Boeing Model 307 Stratoliner
Wright Cyclone R-1820 & Hamilton Standard Propeller Documentation Collection
The Boeing Model 307 Stratoliner was the world's first pressurized commercial transport aircraft — a design that bridged the Boeing B-17 Flying Fortress heritage with the demands of high-altitude passenger service. This archival collection assembles the primary-source manufacturer documentation that supported the Stratoliner's core powerplant and propeller systems: the Wright GR-1820-G102A Cyclone 9-cylinder radial engine and the Hamilton Standard controllable and constant-speed propeller units.
Ten original factory and service publications are represented in this collection, spanning 1937 through 1944 — covering the full operational and maintenance lifecycle of these systems as installed on the 307 and its military C-75 variant.
Documents Included
- Boeing Model 307 Stratoliner — Technical data cover pages (Boeing Aircraft Company)
- Boeing SA-307 Flight Manual — 1954 revision; standard checklists, emergency protocols, weight & balance
- Hamilton Standard Controllable and Constant Speed Propellers — Service Manual No. 110C — Issued January 1, 1937 (Fourth Printing); supersedes Bulletins 110B and 120; Operation and Maintenance Instructions
- Hamilton Standard Constant Speed Control Service Manual No. 121A — Issued March 1, 1938; supersedes Bulletin No. 121; Installation, Operation and Maintenance Instructions
- Wright Cyclone 9 Aircraft Engine — Overhaul Manual (Third Edition, May 1940) — Series R-1820F-50/F-60 and GR-1820F-50/F-60, R-1820G and GR-1820G, GR-1820G-100; Direct and Geared Drives; Wright Aeronautical Corporation, Paterson NJ
- Wright Cyclone Aviation Engine — Installation, Operation and Maintenance Instructions (Third Edition, Second Printing, July 1939) — Models R-1820-G, GR-1820-G and GR-1820-G100; Wright Aeronautical Corporation
- R-1820 Engine — Air Depot Progressive Overhaul Manual (September 25, 1943 / Revised March 1, 1944) — RESTRICTED original; Otterbein Press, Dayton Ohio; ASCMD series
- Wright Cyclone Aircraft Engines — Parts Catalog (Catalog Part No. 851653) — Series GR-1820G-200; Wright Aeronautical Corporation, Paterson NJ
Understanding This Collection
These are original manufacturer service, overhaul, and parts publications — not reconstructed or synthesized documents. They reflect the engineering knowledge and approved procedures in force at the dates of issue. No revision-controlled update chain exists for out-of-production equipment of this era.
The Wright R-1820 Cyclone and Hamilton Standard propeller systems documented here were also installed across a wide family of contemporary airframes including the Boeing B-17, Douglas DC-3, and Sikorsky flying boats, giving this collection relevance beyond the Stratoliner alone.
Permitted Uses
Historical reference, flight simulation, museum restoration, aviation research, and educational study.
⚠️ Regulatory Notice: Under FAA 14 CFR § 43.13 and EASA Part-M, any mechanic performing maintenance on an active aircraft must use current, manufacturer-approved revision-controlled data. This archival documentation does not satisfy that requirement.
This is an archival, static-copy edition fixed at its original publication dates. Intended for historical reference, flight simulation, museum restoration, and educational use only. Not approved for active airworthiness maintenance under FAA 14 CFR § 43.13, EASA Part-M, or equivalent international regulations. Operators of active aircraft must use current, revision-controlled publications from the Type Certificate holder or an authorized distributor.
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