(redirected from Ramjets)
Also found in: Thesaurus, Encyclopedia.
Related to Ramjets: scramjets


A jet engine that propels aircraft by igniting fuel mixed with air taken and compressed by the forward motion of the aircraft.


(ˈræmˌdʒɛt) or

ramjet engine

a. a type of jet engine in which fuel is burned in a duct using air compressed by the forward speed of the aircraft
b. an aircraft powered by such an engine



a jet engine operated by fuel injected into a stream of air compressed by the aircraft's forward speed.


A jet-propulsion engine containing neither compressor nor turbine which depends for its operation on the air compression accomplished by the forward motion of the engine. See also pulsejet.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.ramjet - a simple type of jet engine; must be launched at high speed
jet engine - a gas turbine produces a stream of hot gas that propels a jet plane by reaction propulsion


[ˈræmdʒet] Nestatorreactor m

ramjet (engine)

nStaustrahltriebwerk nt, → Ramjet nt
References in periodicals archive ?
The turbojet engines functioned as ordinary jets at lower speeds, but transitioned to ramjets at speeds above 2,000 mph.
Though most ramjets are liquid fuel, which generally burns more efficiently, solid fuel can be packed more densely, meaning a solid-fuel rocket can typically fly farther, Walker said.
ALNMOUTH and Lesbury Ramjets were crowned Lingarde Under-19 T20 Cup champions after a 14-run victory over Ashington Acorns.
The ultra-rapid air vehicle has been dubbed the "son of Concorde", and the plans show the plane would be propelled vertically by rocket engines to hypersonic speeds and then hydrogen-powered wing- mounted ramjets would take over and propel the aircraft to its destination.
Then the rocket motor will cease and a pair of wing-mounted ramjets will help it reach Mach 4.
Used widely in the defence industry to provide propulsion for Unmanned Aerial Vehicles (UAV) or drones, air-breathing solid fuel ramjets operate in a similar way to conventional ramjets, but are simpler.
Plans show the plane would be propelled vertically by rocket engines to supersonic speeds and then hydrogenpowered wing mounted ramjets would take over and propel the aircraft.
Guidance range would be too limited, so a series of configurations followed with smaller ramjets in various positions.
Subsonic ramjets transition to supersonic scramjets around Mach 5--five times the speed of sound.
High speed, air-breathing engines are known as ramjets or scramjets because they ram oxygen into the front of the engines.
Scramjets, also known as supersonic combustion ramjets, can theoretically halve payload weights by carrying only fuel - such as liquid hydrogen - rather than both the fuel and oxygen carried by traditional rockets.
Ramjets were the simplest engines in use, amounting to carefully shaped ducts with fuel injectors.