A structured digital reference archive centred on the Northrop YC-125A and YC-125B Raider, bringing together historical airframe documentation, supporting Wright Cyclone engine references, Curtiss Electric propeller publications and separately identified Sicuro Publishing research.
The emphasis is on original documentary evidence and clearly defined coverage. Supporting engine and propeller publications cover their respective families; inclusion does not establish exact applicability to every Raider installation.
Manuals — Airframe
- Handbook, Flight Operating Instructions, USAF Series YC-125A and YC-125B Aircraft — AN 01-15CAA-1, 15 January 1951; replaces the edition of 19 July 1950.
- Handbook, Erection and Maintenance Instructions, USAF Series YC-125A and YC-125B Aircraft — AN 01-15CAA-2, 12 June 1950.
- Parts Catalog, USAF Series YC-125A and YC-125B Aircraft — AN 01-15CAA-4, 3 May 1950.
Manuals — Engines
- Overhaul Manual, Wright Aircraft Engines Cyclone 9 GC — Third Edition, Part No. 114323-N3, October 1943.
- Operation and Service Manual, Wright Cyclone 9.
- Instruction Book, Wright Cyclone 9 Aircraft Engine, Series C9-GC: Installation, Operation and Service Maintenance — Second Edition, September 1942.
- Inspection and Service of the Wright Cyclone 9 GC.
Manuals and Publications — Propeller
- Instruction Manual for Curtiss Electric Propellers — Curtiss-Wright Corporation, Propeller Division.
- Pilot’s Manual — Curtiss Electric Propeller.
- The Curtiss Electric Propeller — illustrated publication.
Sicuro Publishing Reports
Northrop YC-125 Raider — Contextual Report, Revision 2, 26 October 2026. A modern research compilation addressing aircraft origins, variant differences, handbook-referenced systems and performance, service history and documentary discrepancies. The report distinguishes handbook-attributed statements, secondary-source history, unsupported claims and conflicts.
This editorial supplement is separate from the original USAF and manufacturer publications. It is not an original Northrop report, an official service bulletin, an approved systems manual or current operational guidance. Its source references are citations, not additional files included in the archive. Historical estimated performance figures must not be represented as measured flight-test results.
Format and Documentary Scope
Digital PDF reference material; no physical books or aircraft parts. Historical scans may show age-related marks and varying legibility. Matching cover copies of the same dated edition are not counted as separate titles. Coverage is limited to the publications identified above, not an exhaustive aircraft engineering archive.
Regulatory Notice
Historical and research reference only. These archival documents and modern commentary are not current approved airworthiness data and must not be used as authority for aircraft operation, maintenance, repair or return to service. Applicable current data and qualified professional oversight remain necessary.
Legal Notice
This digital compilation, structure, indexing and presentation are © Sicuro Publishing. Rights in individual underlying documents remain with their respective holders. Online Aviation Library is an independent archival publisher, not Northrop, an OEM, a regulator or an authorized current technical-data provider. No affiliation or endorsement is implied.