Definition of pilot engine
: a locomotive going in advance of a train to make sure that the way is clear
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“Pilot engine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pilot%20engine. Accessed 26 Jun. 2022.
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Time Traveler for pilot engine
The first known use of pilot engine was in 1838
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