Home

Donate
About AEHS

 

Hosted by Kionic

 

AEHS Home
Google
WWW enginehistory.org
Members
Bulletin Board
Piston Engines
Gas Turbines
Rocket Engines
Propellers
Superchargers
Accessories
Reference
Installations
Operation & Maintenance
Reno Reports
Stories & Essays
Biographies
Book Reviews
Collections
Dataplates
Restorations
AEHS Conventions
AEHS Calendars
Engine Pictures
Engine Locator
Links
Model Engines
Sounds
AEHS Gear
Features
ID Unknown
Authors' Page
Torque Meter Sales

"Seeing the future by searching the past — Securing the future by saving the past"

The Aircraft Engine Historical Society is a non-profit educational and historical society that fosters an appreciation of the people, art, and science associated with aircraft engine development, manufacture, and use.


Features

Liberty 12 Firing Order
12-Cylinder Firing Order Display
by Daniel D. Whitney

Most people look at tabulated V-12 firing orders with a degree of confusion and dismay. Not only does it first appear that the 12 cylinder sequence is random, the nomenclature often obstructs by introducing numbering schemes and letters such as A, B, L, R, D, G to describe the left and right banks. Also, manufacturers use different references as to the location of number one cylinder, it may be either next to the propeller, or on the anti-propeller end. And of course the engine might be either upright or inverted! In an effort to make V-12 firing orders comparable, the author uses a naming convention adapted from the German V-12 manufacturers. Over 60 engines are represented.

- more -
 
Video005

GRIFFON V12 Mk58 at Flying Legends 2008, Duxford

Rolls-Royce Griffon V-12 Mk58 is demonstrated at Flying Legends Air Show 2008. This engine powered late versions of Spitfire and Seafire

GRIFFON V12 Mk58 at Flying Legends 2008, Duxford

 

 

Torque Meter

Journal of the Aircraft Engine Historical Society

For seven years the AEHS published a prestigious quarterly journal, Torque Meter, which contained articles on all types of aircraft engines, both new and old. Topics included engines and the aircraft they powered with emphasis on the engine installation, propellers, accessories, cooling, operation, and maintenance.

Torque Meter is no longer published. However,

All Torque Meter Back Issues Are Still Available!

Searchable Torque Meter Table of Contents Volumes 1-7 (2002-2008) (488 K PDF)
Compiled by Jim Strobeck

Searchable Torque Meter Alphabetic Feature and Column Index (106 K PDF)
Compiled by Sandy Skinner

Most new articles are now published in the Members' Section

AEHS Members also have access to the Members' Bulletin Board

Join AEHS Now!

 


Help Needed

Rolls-Royce Merlin Book

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.

If anyone would like to provide me with such details they can e-mail me through

Dave Birch, Rolls-Royce Heritage Trust


In order to conserve bandwidth,
many of the images and references provided by the Aircraft Engine Historical Society require the use of
Portable Data Format (.pdf) and Tagged Image Format (.tif) file readers.
Readers for these file formats can be downloaded free of charge by clicking on the icons below.


The AEHS Needs Your Help!

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.


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


Change History Listed below is everything that has been added to the AEHS web site for the past two years plus selected earlier additions.
All are in reverse chronological order.
Use this to see what has been added since your last visit, or use your browser's search feature to find specific keywords.

