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2. Union Pacific Big Boy - Wikipedia

   en.wikipedia.org/wiki/Union_Pacific_Big_Boy

   Cost to build US$ 265,000 in 1941, equivalent to $5,489,457 in 2023. The Union Pacific Big Boy is a type of simple articulated 4-8-8-4 steam locomotive manufactured by the American Locomotive Company (ALCO) between 1941 and 1944 and operated by the Union Pacific Railroad in revenue service until 1962. The 25 Big Boy locomotives were built to ...

3. Union Pacific 4014 - Wikipedia

   en.wikipedia.org/wiki/Union_Pacific_4014

   Union Pacific 4014 is a steam locomotive owned and operated by the Union Pacific (UP) as part of its heritage fleet. It is a four-cylinder simple articulated 4-8-8-4 "Big Boy" type built in 1941 by the American Locomotive Company (ALCO) at its Schenectady Locomotive Works. It was assigned to haul heavy freight trains in the Wasatch mountain range.

4. Piezoelectric motor - Wikipedia

   en.wikipedia.org/wiki/Piezoelectric_motor

   A piezoelectric motor or piezo motor is a type of electric motor based on the change in shape of a piezoelectric material when an electric field is applied, as a consequence of the converse piezoelectric effect. An electrical circuit makes acoustic or ultrasonic vibrations in the piezoelectric material, most often lead zirconate titanate and ...

5. Experimental: Create your own homopolar motor with these easy ...

   www.aol.com/article/news/2017/11/14/experimental...

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6. Motor Boys - Wikipedia

   en.wikipedia.org/wiki/Motor_Boys

   The Motor Boys were the heroes of a popular series of adventure books for boys at the turn of the 20th century issued by the Stratemeyer Syndicate under the pseudonym of Clarence Young. This series was published by Cupples & Leon and was issued with dustjackets and glossy frontispiece. Howard Garis (author of the Uncle Wiggily stories) wrote ...

7. Flat-four engine - Wikipedia

   en.wikipedia.org/wiki/Flat-four_engine

   A flat-four engine, also known as a horizontally opposed-four engine or boxer engine, [ 1] is a four-cylinder piston engine with two banks of cylinders lying on opposite sides of a common crankshaft. The most common type of flat-four engine is the boxer-four engine, each pair of opposed pistons moves inwards and outwards at the same time.