Canadair CL-227 Sentinel
type of aircraft

The CL-227 Sentinel is a remote-controlled unmanned aerial vehicle (UAV) made by Canadair.
It displays a distinctively unusual bulbous peanut shaped profile which gave it its nickname of the flying peanut. Lift is provided by a set of coaxial rotors emanating from the waist of the system. The engine air is exhausted upwards to minimize the infrared signature. The blades are made of composite materials as well as all the external skin and legs, in an attempt to reduce the radar signature. The main structure is made mostly of aluminium.
The CL-227 was designed in 1977, and the "phase one" prototype made its first flight on 25 August 1978; the larger production "phase two" vehicle first flew untethered on 14 December 1981. Following evaluation by NATO in March 1982, and was made available to NATO allied clients in the early 1980s. In the late 1990s it was replaced by an updated version, the CL-327.
Bombardier Aerospace CL-327 Guardian
The CL-327 was developed as an upgraded and advance version of the CL-227.
Begin with the source’s own compact description: “Canadair CL-227 Sentinel” is type of aircraft. The dossier treats that line as a proposition to test through Canadair, CL-227 and Sentinel, not as a finished interpretation.
Why this record matters
The phrase “type of aircraft” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.
Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Dec 10, 2025. The linked authority identifier is Q4035634. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1977, 1978, 1981 and 1982.
The absence of detail may reflect summary conventions rather than a lack of surviving documentation. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. 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 “Canadair CL-227 Sentinel”, its source revision and the description used here.
- Expand the search: follow Canadair CL-227 Sentinel primary sources, Canadair CL-227 Sentinel archive and Canadair 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 “Canadair CL-227 Sentinel”?
- Which institution is responsible for the underlying evidence?
- Which cited source is closest to the event, object or claim?
Search terms from this dossier
This entry incorporates text from “Canadair CL-227 Sentinel” 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.