10-30-2014 - AEHS November 2014 Calendar
10-30-2014 - Book Review: Rolls-Royce and the Halifax
10-27-2014 - Six Firing Orders Added to the 12-Cylinder Firing Order Display
10-25-2014 - Air Service Information Circular: Performance and Design of Five Representative Geared Aviation Engines (Members Section)
10-24-2014 - Air Service Information Circular: Standard Fifty-Hour Endurance Test of Three-Cylinder Lawrance Aviation Engine (Members Section)
10-23-2014 - Air Service Information Circular: Standard Test of Hercules Spark Plugs (Members Section)
10-22-2014 - 295 Air Service Information Circulars added to the AEHS Document Collection, courtesy of Robert J. Neal (Donor = Neal, Robert J)
10-19-2014 - The Story of Jerry Wilcox's R-2600 Restoration Continues
10-15-2014 - Early Contra-Rotating Propeller Videos: Brown B-2; Curtiss P-36
10-14-2014 - Stepping Stones to Jet Propulsion; Sir Frank Whittle’s 1928 Cranwell Thesis and the Unbuilt Jet Engine Demonstrator, by Dr. Fred Starr (Members Section)
10-13-2014 - The 1929 Whittle Turbojet Demonstrator: Britain’s Greatest Lost Opportunity? By Dr. Fred Starr (Members Section)
09-29-2014 - AEHS October 2014 Calendar
09-18-2014 - de Havilland Gipsy Minor Cutaway (Members Section)
09-17-2014 - Bristol Proteus Mk 755 Turboprop Cutaway (Members Section)
09-12-2014 - Bentley BR.1 and BR.2 Images; Cosmos Engines Brochure, c 1919. Courtesy of Dave Birch
09-10-2014 - Peter Law - SR-71 Propuslion System; P&W J58 Engine (JT11D-20) Presentation Video
09-09-2014 - Bristol/Snecma Olympus 593 Condorde Installation (Members Section)
09-08-2014 - Bristol/Snecma Olympus 593 Cutaway (Members Section)
09-07-2014 - Pratt & Whitney PW2037 Cutaway (Members Section)
08-28-2014 - AEHS September 2014 Calendar
08-27-2014 - Tom Fey's Kiekhaefer 0-45-1 Restoration Update (Members Section)
08-26-2014 - Pratt & Whitney JT9D-7R4 Cutaway (Members Section)
08-25-2014 - Pratt & Whitney JT8D-200 Cutaway (Members Section)
08-24-2014 - Bristol Hercules Cutaway (Members Section)
08-24-2014 - Rolls-Royce Eagle Cutaway (Members Section)
08-16-2014 - Book Review: The Electra Story
08-11-2014 - Napier Sabre II Cutaway (Members Section)
08-05-2014 - The Lockheed Electra Propulsion Story (Video)
07-31-2014 - de Havilland Gipsy Queen 71 Cutaway (Members Section)
07-30-2014 - Cirrus Bombardier Cutaway (Members Section)
07-29-2014 - Bristol Centaurus Cutaway (Members Section)
07-28-2014 - Bristol Proteus Cutaway (Members Section)
07-25-2014 - Planes of Fame 2014 Airshow Video Links
07-24-2014 - AEHS August 2014 Calendar
07-23-2014 - Book Review: Beast - The Top Secret Ilmor-Penske Engine
07-12-2014 - The BMW 803 Aircraft Engine (Members Section)
06-28-2014 - The Air Annual of the British Empire - 1938: British Engine Progress
06-27-2014 - The Air Annual of the British Empire - 1938: Fairey Metal Airscrews (Reed Licence)
06-23-2014 - The Air Annual of the British Empire - 1938: Accessories
06-23-2014 - AEHS July 2014 Calendar
06-19-2014 - The Air Annual of the British Empire - 1938: Rolls-Royce Engines
06-18-2014 - The Air Annual of the British Empire - 1938: de Havilland Aero Engines and Propellers
06-15-2014 - Wright R-3350 Engine Production at Chrysler's Dodge-Chicago Plant (Video)
06-14-2014 - The Air Annual of the British Empire - 1938: Alvis Aero Engines
06-14-2014 - The Air Annual of the British Empire - 1938: Armstrong Siddeley Aero Engines
06-14-2014 - The Air Annual of the British Empire - 1938: Bristol Aero Engines
06-14-2014 - The Air Annual of the British Empire - 1938: Cirrus Aero Engines
06-13-2014 - WWII Turbosupercharger Training Films
06-02-2014 - U.S. National Archives I Navy Bureau of Aeronautics Index
06-01-2014 - AEHS 2014 Convention Images: Planes of Fame Air Museum and Air Show, by Tom Fey (Members Section)
05-31-2014 - AEHS 2014 Convention Images: Planes of Fame Air Museum and Air Show (Members Section)
05-30-2014 - AEHS 2014 Convention Images: Yanks Air Museum (Members Section)
05-29-2014 - AEHS 2014 Convention Images: Wives' Adventures (Members Section)
