Wright R-1300 Cyclone 7 Aircraft Engine Manuals Collection
This collection brings together original technical manuals covering the Wright R-1300 Cyclone 7 — the compact, seven-cylinder single-row radial engine that powered the North American T-28A Trojan trainer, the Sikorsky H-19 Chickasaw helicopter, and Goodyear's N-class blimps during the Korean War era and beyond.
Derived from the legendary Wright R-2600 Cyclone 14, the R-1300 was produced between 1949 and 1961 by the Wright Aeronautical Division of Curtiss-Wright Corporation, with additional production under license by Kaiser-Frazer and Lycoming. A total of 3,541 engines were built — 3,371 military and 170 civilian — making this a historically significant powerplant of the early Cold War period.
Whether you are restoring a T-28A Trojan, maintaining an H-19 Chickasaw, or researching this engine for historical purposes, these documents provide the authoritative technical foundation you need.
Manuals Included
- Wright Aeronautical Corporation Presents the Cyclone 7 — Wright Aeronautical Corporation, A Division of Curtiss-Wright Corporation, Wood-Ridge, New Jersey — Copyright 1946
- Wright R-1300 Cyclone 7 Aircraft Engine Illustrated Parts Breakdown Manual — NAVWEPS 02A-35KB-4 — Model R-1300-3D Aircraft Engines (Curtiss-Wright) — Supersedes AN 02A-35KB-4 Dated 15 October 1955, Revised 1 April 1959 — Published by Direction of the Chief of the Bureau of Naval Weapons
- Wright R-1300 Cyclone 7 Aircraft Engine Illustrated Parts Breakdown Manual — T.O. 2R-R1300-14 (formerly 02A-35KB-4) / Navy AN 02A-35KB-4 — Model R-1300-3, -3A, -3B Aircraft Engine — 15 October 1955, Revised 15 September 1957 — Published under Authority of the Secretary of the Air Force and the Chief of the Bureau of Aeronautics
- Wright R-1300 Cyclone 7 Aircraft Engine Illustrated Parts Breakdown Manual — T.O. 2R-R1300-14 — USAF Models R1300-1B, -3, -3A, -3C, -3D Aircraft Engines (Curtiss-Wright) — AF 41(608)-41602 / F41608-71-D-0973 — 25 January 1967, Change 5 — 15 June 1971 — Published under Authority of the Secretary of the Air Force
- Wright R-1300-3D Cyclone 7 Aircraft Engine Overhaul Manual — NAVWEPS 02A-35KB-3 — Handbook Overhaul Instructions — Navy Model R-1300-3D Aircraft Engines (Curtiss-Wright) — Replaces AN 02A-35KB-3 Dated 30 June 1953, Revised 1 March 1959 — 1 May 1961 — Published by Direction of the Chief of the Bureau of Naval Weapons
- Wright R-1300 Cyclone 7 Aircraft Engine Description Manual — "A Measure of Cyclone Power" — Part No. 855639 — First Edition, January 1945 — Wright Aeronautical Corporation, Paterson, New Jersey, U.S.A.
Engine Overview
- Type: Air-cooled, single-row, 7-cylinder radial
- Displacement: 1,301 cu in (21.32 litres)
- Power output: 700–800 hp
- Bore × Stroke: 6.125 in × 6.312 in (155.6 mm × 160.3 mm)
- Compression ratio: 6.20:1
- Weight: ~1,055 lb (dry)
- Fuel: 91/96 or 91/98 octane aviation gasoline
- Induction: Supercharged, Bendix Stromberg carburetors
- Reduction gear: 0.5625:1 (fixed-wing models)
- Production: 1949–1961 | 3,541 units total
- Type Certificate: Curtiss-Wright (Military) / Lycoming (Civil)
Key Variants
- R-1300-1: Standard fixed-wing version (800 hp) — North American T-28A Trojan
- R-1300-3: Direct-drive helicopter version — Sikorsky H-19 Chickasaw / S-55
- R-1300-4: Lighter-than-air version — Goodyear N-class blimps
- Commercial 990C7BA1: Agricultural use — Ayres Thrush / Rockwell Thrush Commander
Historical Significance
The R-1300 served as the primary trainer engine for the U.S. Air Force in the early 1950s via the T-28A Trojan, and saw extensive operational service during the Korean War through the H-19 Chickasaw helicopter. Post-war, it found a second life in agricultural aviation and remains airworthy today in a small number of restored T-28A Trojans and warbird collections.
Format & Delivery
- Format: PDF (high-resolution scans of original documents)
- Delivery: Instant digital download
- Files are delivered as compressed archives (RAR/ZIP). You will need a free extraction tool such as WinRAR or 7-Zip (Windows) or The Unarchiver (Mac) to open them. Once extracted, all files open as standard PDFs.
- Free lifetime updates — if we add new manuals to this collection, you receive them at no extra charge