Pratt & Whitney R-2800 Double Wasp Aircraft Engine Manuals Collection

This authoritative digital collection brings together the essential technical documentation for the Pratt & Whitney R-2800 Double Wasp — one of the most powerful, reliable, and historically significant air-cooled radial engines ever produced. Spanning overhaul handbooks, maintenance manuals, operators' guides, parts catalogs, and training documents from 1942 through 1977, this collection covers the full breadth of R-2800 variants and serves as an indispensable reference for A&P mechanics, warbird restorers, and aviation historians alike.

Definitive Collection with Free Lifetime Updates: This is a living collection that we continuously expand and refine. As we acquire additional R-2800 documentation, technical bulletins, or variant-specific materials, we update this collection and provide free lifetime updates to all purchasers. Your one-time purchase guarantees access to all future additions and improvements to this collection.

Historical Note

Designed in 1937 and first flown on 29 May 1940, the Pratt & Whitney R-2800 Double Wasp was conceived to fill the power gap between the 14-cylinder R-1830 Twin Wasp and the massive R-4360 Wasp Major. Manufactured not only by Pratt & Whitney but also under licence by Ford, Nash, Chevrolet, Buick, Continental, and Jacobs, the R-2800 entered production in 1939 and remained in production until 1960 — with more than 125,334 engines built.

An 18-cylinder, two-row air-cooled radial displacing 2,804.5 cubic inches (45.96 litres), the R-2800 was the first 18-cylinder radial to achieve 1 HP per cubic inch of displacement — a landmark in powerplant engineering. Initial output stood at 2,000 hp; late-model variants with water injection and advanced supercharging pushed beyond 2,400 hp. The C-series introduced forged cylinder heads, increased compression ratios, and water injection, while the engine's advanced fin geometry set new standards for air-cooled cylinder cooling.

In military service, the R-2800 powered the aircraft that defined Allied air superiority: the Vought F4U Corsair, Grumman F6F Hellcat, Republic P-47 Thunderbolt, Martin B-26 Marauder, Douglas A-26 Invader, and Northrop P-61 Black Widow. The Hellcat alone achieved a 19:1 kill ratio against Japanese aircraft; the Corsair destroyed more enemy aircraft than any other Allied fighter in the Pacific. The Thunderbolt's turbocharged R-2800 made it equally lethal as a high-altitude escort and a ground-attack platform across both theatres.

Post-war, the R-2800 transitioned seamlessly into commercial aviation, powering the Douglas DC-6, Convair 240/340/440, Martin 2-0-2, and Martin 4-0-4 on domestic and international routes throughout the 1950s. The Canadair CL-215 water-bomber extended the engine's operational life into aerial firefighting, a role in which it continues to serve today.

Manuals Included in This Collection

Overhaul Manuals

• Aircraft Engine Overhaul Mechanic R-2800 — Preliminary Instruction Manual (TL 703.P2, U.S. Army Air Forces Air Service Command, ~1942)
• Handbook of Overhaul Instructions — R-2800-5, -21, -27, -31, -35, -39, -41, -43, -51 (T.O. 02-10GA-3, RESTRICTED, October 5, 1942 / Revised 2 January 1943)
• Overhaul Manual — Double Wasp A and B Series Single Stage Engines, R-2800-5, -6, -21, -27, -31, -35, -39, -41, -43, -47, -51 (Part No. 49656, RESTRICTED, Third Edition, July 1943)
• Overhaul Manual — Double Wasp B Series Engines (Two-Stage Supercharger) (Part No. 72662, RESTRICTED, First Edition, November 1942)
• Overhaul Manual — Double Wasp B Series Two Stage Engines, R-2800-8, -10, -8W, -10W (NavAer 02-10GR-3 / Part No. 72662, Second Edition, January 1944)
• Overhaul Manual — Double Wasp C Series Single Stage Engines, R-2800-14W, -22, -22W, -28, -34, -34W, -36, -57, -73, -77, -81, -83, -85 (Part No. 96996, RESTRICTED, Third Revision, May 1, 1945)
• Overhaul Manual — Double Wasp (R-2800) CA Engines (Part No. 115635, December 1951 / Revised December 1955)
• Overhaul Manual — Double Wasp (R-2800) CB Engines (Part No. 166497, October 1955 / Revised August 1956)
• Overhaul Manual — Double Wasp (R-2800) CB Series (Part No. 166497, March 1957 / Revised August 1977)
• Overhaul Instructions — R-2800-18W Aircraft Engines (AN 02-10GD-3, RESTRICTED, Joint Authority AAF / Bureau of Aeronautics / Air Council of the United Kingdom, 1 November 1944 / Revised 15 May 1945)
• Overhaul Instructions — Chandler-Evans Water Injection Controls, Supplement to Double Wasp (R-2800) Overhaul Manual (Part No. 166497)

Maintenance Manuals

• Maintenance Manual — Double Wasp (R-2800) CB Engines (Part No. 166498, March 1953 / Revised December 1955)
• Maintenance Manual — Double Wasp CB Series (Part No. 166498, March 1957 / Revised October 1976)

