ram·​jet | \ ˈram-ˌjet How to pronounce ramjet (audio) \

Definition of ramjet

: a jet engine that consists essentially of a hollow tube without mechanical components and depends on the aircraft's speed of flight to compress the air which is supplied to a burner from which hot gases are discharged rearward

Examples of ramjet in a Sentence

Recent Examples on the Web

These are propelled by underwater ramjets rather than propellers and travel inside a bubble of gas to reduce friction, achieving speeds in excess of 200 mph. David Hambling, Popular Mechanics, "The Truth Behind Russia’s 'Apocalypse Torpedo'," 18 Jan. 2019 In addition to the ERCA upgrades, the Army could end up fielding the new Nammo ramjet artillery shell. Kyle Mizokami, Popular Mechanics, "The Army’s New Howitzer Barrel is Ridiculously Long," 17 Oct. 2018 The Meteor missile that The Economist mentions is actually operational, while Chinese ramjet air-to-air missile development is still experiencing problems. Kyle Mizokami, Popular Mechanics, "Will China’s Airpower Soon Rival the West?," 16 Feb. 2018 But hypersonic vehicles generally reach their tremendous speeds using supersonic combustion ramjet engines, or scramjets, whichs compress and combust air flowing in at supersonic speeds. Mike Wall, Space.com, "US Air Force Zooms Ahead on 2 New Hypersonic Weapons Plans," 20 Aug. 2018 For this plane, the two engines would share the same air inlets, and the jet engines would operate up to Mach 2 or 3 before the inlets seal off the jet engine and divert air into the ramjets, which can handle faster airflow. Eric Adams, WIRED, "Boeing’s Proposed Hypersonic Plane Is Really, Really Fast," 28 June 2018 In the Saudi-Ukrainian project, the ramjet will accelerate the vehicle between Mach 4 and 6. Anatoly Zak, Popular Mechanics, "Ukraine Is Building a Spaceplane for...Saudi Arabia?," 14 Mar. 2018 The ramjet/scramjet would then carry an aircraft to speeds over Mach 5. Jay Bennett, Popular Mechanics, ""Son of Blackbird": Boeing Reveals Hypersonic Concept That Could Replace SR-71," 12 Jan. 2018 In order to start up, though, ramjets typically need a speed boost from something else—usually a booster rocket. Sean Gallagher, Ars Technica, "Best bad idea ever? Why Putin’s nuclear-powered missile is possible… and awful," 22 Mar. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'ramjet.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of ramjet

1942, in the meaning defined above

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Last Updated

18 Apr 2019

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Time Traveler for ramjet

The first known use of ramjet was in 1942

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Rhyming Dictionary: Words that rhyme with ramjet

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to affect and impair by alcohol or a drug

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