05-26-2014 - AEHS 2014 Convention Images: San Diego Air & Space Museum Gillespie Field Restoration and Storage Facility (Members Section)
05-23-2014 - AEHS June 2014 Calendar
05-17-2014 - AEHS 2014 Convention Images: San Diego Air & Space Museum Restoration Facility (Members Section)
05-16-2014 - AEHS 2014 Convention Presentation: Philip Scranton - Making Jet Engines Work (Members Section)
05-15-2014 - Program Added to Each AEHS Convention Report
05-13-2014 - An Analysis of the Contra-Rotating Propellers on the 1943 Radioplane OQ-2 Gunnery Target Drone, by Tom Fey
05-13-2014 - AEHS 2014 Convention Images: San Diego Air & Space Museum (Members Section)
05-12-2014 - AEHS 2014 Convention Report
05-11-2014 - AEHS 2014 Convention Presentation: Jack Gordon - The Lockheed Martin Skunk Works® (Members Section)
05-11-2014 - AEHS 2014 Convention Presentation: Tom Anderson - SR-71 Inlet Design Issues and Solutions (Members Section)
05-11-2014 - AEHS 2014 Convention Presentation: Mike Nixon - Restoring German Aircraft Engines (Members Section)
05-10-2014 - AEHS 2014 Convention Presentation: William Pearce - Project MX-232 and the Studebaker XH-9350 (Members Section)
05-09-2014 - AEHS 2014 Convention Presentation: Paul Christiansen - The Westinghouse J40 (Members Section)
05-06-2014 - New Dataplates
04-23-2014 - Brian Mill's Griffon RUNS! (Members Section)
04-20-2014 - Pratt & Whitney T34 Drawings (Members Section)
04-18-2014 - AEHS May 2014 Calendar
04-16-2014 - New Links
04-07-2014 - Tom Fey's Kiekhaefer 0-45-1 Restoration Update (Members Section)
04-04-2014 - Rolls-Royce Merlin XX Installation, Mechanism, Carburetion and Lubrication Diagrams - AP 1590G
04-03-2014 - French Aero Engines, 1928
03-30-2014 - Propeller-Related Records at the UK National Archives at Kew --- Compiled by David Birch
03-23-2014 - AEHS April 2014 Calendar
03-23-2014 - Tom Fey's Mystery Contra-Prop Restoration (Members Section)
03-20-2014 - New Links
03-19-2014 - Ford's Aircraft Engine (Members Section)
03-15-2014 - Wright R-2600 Restoration
02-24-2014 - AEHS March 2014 Calendar
02-23-2014 - Tom Fey's Kiekhaefer 0-45-1 Restoration Update (Members Section)
02-12-2014 - Reorganized Members' Index
02-08-2014 - Reno 2013
02-02-2014 - Italian Air Force Museum
01-28-2014 - Comments on The Rolls-Royce Merlin Aero-Engine: Early Development 1933 - 1937
01-26-2014 - AEHS February 2014 Calendar
01-26-2014 - The US National Archives and Records Administration --- New Online Public Access Search Facility
01-25-2014 - AEHS 2014 Convention Schedule Additions
01-25-2014 - Engine Pictures from the Powerhouse Museum, Sydney, Australia
01-17-2014 - Tom Fey's Kiekhaefer 0-45-1 Restoration Update (Members Section)
01-10-2014 - New Links
01-01-2014 - AEHS 2014 Convention, San Diego, California, April 29 through May 2
12-31-2013 - AEHS 2013 Convention Images: In and Around Nottingham (Members Section)
12-27-2013 - AEHS 2013 Convention Images: Royal Air Force Museum Cosford (Members Section)
12-25-2013 - AEHS 2013 Convention Images: Imperial War Museum Duxford - The Fighter Collection (Members Section)
12-24-2013 - AEHS 2013 Convention Images: Imperial War Museum Duxford (Members Section)
12-23-2013 - AEHS 2013 Convention Images: Rolls-Royce Heritage Trust Collection (Members Section)
12-22-2013 - AEHS 2013 Convention Images: Rolls-Royce Learning Center (Members Section)
12-21-2013 - AEHS 2014 Calendar
12-16-2013 - The Rolls-Royce Merlin Aero-Engine: Early Development 1933 - 1937
12-15-2013 - AEHS Calendars
11-29-2013 - Added Engine List for Alberta Aviation Museum
11-29-2013 - Added Engine List for Canadian Aviation and Space Museum
11-26-2013 - An Aeroproducts Installation Engineer Remembers: Interviews with Robert Aukerman
11-23-2013 - US Space & Rocket Center Museum - The Atlas Launch System
11-10-2013 - Added Engine List for Bomber Command Museum
11-10-2013 - Added Engine List for Canadian Museum of Flight
11-11-2013 - How Supersonic Inlets Work, by J. Thomas Anderson
11-10-2013 - Added Engine List for Atlantic Canada Aviation Museum
11-10-2013 - Added Engine List for British Columbia Aviation Museum