Operating & Service Instructions

• Handbook of Operating Instructions — R-2800-5, -27, -39, -41, -43 Aircraft Engines (T.O. 02-10GA-1, RESTRICTED, February 10, 1943)
• Handbook of Service Instructions — R-2800-5, -21, -27, -31, -35, -39, -41, -43, -51 (T.O. 02-10GA-2, June 20, 1942 / Revised March 20, 1943)
• Operating Instructions — R-2800-14, -57, -73 and -77 Engines with Water Injection (PWA. OI. 57, RESTRICTED, October 30, 1944)
• Operating Instructions — R-2800 B Turbosupercharged Engines with Water Injection (PWA. OI. 45, RESTRICTED, March 14, 1944 / Revised May 29, 1944)
• Service Instructions — Bendix-Scintilla Cast Filled Aircraft Ignition Harness used on Pratt & Whitney R-2800 Engines (Scintilla Magneto Division, Bendix Aviation Corporation, Form L-147-2, Revised March 1947)

Operators Handbooks

• Operators Handbook — Double Wasp A and B Series Engines (Part No. 49655, First Edition, January 1942)
• Operators Handbook — Double Wasp C3 Engine (Part No. 48678, Third Edition, November 1941)

Parts Catalogs

• Parts Catalog — R-2800-44W, -48, -95 and -97 Aircraft Engines (AN 02A-10GF-4, 1 July 1951)
• Parts Catalog — R-2800-34, -57, -73, -77, -81, -83, -83A and -85 Aircraft Engines (Navy AN 02A-10GC-4 / USAF T.O. No. 2R-R2800-24, 1 April 1955)
• Illustrated Parts Catalog — Double Wasp CA-3, CA18, CB3, CB16 and CB17 Engines (Part No. 119472, Reissued May 1960 / Revised July 1974)
• Illustrated Parts Catalog — Double Wasp CA-3, CA18, CB3, CB16 and CB17 Engines (Part No. 119472, Reissued May 1960 / Revised December 1976)

Training & Reference Documents

• Pratt & Whitney Aircraft Service School Handbook — R-2800 Engine (Installation Test Operations / Sales Engineering, April 1948)
• CL-215 Aircraft Training Manual — Operation & Troubleshooting P&W R2800 Engine (Canadair Limited Montreal, prepared by R. Armour, Maintenance Instructor)

This collection spans the full production arc of the R-2800 — from the earliest wartime RESTRICTED overhaul instructions of 1942 through the definitive CB-series documentation revised as late as 1977 — covering military dash-number variants (-5 through -97), civilian CA/CB series, and operator-prepared training materials for the Canadair CL-215 water-bomber. Together these documents provide a reference framework that no single manual could offer alone.

Engineering Norms and Standards

The R-2800 was developed and maintained under Pratt & Whitney's own engineering standards, with military variants governed by applicable Army Air Forces and Navy Bureau of Aeronautics technical orders. The engine holds a current FAA Type Certificate (maintained by Pratt & Whitney), and active Airworthiness Directives and Service Bulletins continue to be issued for commercially operated and restricted-category aircraft. Compression ratios across variants range from 6.65:1 to 6.75:1; bore and stroke are 5.75 in × 6.00 in (146 mm × 152 mm); dry weight is approximately 2,360 lbs (1,073 kg); and approved fuel is 100/130 octane aviation gasoline.

Specialized Documentation

Beyond the core manuals in this collection, operators of airworthy R-2800-powered aircraft should be aware of ongoing FAA Airworthiness Directives applicable to specific dash-number variants, as well as Supplemental Type Certificates covering modern ignition upgrades, oil system improvements, and alternative fuel approvals. Type clubs and warbird associations (including the Warbird Information Exchange and individual type-specific groups) maintain active libraries of Service Bulletins and operational notes that complement the historical documentation provided here.

Where to Find Additional Documentation

Official Support: Pratt & Whitney (current Type Certificate holder) can provide current airworthiness documentation for commercially operated R-2800 installations. The FAA's Regulatory and Guidance Library holds all applicable ADs.
Historical Archives: The National Air and Space Museum, the National Archives (RG 342 and RG 72), and major warbird type clubs hold original engineering drawings, test reports, and variant-specific technical orders.
Specialty Vendors: Overhaul shops specialising in large radial engines (such as Covington Aircraft and Aero Recip) maintain current parts availability data and can advise on STC-approved modifications. Online Aviation Library continues to expand its R-2800 holdings as additional documentation is acquired.

Format and Delivery

All manuals are delivered as high-resolution PDF files, optimised for both on-screen reference and print use. Files are organised by document type and variant series for straightforward navigation. Download is available immediately upon purchase confirmation, with no expiry on access. Files are compatible with all standard PDF readers on Windows, macOS, iOS, and Android.

Disclaimer

These documents are provided for historical reference, research, and educational purposes. Always consult the current Type Certificate holder and applicable regulatory authority for airworthiness-critical maintenance decisions. No warranty is made as to the completeness or currency of any document for active maintenance use. All trade names and designations remain the property of their respective owners. Copyright © Sicuro Publishing.