some racing cars of the early 1900s incorporated ...
Today,theusesofaluminumareinnumerable.Perhapsitsmostimportantuseisintransportation.Aluminumisfoundintheengineofautomobiles,inthehullsofboats.Itisalsousedinmanypartsofairplanes.Infact,thehuge“airbus”planeswouldprobablyneverhavebeenproducedifaluminumdidnotexist.Bymakingvehicleslighterinweightaluminumhasgreatlyreducedtheam...
Two planes struck the towers of The World Trade Center, one crashed into the Pentagon, and another crashed in a Pennsylvania field. The attacks launched the worldwide “War on Terror,” a global military campaign still in effect today. As part of this effort, President George W. Bush ...
Nearly 3,000 people died in the attacks and more than 6,000 were injured—there were no survivors on any of the hijacked planes. Two planes struck the towers of The World Trade Center, one crashed into the Pentagon, and another crashed in a Pennsylvania field. The attacks launched the ...