11-08-2013 - US Space & Rocket Center Museum - The Redstone Engine
11-05-2013 - US Space & Rocket Center Museum - Early US Launch Vehicles
11-02-2013 - AEHS 2013 Convention Coverage
11-01-2013 - Tom Fey's Kiekhaefer 0-45-1 Restoration (Members Section)
10-28-2013 - US Space & Rocket Center Museum - The German V-2
10-27-2013 - US Space & Rocket Center Museum - Overview
10-03-2013 - Engine Locator: Canadian Warplane Heritage Museum
09-26-2013 - Aircraft Carburetors and Fuel Systems Conclusion: Priming and ADI Systems, Summary
09-22-2013 - Aircraft Carburetors and Fuel Systems: Fuel Injection
09-21-2013 - Aircraft Carburetors and Fuel Systems: Speed-Density Systems
09-15-2013 - Aircraft Carburetors and Fuel Systems: Floatless Carburetors — Bendix-Stromberg Pressure Carburetors
09-06-2013 - Mikulin AM-34 (M-34) Firing Order Display
09-05-2013 - Videos of What AEHS 2013 Conventioneers Will See During Their Tour of the Rolls-Royce Trent Production Line (5 Sep entry)
09-04-2013 - Aircraft Carburetors and Fuel Systems: Floatless Carburetors — Chandler Groves, Holley and Chandler Evans
08-25-2013 - Aircraft Carburetors and Fuel Systems: Ideas, People and Companies
08-24-2013 - Aircraft Carburetors and Fuel Systems: Modern Float-Type Carbutetors
08-23-2013 - Aircraft Carburetors and Fuel Systems: Float-Type Carburetors
08-18-2013 - Aircraft Carburetors and Fuel Systems: Aviation Fuels
08-17-2013 - Aircraft Carburetors and Fuel Systems: Introduction to Carburetion
08-11-2013 - Tom Fey’s Righter 2-GS-17 Runs at Oshkosh (Members Section)
08-10-2013 - Aircraft Carburetors and Fuel Systems: A Brief History
08-02-2013 - Official Frank Whittle Web Site
07-30-2013 - Tom Fey’s Righter 2-GS-17 Runs!!! (Members Section)
07-29-2013 - More Dataplate Images from Ted Koch
07-28-2013 - Pratt & Whitney JT-3 Disassembly (Members Section)
07-27-2013 - Bristol Hercules, Centaurus, and Proteus Performance Curves (Members Section)
07-26-2013 - Bristol Sleeve Valve and Turbine Engines (Members Section)
07-15-2013 - Frank Whittle's W2B Turbojet: United Kingdom versus United States Development
07-14-2013 - Data Plate Images from Ted Koch
07-13-2013 - New Additions to Tom Fey’s Righter 2-GS-17 Restoration (Members Section)
06-26-2013 - Rotol Propeller, Governor, Fan and Spinner Specifications (Members Section)
06-22-2013 - Rotol Propeller Control Units, Spinners, Fans and Feathering Pumps (Members Section)
06-17-2013 - Werner J. Blanchard, the Man Behind Aeroproducts Propellers
06-14-2013 - Wonderful BBC Documentary on the Supermarine Spitfire --- its People and Engines
06-09-2013 - McCook Field's 1918 Propeller Testing Laboratory (Members Section)
05-27-2013 - New Additions to Tom Fey’s Righter 2-GS-17 Restoration (Members Section)
05-26-2012 - The Curtiss-Wright Cyclone 7
05-26-2013 - Green G4-35 Images added to Royal Air Force Museum London (Hendon) Gallery
05-11-2013 - The UK National Archives at Kew - Your First Visit, by David Birch
05-03-2013 - Sorted List of Engines in Museums Worldwide
04-20-2013 - More Images of Andy Lloyd's 1913 Chalmers
04-20-2013 - New Additions to Tom Fey’s Righter 2-GS-17 Restoration (Members Section)
04-13-2013 - Fairchild (Ranger) Engines
04-11-2013 - German WWII Aircraft Engine Production
04-06-2013 - Jacobs Engines
04-02-2013 - New Additions to Tom Fey’s Righter 2-GS-17 Restoration (Members Section)
04-01-2013 - Numerous Engine Picture Captons Corrected (kudos to Fred van der Horst)
03-28-2013 - New Wright Dataplates
03-27-2013 - Added new museums in Germany to AEHS List of Engines in Museums
03-26-2013 - Added new museums in Austria, Belgium, Hungary, Italy, The Netherlands, Poland, Slovakia and Spain to AEHS List of Engines in Museums
03-25-2013 - Pratt & Whitney R-1830-43 Disassembly, Inspection and Reassembly (Members Section)
03-22-2013 - Added new UK and French Museums to AEHS List of Engines in Museums
03-18-2013 - New Additions to Tom Fey’s Righter 2-GS-17 Restoration (Members Section)
03-14-2013 - Turbocharger Development and Production, 1924 - 1945 (Members Section)
03-02-2013 - Added new USA Museums to AEHS List of Engines in Museums
