ramjet

noun
ram·jet | \ˈram-ˌjet \

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

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 Why, for example, does the mothership appear to be some sort of sleek supersonic/hypersonic aircraft with what looks like ramjet engines? Kyle Mizokami, Popular Mechanics, "China Is Building a Spaceplane of Its Own," 8 Mar. 2018 The ramjet instead uses the shockwaves created by traveling at such high speeds to squeeze incoming air. Kate Baggaley /, NBC News, "These planes could jet you around the world at hypersonic speed," 31 Jan. 2018 Integrating a turbine engine and a ramjet/scramjet will come with some significant engineering hurdles to clear. Jay Bennett, Popular Mechanics, "DARPA Picks Aerojet Rocketdyne to Build Hypersonic Jet Engine," 10 Oct. 2017 To bridge the gap, Aerojet Rocketdyne will need to both increase the maximum operational speed of the turbojet and decrease the minimum operational speed of a ramjet. Jay Bennett, Popular Mechanics, "DARPA Picks Aerojet Rocketdyne to Build Hypersonic Jet Engine," 10 Oct. 2017

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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The first known use of ramjet was in 1942

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