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The Rolls-Royce Heritage Trust is putting together a book about the Merlin engine. We would like to include a list of surviving engines, and to this end any help would be appreciated.

All that is required is the mark and serial number of the engine, be it airworthy, on display, in a museum aircraft or in private ownership. Engines must be complete or substantially complete - no wrecks. All marks are eligible for engines made in the UK, USA and Australia.

We hope to collect serial numbers of all Packard Merlins, including the -3, -7 and -9s, etc., in Mustangs/museums/privately owned (even those built by Continental). Any such knowledge about Merlins other than those in USA/Canada would also be helpful.

The owners of Precision Aerospace recently passed away, bringing an end to the Bristol projects. Sincere thanks to all who helped. -- David Bienvenu

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Please help the Aircraft Engine Historical Society achieve its mission. We need donations (click here to donate) and we need material for publication on this web site. If you wish to contribute material, you can find submission guidelines here. Please feel free to contact us about your article ideas.
We also need to borrow and scan your very rare manuals (Napier Sabre Overhaul, Napier Dagger, etc.). We have access to the more common ones.

Webmasters: Please feel free to link to this page of the AEHS site. Other pages may change and should not be linked.

02-01-2012 - Bristol Orion (Centaurus follow-on) Design Notes (Members Section)
01-26-2011 - Engine-Airplane-Carburetor Cross Reference (Members Section)
01-25-2012 - Airplane-Engine-Accessory Cross Reference (December 1943) (Members Section)
01-22-2012 - More Reno 2011 Photos (Members Section)
01-14-2012 - Reno 2011 Coverage
01-04-2012 - Napier Dagger VIII Construction Details (Members Section)
01-04-2012 - Book Review: Rocketbelt Pilot's Manual
12-31-2011 - Armstrong-Siddeley Tiger VIII Overhaul (Members Section)
12-28-2011 - Armstrong-Siddeley Cheetah IX Top Overhaul (Members Section)
12-18-2011 - General Electric CF6-50C Installed in Airbus A300B4 (Members Section)
12-14-2011 - General Electric I-16 Installation in the Bell P-59 (Members Section)
12-11-2011 - Images from the National Air and Space Museum, by John Fowler
12-10-2011 - Images from the National Museum of the United States Air Force, by John Fowler
12-05-2011 - Pratt & Whitney JT4A Installation in the Douglas DC-8 (Members Section)
11-28-2011 - Napier Dagger VIII added to 12-Cylinder Firing Order Display
11-17-2011 - El motor de la aviación: Completely Revised, Fall 2011 (Members Section)
11-14-2011 - WW1-Era Engine Images from the UK National Archives at Kew
11-13-2011 - Napier Sabre Overhaul (Members Section) Public Preview of Napier Sabre Service and Overhaul Tools
11-06-2011 - Pratt & Whitney JT4A Installation in the Boeing 707 (Membes Section)
11-05-2011 - Napier Lion Runs all Summer, 2011
10-28-2011 - Pratt & Whitney Piston Engine Production
10-23-2011 - New Features
10-22-2011 - AEHS 2011 Convention Presentation: Racing Development of the Rolls-Royce Merlin, by Dixon Smith (Members Section)
10-20-2011 - Wright's T35 Turboprop Engine, et al. — the Contest to Power the B-52
10-19-2011 - Engine-Related Records at the UK National Archives at Kew, Updated and Expanded
10-10-2011 - New Links
