ramjet

noun
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.

See More

First Known Use of ramjet

1942, in the meaning defined above

Keep scrolling for more

Learn More about ramjet

Statistics for ramjet

Last Updated

18 Apr 2019

Look-up Popularity

Time Traveler for ramjet

The first known use of ramjet was in 1942

See more words from the same year

More from Merriam-Webster on ramjet

Rhyming Dictionary: Words that rhyme with ramjet

Britannica.com: Encyclopedia article about ramjet

Comments on ramjet

What made you want to look up ramjet? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

to affect and impair by alcohol or a drug

Get Word of the Day daily email!

Test Your Vocabulary

Words from Greek and Latin Quiz

  • roman forum
  • Which of the following months comes from a Latin word for “ten”?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!