Sikorsky S-33 Messenger
type of aircraft
The Sikorsky S-33 Messenger was an American two-seat sesquiplane designed and built by the Sikorsky Manufacturing Corporation in 1925.
The first of two examples built participated in the Sixth Pulitzer Trophy Race at Mitchel Field, Long Island, New York on October 12, 1925 and was piloted by Al Krapish, an employee of Sikorsky.
The first aircraft is reported to have been powered by a Wright Gale of 60 hp (45 kW) and the second by a Lawrance L-3 of 60 hp (45 kW). These were essentially the same engine type, post- and pre- acquisition of the Lawrance Aero Engine Company by the Wright Aeronautical Corporation, respectively. Some sources assert that the aircraft was powered by an Anzani engine, but this is most likely to be a mis-identification.
Begin with the source’s own compact description: “Sikorsky S-33 Messenger” is type of aircraft. The dossier treats that line as a proposition to test through Sikorsky, S-33 and Messenger, 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.
Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Nov 9, 2025. The linked authority identifier is Q28401397. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1925.
Overview language is designed for orientation and should not be treated as a substitute for the evidence cited beneath it. 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 “Sikorsky S-33 Messenger”, its source revision and the description used here.
- Expand the search: follow Sikorsky S-33 Messenger primary sources, Sikorsky S-33 Messenger archive and Sikorsky 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 “Sikorsky S-33 Messenger”?
- 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 “Sikorsky S-33 Messenger” 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.