10-09-2011 - Correct Designations for Jet, Turboprop, Pulse Jet, Ram Jet and Rocket Engines (No dash between J, T, PJ, RJ, R and number after 15 May 1945)
09-30-2011 - Superchargers
09-23-2011 - AEHS 2011 Convention Presentation: Boeing’s Formidable B-52 Stratofortress Bomber (Members Section)
09-23-2011 - AEHS 2011 Convention Presentation: The Mighty B-52 (PowerPoint Slide Show with Music) (Members Section)
09-22-2011 - AEHS 2011 Convention Presentation: Modern Propellers for Warbirds (Members Section)
09-22-2011 - AEHS 2011 Convention Presentation: The Engine for the B-52 (P&W J57) (Members Section)
09-21-2011 - AEHS 2011 Convention Images: Flying Heritage Collection (Members Section)
09-21-2011 - AEHS 2011 Convention Images: Seattle Museum of Flight Restoration and Storage Facility (Members Section)
09-21-2011 - AEHS 2011 Convention Images: Seattle Museum of Flight (Members Section)
09-17-2011 - Carburetion
09-09-2011 - Installation Drawings for 25 Aircraft Engines from 1924
09-08-2011 - Book Review: The V12 Engine
09-04-2011 - AEHS 2011 Convention Report
09-03-2011 - Curtiss CD-12 added to 12-Cylinder Firing Order Display
09-02-2011 - Rolls-Royce Merlin Automatic Boost Control
08-31-2011 - Bristol Hercules 730 Construction Details (Members Section)
08-30-2011 - Allison V-1710 Construction and Installation Details
08-29-2011 - Pratt & Whitney H-3730 added to 12-Cylinder Firing Order Display
08-28-2011 - Pratt & Whitney X-1800 (H-2600) added to 12-Cylinder Firing Order Display
08-08-2011 - Updated List of Engines in Museums
07-23-2011 - Characteristics of Fuels
07-21-2011 - The BMW 801 D-2 Kommandogerät (Control System) (Members Section)
07-15-2011 - Lycoming XH-2470 added to 12-Cylinder Firing Order Display
07-01-2011 - Merlin vs Allison: Aircraft Engine Performance Analysis at Rolls-Royce, ca 1940 --- by Robert J. Raymond (web version)
06-21-2011 - German V-1 Flying Bomb - Construction and Power Unit (Members Section)
06-20-2011 - Manufacturing the de Havilland Gipsyqueen II - Part 3: Crankcase Top Cover, Camshaft, Gears, Final Engine Assembly and Test (Members Section)
06-18-2011 - de Havilland Comet 2 Engine Installation (Rolls-Royce Avon Mk 525)
06-16-2011 - Manufacturing the de Havilland Gipsyqueen II - Part 2: Pistons, Connecting Rods and Crankshaft (Members Section)
06-13-2011 - Vickers VC10 Engine Installation (Rolls-Royce Conway 42)
06-11-2011 - Manufacturing the de Havilland Gipsyqueen II - Part 1: Development, Features, Crankcase, Cylinder Barrel and Head (Members Section)
06-05-2011 - The Douglas XB-42 Propeller System (high-resolution version in the Members Section)
06-04-2011 - Rolls-Royce Conway
05-28-2011 - Merlin vs Allison: Aircraft Engine Performance Analysis at Rolls-Royce, ca 1940 --- by Robert J. Raymond
05-27-2011 - Comparison of Sleeve and Poppet-Valve Aircraft Piston Engines --- by Robert J. Raymond
05-24-2011 - AEHS 2010 Convention Presentation --- Shifting Gears in the Air: America and the Variable-Pitch Propeller, 1918 - 1938 (Members Section)
05-15-2011 - Daimler-Benz 600-Series Aircraft Engine Specifications
05-14-2011 - Gas Turbine and Propeller Blades from the Collection of Andrzej
05-11-2011 - Curtiss OXX Images added to Museo del Aire de Madrid
05-09-2011 - Book Review: Pioneer Mechanics in Aviation, by Giacinta Bradley Koontz
04-21-2011 - Napier Lion Runs! And Runs...
04-19-2011 - Junkers Jumo 222 Intellegence Reports
04-18-2011 - Daimler-Benz 600-Series Aircraft Engine Images
04-17-2011 - ID Unknown: can you identify these engines?
