Powerful engines By ClassBrain Staff Jul 26, 2006, 10:06am

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	How fire engines work - This page tells you how the fire truck, the pump, the hose and the ladder work. Grab a seat and find out why fire engines are the ultimate mobile toolbox. Source: HowStuffWorks.com
	How airplanes work – To learn about aerodynamic forces, the parts of an airplane, how the direction is controlled, how the airplane sensors work and interesting things about the wind, prepare for liftoff! Source: HowStuffWorks.com

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