Rolls-Royce Pegasus turbofan

E98227

turbofan engine vectored-thrust jet engine

The Rolls-Royce Pegasus turbofan is a unique vectored-thrust jet engine that enables vertical and short takeoff and landing (V/STOL) capability in aircraft such as the Harrier family.

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All labels observed (6)

Label	Occurrences
Rolls-Royce Pegasus	6
Rolls-Royce Pegasus turbofan engine	2
Bristol Pegasus (turbofan)	1
Pegasus turbofan engine	1
Pegasus vectored-thrust turbofan	1
Rolls-Royce Pegasus turbofan canonical	1

How this entity was disambiguated

This entity first appeared as the object of triple T822159 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: Rolls-Royce Pegasus turbofan
Context triple: [AV-8B Harrier II, engine, Rolls-Royce Pegasus turbofan]

A. Rolls-Royce RB211
The Rolls-Royce RB211 is a high-bypass turbofan jet engine that was pioneering in its use of advanced materials and technology and became a cornerstone powerplant for wide-body airliners.
B. Rolls-Royce Griffon
The Rolls-Royce Griffon is a powerful British liquid-cooled V12 aero engine developed during World War II, best known for powering later, high-performance variants of the Supermarine Spitfire and other Royal Air Force aircraft.
C. Pratt & Whitney F117-PW-100
The Pratt & Whitney F117-PW-100 is a high-bypass turbofan jet engine used to power the Boeing C-17 Globemaster III military transport aircraft.
D. Snecma M53
The Snecma M53 is a French afterburning turbofan jet engine developed by Snecma, best known for powering Dassault’s Mirage 2000 fighter aircraft.
E. Pratt & Whitney JT9D
The Pratt & Whitney JT9D is a high-bypass turbofan jet engine that powered early wide-body airliners and was notably used on the original Boeing 747 series.
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: Rolls-Royce Pegasus turbofan
Target entity description: The Rolls-Royce Pegasus turbofan is a unique vectored-thrust jet engine that enables vertical and short takeoff and landing (V/STOL) capability in aircraft such as the Harrier family.

A. Rolls-Royce RB211
The Rolls-Royce RB211 is a high-bypass turbofan jet engine that was pioneering in its use of advanced materials and technology and became a cornerstone powerplant for wide-body airliners.
B. Rolls-Royce Griffon
The Rolls-Royce Griffon is a powerful British liquid-cooled V12 aero engine developed during World War II, best known for powering later, high-performance variants of the Supermarine Spitfire and other Royal Air Force aircraft.
C. Pratt & Whitney F117-PW-100
The Pratt & Whitney F117-PW-100 is a high-bypass turbofan jet engine used to power the Boeing C-17 Globemaster III military transport aircraft.
D. Snecma M53
The Snecma M53 is a French afterburning turbofan jet engine developed by Snecma, best known for powering Dassault’s Mirage 2000 fighter aircraft.
E. Pratt & Whitney JT9D
The Pratt & Whitney JT9D is a high-bypass turbofan jet engine that powered early wide-body airliners and was notably used on the original Boeing 747 series.
F. None of above. chosen

Statements (48)

Predicate	Object
instanceOf	turbofan engine ⓘ vectored-thrust jet engine ⓘ
acquiredBy	Rolls-Royce ⓘ linked to: Rolls-Royce Limited
alsoKnownAs	Bristol Siddeley Pegasus ⓘ Rolls-Royce RB.168 ⓘ
application	V/STOL fighter aircraft ⓘ
bypassRatio	low-bypass ⓘ
category	military aircraft engine ⓘ
configuration	two-spool turbofan ⓘ
controlSystem	hydro-mechanical control ⓘ
countryOfOrigin	United Kingdom ⓘ
designedBy	Bristol Siddeley ⓘ
developedFrom	Bristol Orpheus ⓘ
developmentStarted	1950s ⓘ
enablesCapability	short takeoff and landing ⓘ vertical takeoff and landing ⓘ
enteredService	1960s ⓘ
firstRun	1959 ⓘ
fuelType	aviation kerosene ⓘ
hasFeature	annular combustor ⓘ axial-flow compressor ⓘ front fan driven by low-pressure turbine ⓘ high-pressure and low-pressure turbines ⓘ mechanically linked nozzle actuation system ⓘ
hasNozzles	two cold (fan) nozzles ⓘ two hot (core) nozzles ⓘ
manufacturer	Rolls-Royce ⓘ linked to: Rolls-Royce Limited
notableConflictUse	Falklands War ⓘ Gulf War ⓘ
notableFor	enabling operational V/STOL combat aircraft ⓘ
notableVariant	Pegasus 11 ⓘ Pegasus 11-61 ⓘ linked to: Pegasus 11
nozzleDeflectionRange	approximately 0 to 98 degrees ⓘ
operator	Indian Navy ⓘ Italian Navy ⓘ Royal Air Force ⓘ Royal Navy ⓘ United States Marine Corps ⓘ
primaryUse	Harrier family of aircraft ⓘ linked to: Hawker Siddeley Harrier
role	military turbofan engine ⓘ
thrustClass	around 20,000 to 24,000 lbf dry ⓘ
thrustVectoring	four swivelling exhaust nozzles ⓘ
usedFor	expeditionary air operations ⓘ shipborne operations ⓘ
usedInAircraft	BAE Systems Harrier II ⓘ linked to: AV-8B Harrier II British Aerospace Sea Harrier ⓘ linked to: Sea Harrier fighter aircraft Hawker Siddeley Harrier ⓘ McDonnell Douglas AV-8B Harrier II ⓘ linked to: AV-8B Harrier II

How these facts were elicited

Referenced by (12)

Full triples — surface form annotated when it differs from this entity's canonical label.

AV-8B Harrier II → engine → Rolls-Royce Pegasus turbofan ⓘ

Sea Harrier → poweredBy → Rolls-Royce Pegasus turbofan engine ⓘ

subject linked to: Sea Harrier fighter aircraft