04-16-2011 - Images from the National Archives of the United Kingdom at Kew
03-31-2011 - El motor de la aviación: Revision 4 (Members Section)
03-30-2011 - El motor de la aviación: Revision 3 (Members Section)
03-29-2011 - El motor de la aviación: Revision 2 (Members Section)
03-28-2011 - El motor de la aviación: Revision 1 (Members Section)
03-20-2011 - Updates to Napier Lion Restoration
03-19-2011 - All About Allison Serial Numbers
03-18-2011 - Pressed Pistons, Part 2: Heat-treatment, Laboratory Control, Advantages of the Pressing Process (Members Section)
03-16-2011 - Pressed Pistons, Part 1: The Technique and Equipment Adopted by a Pioneer Firm (Members Section)
03-11-2011 - Powder Metallurgy (Members Section)
03-09-2011 - Steel-Tube Airscrew Blades: Production Technique of the American Propeller Corporation (Members Section)
03-08-2011 - Machining Cylinder Fins: Special-Purpose Maxicut Lathe for Aero-Engine Work (Members Section)
03-07-2011 - Magnesium Casting: Chevrolet Production of P&W Engine Parts (Members Section)
03-06-2011 - Supercharger Development in the U.S. During the Inter-War Period
03-05-2011 - Light Alloy Foundry Technique: Metal Patterns, Cores and Moulds (Members Section)
03-03-2011 - Light Alloy Forging: Large Scale Production by Chevrolet (Members Section)
02-26-2011 - British Magnesium (Members Section)
02-26-2011 - Magnesium from Seawater (Members Section)
02-26-2011 - Magnesium Surface Protection (Members Section)
02-25-2011 - Gravity Diecasting, Part 3. Ageing and Solution Treatment, Material Inspection, Five Alloy Specifications (Members Section)
02-23-2011 - Gravity Die Casting, Part 2. The Rolls-Royce Foundry Arrangement , Inspection (Members Section)
02-19-2011 - Book Review: Overhaul of Merlin Engines in India and the USSR
02-16-2011 - The de Havilland Goblin (Members Section)
02-08-2011 - Book Review: Alex Moulton: Bristol to Bradford-on-Avon---a lifetime in engineering
02-07-2011 - Notes on WWI German Superchargers, by Paul Dempsy
01-28-2011 - Book Review: The Rolls-Royce Tay Engine and the BAC One-Eleven
01-25-2011 - Book Review: Parkside: Armstrong Siddeley to Rolls-Royce, 1939 - 1994
01-16-2011 - Book Reviews: Fedden, Boxkite to Jet
12-28-2010 - R-R Merlin Gravity Diecasting - Part 1 (Members Section)
12-27-2010 - The de Havilland Ghost 48 - Part 2: Lubrication, Fuel and Ignition Systems (Members Section)
12-26-2010 - The de Havilland Ghost 48 - Part 1: Engine Components (Members Section)
12-22-2010 - El motor de la aviación: PRATT & WHITNEY/ALLISON ~ Appendix 3 (Members Section)
12-19-2010 - El motor de la aviación: JUNKERS ~ PRATT & WHITNEY (Members Section)
12-15-2010 - El motor de la aviación: ENGEL ~ JSF (Members Section)
12-12-2010 - El motor de la aviación: A.A Mikulin ~ ENERGOMASH (Members Section)
12-12-2010 - El motor de la aviación, Spanish, Nearly Every Aircraft Engine Ever Built, all 3,200 Pages! (Members Section)
12-12-2010 - Why Internal Combustion, by Paul Dempsy (Members Section)
12-11-2010 - Reno 2010 Coverage
12-09-2010 - Reno 2010 Coverage (Members Section)
11-25-2010 - The Armstrong-Siddeley Cheetah X, Part 2: Cylinder, Induction Cover, and Crankcase (Members Section)
11-20-2010 - The Armstrong-Siddeley Cheetah X, Part 1: Design, Machining the Crankshaft and Master Rod (Members Section)
11-13-2010 - Teaneck Ignition Service Engine Collection, New Links, Engine Testing (Members Section)
11-06-2010 - AEHS 2010 Convention Presentations
10-31-2010 - Fw 190 and BMW 801 (Members Section)
10-30-2010 - Hydulignum Propeller Blades (Members Section)
10-23-2010 - Material Testing (Members Section)
10-19-2010 - Homebuilt Radial, Salmson P-9
10-17-2010 - New Pratt & Whitney Museum Images
10-15-2010 - Training Female Labour (Members Section)
10-11-2010 - Propeller Blade Stress Measurement (Members Section)
10-08-2010 - Curtiss-Wright TC18DA Specifications
