Williams FJ44
small turbofan engine
The Williams FJ44 is a family of small, two-spool, turbofan engines produced by Williams International for the light business jet market. Until the recent boom in the very light jet market, the FJ44 was one of the smallest turbofans available for civilian applications. Although a Williams design, Rolls-Royce was brought into the project at an early stage to design, develop, and manufacture an air-cooled high-pressure (HP) turbine for the engine. The FJ44 first flew on July 12, 1988 on the Scaled Composites/Beechcraft Triumph aircraft.
The Williams FJ33 is a newer, smaller engine based on the basic FJ44 design.
Development
Production started in 1992 with the 1,900 lbf (8.5 kN) thrust FJ44-1A. The FJ44-1C is derated to 1,500 lbf (6.7 kN).
The uprated to 2,300 lbf (10 kN) FJ44-2A was introduced in 1997.
The 2,820 lbf (12.5 kN) thrust FJ44-3A was introduced in 2004.
In 2005, a new low end version, the FJ44-1AP, was introduced, with a 1,965 lbf (8.74 kN) takeoff thrust.
Released in 2007 was the new 3,600 lbf (16 kN) thrust FJ44-4.
“Williams FJ44” enters the record as small turbofan engine. Crown Archives preserves that source wording while asking what Williams, FJ44 and small can confirm, complicate or overturn.
Why this record matters
“Williams FJ44” is worth following because a concise public description often conceals a longer documentary argument. Here, Williams, FJ44 and small provides the most credible route into that argument.
The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Jun 20, 2026. The linked authority identifier is Q910258. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1988, 1992, 1997 and 2004.
Overview language is designed for orientation and should not be treated as a substitute for the evidence cited beneath it. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.
- Subject orientation
- Search vocabulary
- Locating named sources
The closest primary source, responsible institution and strongest cited specialist reference.
Three-step research path
- Establish the record: confirm the title “Williams FJ44”, its source revision and the description used here.
- Expand the search: follow Williams FJ44 primary sources, Williams FJ44 archive and Williams research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “Williams FJ44”?
- Which cited source is closest to the event, object or claim?
- Which institution is responsible for the underlying evidence?
Search terms from this dossier
This entry incorporates text from “Williams FJ44” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.