The Hawker Siddeley Trident 3B was a stretched version of the Trident, and had a small booster-engine making it a four-engined Trijet. : r/WeirdWings
Engine Failure of an Aircraft—System Modeler Model
G-AWZK Trident at Manchester | Immaculate restoration at Man… | Flickr
Trident 3B - never operated under this livery | British aircraft, British airline, British european airways
A Hawker Siddeley Trident cockpit experience – Jet Age Museum style
Modern Airliners - Hawker Siddeley Trident DH121
Hawker Siddeley HS-121 Trident 3B - BEA - British European Airways | Aviation Photo #1530913 | Airliners.net
Max Kingsley-Jones on X: "@The_West_Guy Oh yes: 3 x RB163 Spey, 1 x RB162 booster (plus 1 x Garrett AiResearch GTCP85 APU - above no.2 intake) #avgeeks https://t.co/i79aOdJ54M" / X
G-AWZK Hawker Siddeley HS-121 Trident 3B British European … | Flickr
The Hawker Siddeley Trident and its Variants - Airport Spotting
The Hawker Siddeley Trident and its Variants - Airport Spotting
Hawker Siddeley Trident 3B and its fourth "booster" engine - PPRuNe Forums
Hawker Siddeley HS.121 Trident
Hawker siddeley trident immagini e fotografie stock ad alta risoluzione - Alamy