09-19-2010 - Manufacturing the Continental A-40 (Members Section)
09-14-2010 - Pratt & Whitney R-4360-59B Specifications
09-13-2010 - Flame Hardening: Heat-Treatment by the Shorter Process (Members Section)
09-06-2010 - Manufacturing Franklin Air-Cooled Aircraft Engines (Members Section)
09-04-2010 - The Manufacture of Diamond Tools: Wheel Dressers, Shaped Tools and Hardness Indentors (Members Section)
09-03-2010 - Thread Grinding: Diamond Tools and Crushing Equipment for Form-Dressing Wheels (Members Section)
09-02-2010 - Diamond Tools, Part 2: Boring Tools, Lathe Tool Holders, Milling Cutter, Speeds and Feeds (Members Section)
08-29-2010 - Diamond Tools, Part 1: Cutting Angles, Methods of Mounting, Types of Holders (Members Section)
08-24-2010 - Notes on Hispano-Suiza WW1 Engines, by Paul Dempsey (Members Section)
08-21-2010 - Propeller Manufacture: Electric Airscrews, Jablo and Steel Airscrew Blades (Members Section)
08-15-2010 - A-12 / SR-71 Propulsion Part 3: J58 Walk Around (Members Section)
08-14-2010 - Manufacturing the S.U. Carburettor (Members Section)
08-10-2010 - Notes on Early Air-Cooled Engine Design, by Paul Dempsey (Members Section)
07-31-2010 - Piston and Gas Turbine Engines from Airventure 2010
07-30-2010 - Hispano-Suiza 12-Y Manual Pages and Drawings (Members Section)
07-25-2010 - Images from the NASM Udvar-Hazy and Garber (Members Section)
07-24-2010 - Wright Turbocompounds, by Carl Kuhns
07-18-2010 - Images from the NASM Paul E. Garber Restoration and Storage Facility (Members Section)
06-27-2010 - Notes on the Liberty Aircraft Engine
06-26-2010 - Building the Napier Sabre Engine Balancing, Assembly, Supercharger and Engine Testing(Members Section)
06-22-2010 - Excerpts from El motor de la aviación (De la "A" a la "Z") - French, Italian and Spanish engines (Members Section)
06-09-2010 - Building the Napier Sabre Engine Crankshaft, Connecting Rods, Sleeve and Sleeve Ball (Members Section)
05-09-2010 - A-12 / SR-71 Propulsion Part 2: The J58 Engine (Members Section)
04-30-2010 - A-12 / SR-71 Propulsion Preview
04-30-2010 - A-12 / SR-71 Propulsion Part 1: The Airframe (Members Section)
04-24-2010 - Building the Napier Sabre Engine Crankcase and Cylinder Block (Members Section)
04-14-2010 - Manufacturing the Packard-Built Merlin (Members Section)
04-11-2010 - Building the Allison V-1710 Engine (Members Section)
04-07-2010 - Manufacturing the Rolls-Royce Merlin, Part 4 (Members Section)
03-31-2010 - Manufacturing the Rolls-Royce Merlin, Part 3 (Members Section)
03-28-2010 - Improving the Mercedes
03-18-2010 - Book Review: Douglas Light Aero Engines: From Kingswood to Cathcart
03-06-2010 - Manufacturing the Rolls-Royce Merlin, Part 2 (Members Section)
03-04-2010 - Test Report on the Szydlowski-Planiol Supercharger, with Critique by Jerry Wells
03-02-2010 - Bristol Centaurus Cutaway by Brian Peaden
02-21-2010 - Manufacturing the Rolls-Royce Merlin, Part 1 (Members Section)
02-04-2010 - Engine Related Records in the UK National Archives at Kew
01-24-2010 - Book Review: The Engines of Pratt & Whitney
01-24-2010 - Restorations: Napier Lion
01-23-2010 - XF-84H Propulsion, by John Leonard
01-10-2010 - Reno - 2009 (Members Section)
12-30-2009 - Engine Installations (Members Section)
11-22-2009 - SNECMA ATAR 9C as Used in the Mirage III
11-21-2009 - Table of US Engine Details, provided by Larry McClellan (PDF, XLS)
11-15-2009 - The Westinghouse Aviation Gas Turbine Division 1950-1960
11-07-2009 - Rolls-Royce Tyne Mk 22 as used on the Transall C160Z
10-25-2009 - The Engines of Brodhead, The Opposed (Members Section)
10-09-2009 - The Engines of Brodhead, The Radials (Members Section)
09-12-2009 - Queensland Air Museum, by Bruce Vander Mark
09-11-2009 - Report from the Sixth Annual AEHS Convention
09-06-2009 - The Engines of Brodhead, The Vees (Harroun, Hispano-Suiza, OX-5, etc.) (Members Section)
08-29-2009 - Book Review -- A Technical & Operational History of the Liberty Engine
