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Falcon 8X demonstrator F-WWQA at the Paris Air Show, June 18, 2019. Photo: New York-air / Wikimedia Commons, CC BY-SA 4.0. Uncropped, resized image.
The Dassault Falcon 8X is immediately recognizable by the third engine intake at the base of its tail. That feature makes an arresting silhouette, but its more useful significance lies in the aircraft’s overall design: engine performance, approach capability and the ownership obligations attached to three powerplants. A buyer should examine all three together.
Begin with the correct engine identity
The 8X uses three Pratt & Whitney Canada PW307D engines. In its May 18, 2015 certification announcement, the engine manufacturer explained that the D variant improved takeoff thrust and fuel consumption relative to the PW307A used in the Falcon 7X. Similar-looking aircraft and related engine names should therefore remain separate entries in a comparison.
Dassault’s current 8X specification lists 6,722 pounds of thrust per engine. For a purchaser, the next step is to identify each installed engine and obtain its records. The aircraft’s age, the engines’ accumulated hours and cycles, and the work already performed answer different questions. Have a qualified pre-purchase team reconcile them.
Understand the engineering argument
Dassault links the trijet configuration to engine-performance margins, short-runway capability and climb performance. Those claims describe the combined aircraft design. Engine count alone cannot establish airport access, operating cost or comparative safety for an individual flight.
The rest of the airframe deserves equal attention. Dassault’s September 2020 technical backgrounder describes redesigned wing structures, revised winglets and a modified leading-edge profile, alongside the engine improvements. Evaluating the aircraft as an integrated system is more informative than assuming its third engine explains every performance advantage.
There is also a useful counterpoint within Dassault’s own engineering work. Its March 2026 Falcon 10X backgrounder says a twin-engine arrangement proved more efficient at that aircraft’s intended high-Mach conditions. Different missions can lead the same manufacturer to different solutions. The 8X should be judged against the journeys and airports it would actually serve.
Keep approach figures attached to their conditions
The current 8X page lists an approach reference speed of 107 knots, roughly 123 mph, at typical landing weight. It also quotes a 2,220-foot unfactored landing distance at sea level, standard atmospheric conditions and typical landing weight. These are defined reference figures, not a recommendation to use a runway of that length.
Ask the operating team for an approved assessment of each important airport, including arrival and departure conditions. If a steep approach is central to the buying case, confirm the aircraft configuration, crew qualifications and operator approvals that apply. A brochure’s example route cannot replace that work.
Review three sets of engine obligations
Request a maintenance forecast for each powerplant, including upcoming inspections, life-limited components and any enrolled support program. Obtain the actual program contract and transfer terms. A description such as “on program” becomes useful only when coverage, exclusions and financial status are understood.
Keep engine forecasts alongside airframe and avionics findings. The 2020 backgrounder describes EASy III, while Dassault’s current product page lists EASy IV; an older example’s installed equipment must be checked individually. Do not assume today’s marketing specification has been retrofitted to every aircraft.
The Falcon 8X’s appeal comes from a deliberate combination of long-distance capability and airport flexibility. The buying decision becomes clearer when its distinctive three-engine layout is supported by specific performance analyses, complete records and a realistic maintenance plan. Those documents reveal more about ownership than the silhouette alone.
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