CACrown ArchivesThe cinema collection
Menu
Research dossier · General Reference

Praga E-45

biplane fighter prototype

Cross-disciplinary reference desk with index cards, atlas, dictionary and catalogue
General referenceInterpretive dossier study · Crown Archives visual atlas
Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionSep 5, 2026
Entity authorityQ2302055
Source-derived summary

The Praga E-45 was a single-engined, single-seat biplane fighter built in Czechoslovakia in the mid-1930s. It appeared a little too late to compete with the similar Avia B-534 and failed to get a production order.

Design and development

The Praga E-45 single-seat fighter was designed to compete with the Avia B-534, but flew some 17 months later. Since the two aircraft had very similar performance and the Avia was more heavily armed, it is not surprising that the Avia won a contract for over 400 aircraft and only one E-45 was built.

The E-45 was an equal span, single bay biplane with wings of slight stagger and no sweep. They were largely of constant chord, but had marked elliptical tips. The wings were wooden with plywood covering and a final sheath of fabric, the upper wings a single piece, connected to and held above the upper fuselage by a pair of outward sloping N form struts. The lower wings were attached to stubs integral with the lower fuselage. N-form interplane struts joined the wings, which were wire braced. Aerodynamically balanced ailerons covered almost all the trailing edge of the lower wing.

Editorial summary

The public source identifies “Praga E-45” as biplane fighter prototype. This brief keeps that definition visible, then builds a research path around Praga, E-45 and biplane.

Editorial reviewA dependable orientation record for establishing vocabulary, names and a first evidence trail. The current 191-word lead offers orientation but no explicit four-digit date, so chronology should not be assumed. The selected authority fields contribute no independent date. Its value is orientation rather than verdict, with Praga, E-45 and biplane providing the first useful test.
Editorial analysis

Why this record matters

A short description can identify a subject without explaining its stakes. For “Praga E-45”, the useful work is to connect “biplane fighter prototype” to the records capable of establishing context and consequence.

Evidence profile

Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Sep 5, 2026. The linked authority identifier is Q2302055. None of the 0 selected statements returned an explicit reference.

Critical limits

A concise general-reference account can conceal disagreements about scope, terminology or the weight assigned to individual sources. 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.

Best used for
  • Subject orientation
  • Search vocabulary
  • Locating named sources
Verify next

The closest primary source, responsible institution and strongest cited specialist reference.

Three-step research path

  1. Establish the record: confirm the title “Praga E-45”, its source revision and the description used here.
  2. Expand the search: follow Praga E-45 primary sources, Praga E-45 archive and Praga research across catalogues and specialist indexes.
  3. Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.

Questions for further research

  1. Which source most directly establishes the central claim about “Praga E-45”?
  2. Which institution is responsible for the underlying evidence?
  3. What terminology or title could unlock a more precise catalogue search?
Subject index

Search terms from this dossier

Source & attribution

This entry incorporates text from Praga E-45” 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.