{ "item_title" : "How a Locomotive Pulls a Train", "item_author" : [" Rowan Rivet "], "item_description" : "How can one engine pull a train more than a mile long?The locomotive is the engine at the front. It turns fire, fuel or electricity into enough push to move a whole line of heavy cars. This book opens one up, part by part, and follows the power all the way from the engine to the wheels.Big cutaway diagrams show: how fire, water and steam push pistons and rods to turn the giant wheels of a steam enginehow a diesel locomotive makes its own electricity and sends it to a motor on every axlehow cone-shaped wheels steer the train by themselves, with no steering wheel at allhow air brakes stop a long train, and how sand helps the wheels grip a slippery railhow signals and switches keep trains apart and guide them onto the right trackTravel from horse-drawn wagons and the little Rocket of 1829 to electric locomotives, a Japanese bullet train with a nose shaped like a kingfisher's beak, and maglev trains that float on magnets. Then meet three famous machines: the giant Big Boy steam engine, the longest freight train on record and the first bullet train.Inside you'll find: nearly 30 illustrations, with numbered parts that point to the pages that explain themFact Bolts packed with real numbersa hands-on activity: make a wheelset from two paper cups and watch it steer itselfa parts quiz, big questions and answers, and a glossary of 28 train wordsFor curious readers ages 7 to 10 who love trains, big machines and finding out how things work. Book 2 in the Giant Machine Cutaways series.", "item_img_path" : "https://covers2.booksamillion.com/covers/bam/9/79/816/458/9798164585945_b.jpg", "price_data" : { "retail_price" : "13.99", "online_price" : "13.99", "our_price" : "13.99", "club_price" : "13.99", "savings_pct" : "0", "savings_amt" : "0.00", "club_savings_pct" : "0", "club_savings_amt" : "0.00", "discount_pct" : "10", "store_price" : "" } }

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