08-25-2009 - General Aviation Piston and Turboprop Images
08-24-2009 - Gas Turbine Observations
08-22-2009 - How Many Valves?, by Kevin Cameron (History of Number of Valves per Cylinder, Members Section)
08-22-2009 - The Engines of Brodhead, a Photo Essay by Richard E. Loftis (Members Section)
07-09-2009 - Merlin 23 Images, New Reference Links
06-30-2009 - Western Canada Aviation Museum, Rotax 912
06-25-2009 - The WW I Austro-Daimler Aero Engines of Ferdinand Porsche
05-26-2009 - Boeing Model 377 Stratocruiser Propeller Woes, by Carl Kuhns (128K PDF)
05-26-2009 - The Engineering Division W-1: A Tale of Great Expectations, by Robert J. Neal (Members' Section)
05-11-2009 - R-4360 Cutaway
04-27-2009 - Members' Section Added to the AEHS Web Site
02-23-2009 - R-4360 Service History for C-97 and KC-97 Aircraft in Air National Guard Units
02-08-2009 - Blower Drive Failures in Wright Turbo Compound Engines
01-19-2009 - Aeroproducts Propeller Failure
12-31-2008 - The Liberty Engine and Torsional Vibration by Robert J. Raymond
12-15-2008 - Torque Meter Table of Contents, Volumes 1-7
11-30-2008 - USAF Engineering Division Finding Aid
08-24-2008 - Ken Royce 5F
05-21-2008 - Indexes for over 550,000 Air Force Documents
05-14-2008 - Florida Air Museum
04-03-2008 - Armstrong-Siddeley
03-24-2008 - New V-12 Firing Orders
03-12-2008 - Additions to Propellers Section
03-10-2008 - Additions to Diesels Section
02-24-2008 - Commonwealth Aircraft Corporation
02-17-2008 - Musee de L’Air et Espace, Le Bourget, SNECMA Museum
01-14-2008 - Mighty Eighth Air Force Museum, Master Motor Builders Reviewed
01-14-2008 - Soviet Helicopter Gas Turbines
12-28-2007 - Gas Turbine Blades
11-16-2007 - Science Museum Images, Including 50hp Antoinette
11-14-2007 - Napier Images
11-06-2007 - Wright Turbo Compound Facts
08-07-2007 - USAF Engineering Division Finding Aid now searches across all organizations
04-28-2007 - de Havilland Aircraft Heritage Centre Engines
03-20-2007 - Junkers Jumo 211
03-15-2007 - Power of the Past Museum
03-08-2007 - Engines in Hungarian Museums
01-25-2007 - Bristol Hercules Sounds, Rolls-Royce Derwent Mk5 Engine Model
01-18-2007 - Derby Industrial Museum and Museo Del Aire, by John Martin
01-12-2007 - Japanese Engines, Expanded Carburetor Usage Database
01-11-2007 - Jacobs Post-WWII Auction Details
10-03-2006 - The 120 HP Argyll -- Pioneer Sleeve Valve Aero-Engine
09-20-2006 - Continental IV-1430 Video (2.5 MB WMV), Chrysler XI-2220
09-19-2006 - Rare and Exotic Pratt & Whitney Piston Engines
09-18-2006 - New England Air Museum
09-17-2006 - Transport Museum, Budapest
09-02-2006 - Pratt & Whitney Customer Training Center and Museum
08-18-2006 - Report Excerpt from "Problems of Accelerating Aircraft Production During World War II"
06-22-2006 - P&W Paint Specs
02-19-2006 - Italian Engines, British Fasteners
02-06-2006 - Index to Navy ADI(k) Microfilms of German Documents
01-30-2006 - Model Engines in Barcelona
11-22-2005 - Napier
11-07-2005 - Gnome Omega Sounds
08-30-2005 - Early Jet Aircraft Mechanic
06-07-2005 - Gas Turbine Engineering Experiences
05-18-2005 - Commemorative Air Force B-29 "Fifi" Maintenance
05-11-2005 - Brian Perkins' Model Bristol Hydra
05-09-2005 - Japanese Engines (Ha32-21 and Ha32-22)
05-02-2005 - P&W J58 Images
02-01-2004 - Brian Perkins' Model Bristol Aquila and BP 75
12-01-2004 - Design Details of the Mitsubishi Kensei Engine
12-01-2004 - Design Details of the BMW-801A Engines
11-30-2004 - Messerschmitt Me-262 Airframe and Engine
10-28-2004 - USAF Case History Files Index
08-22-2004 - Excerpts from 1939 Wright Aero Installation Manual
08-11-2004 - Pratt & Whitney J58 Last Run
06-01-2004 - The Making of a Flight Engineer, Part 6
09-04-2003 - Sounds
08-13-2003 - Packard Aero Engine Statistics
01-24-2003 - Air-Cooled Aircraft Engine Cylinders
01-16-2003 - Japanese Engine Designations, SSME Conclusion