What does propjet mean?
A propjet is an aircraft or propulsion system that combines a power-driven propeller with jet propulsion. The expression is particularly associated with the Soviet Tu-95, a heavy bomber whose four NK-12 turboprop engines drove pairs of contra-rotating propellers. Such an arrangement combines the efficient use of a propeller at lower speeds with the potential for jet thrust, although the term is applied somewhat differently according to the aircraft and propulsion system being discussed. In aviation writing, “propjet” is less common than the more precise “turboprop,” and it can sometimes be used informally for large turboprop aircraft. Outside technical, military, and historical contexts, the word is rare, but it remains useful when discussing unusual propulsion arrangements and the technology of the distinctive Tu-95 bomber.
nounA propjet is an aircraft or propulsion system that combines a power-driven propeller with jet propulsion. The term is chiefly associated with the Soviet-designed Tu-95 bomber, whose powerful turboprop engines drove contra-rotating propellers.
- An aircraft or propulsion system combining a power-driven propeller with jet propulsion.
"The Tu-95 is a four-engine propjet capable of carrying heavy loads at high speed."
"The aircraft was designed as a propjet, with four engines driving pairs of contra-rotating propellers."
"Military planners compared the propjet's speed with that of conventional propeller-driven bombers."
The plural is formed by adding -s.
"Several propjets have combined propeller thrust with jet-assisted performance."
The Tu-95's quartet of enormous contra-rotating propellers helped it become one of the world's most distinctive combat aircraft.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does propjet come from?
The word was formed by combining “prop,” short for propeller, with “jet.” Both elements are English words: “propeller” comes from Latin propellere, meaning “to drive forward,” while “jet” comes through French from Latin iactare, “to throw.” The compound emerged as a descriptive term for aircraft and propulsion systems combining propeller and jet principles.
How propjet is actually used
This is a relatively uncommon technical and historical term. It is especially associated with the Tu-95 and is sometimes used loosely for propeller-driven aircraft with turboprop propulsion.
Easily confused with propjet
A turboprop uses a turbine engine solely to drive its propeller, whereas a propjet more broadly denotes a combination of propeller and jet propulsion.
A turbojet produces thrust entirely through exhaust gases, while a propjet also uses a power-driven propeller.