02-27-2013 - Updates to AEHS List of Engines in Museums
02-25-2013 - Inside the de Havilland Gyron Junior, Courtesy of Bruce Vander Mark (Members Section)
02-22-2013 - New Additions to Tom Fey’s Righter 2-GS-17 Restoration (Members Section)
02-18-2013 - The Packard Variable Speed Drive, by Jerry Wells
02-14-2013 - Update to Brian Mills’ Rolls-Royce Griffon Restoration (Members Section)
02-12-2013 - Reno 2012 Photos by Dan Whitney (Members Section)
02-10-2013 - Reno 2012 Coverage
02-02-2013 - Jimmy Doolittle's Granddaughter: The theme of this video, correctly remembering history, is what the AEHS is all about.
02-01-2013 - New Additions to Tom Fey’s Righter 2-GS-17 Restoration (Members Section)
01-30-2013 - The Engineering Division Side Type Turbocharger, 1922 - 1924 (Members Section)
01-29-2013 - AEHS Document Collection Catalog Completed
01-14-2013 - New Additions to Tom Fey’s Righter 2-GS-17 Restoration (Members Section)
01-06-2013 - US Army Air Corps Turbocharger Development, 1919 - 1922 (Members Section)
01-04-2013 - Pratt & Whitney R-4360-20 Start
01-01-2013 - New Dataplates
01-01-2013 - Curtiss-Wright XR-4090
12-21-2012 - The First Turbosupercharged Aircraft Engine
11-20-2012 - Bill Pearce's Old Machine Blog (Aircraft, Automobiles and Engines)
11-11-2012 - Evzen Vsetecka's Aircraft Engine Photographs: Hundreds of Rare Engines from All Over Europe
11-10-2012 - Bill Bishop's Armstrong-Siddeley Cheetah Restoration (Members Section)
10-26-2012 - Brian Mills’ Rolls-Royce Griffon Restoration (Members Section)
10-22-2012 - Brian Mills’ Bristol Hercules 216 Restoration (Members Section)
10-19-2012 - New! Members’ Restoration Projects (Members Section)
10-02-2012 - Japanese Ha51-01 (22-cylinder radial) Images and Ha54-01 (36-cylinder radial) specs
09-27-2012 - Pre-WWI Engines from the Royal Air Force Museum London (Hendon), by David Birch
09-24-2012 - Cataloging of USAF Engineering Division Propeller Laboratory Memorandum Reports Begun
09-23-2012 - Cataloging of USAF Engineering Division Aircraft Laboratory Memorandum Reports Begun
09-11-2012 - AEHS Document Collection Catalog (Public Version)
09-10-2012 - AEHS Document Collection Catalog (Members Version with Access to Over 40 Engine Accessory Manuals)
09-05-2012 - Triptane --- the Super Fuel (Members Section)
08-31-2012 - New Section - Dataplates
06-01-2012 - Wright R-2600 Lockland Investigation, by Jay Smith
05-15-2012 - Cheetah Runs After 50 Years
04-30-2012 - Fuel Tests and Fuel Testing Methods Citations Added to Power Plant Laboratory Memorandum Reports (Document # = P41)
04-19-2012 - Catalog of Over 3,000 Reports from the USAF Flight Test Division. This is wonderful stuff!
04-15-2012 - The Curtiss CD-12 Engine, by Lanny Waguespack (Members Section)
04-04-2012 - The Junkers Jumo 213 Engine, by Doug Culy (Members Section)
03-29-2012 - Wright R-2600 Case History, by Jay Smith
03-21-2012 - Halford's H.1 in America by Dave Birch (Members Section)
03-19-2012 - New Video Link: Inside the cockpit of a DC-7B with Jeff Skiles and Sully Sullenberger.
03-10-2012 - New Pratt & Whitney R-2270 Images --- P&W's first two-row radial
03-09-2012 - Duesenberg Aircraft Engines by William Pearce (Members Section)
02-29-2012 - Surplus Merlins (Where did they all go?) (Members Section)
02-04-2012 - Aircraft Carburetor Air Scoops and Their Effect on Fuel-Air Ratio
02-01-2012 - Bristol Orion (Centaurus follow-on) Design Notes (Members Section)
01-26-2012 - Engine-Airplane-Carburetor Cross Reference (Members Section)
01-25-2012 - Airplane-Engine-Accessory Cross Reference (December 1943) (Members Section)
01-04-2012 - Napier Dagger VIII Construction Details (Members Section)
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)
12-05-2011 - Pratt & Whitney JT4A Installation in the Douglas DC-8 (Members Section)
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)
10-28-2011 - Pratt & Whitney Piston Engine Production
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
10-09-2011 - 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 09-09-2011 - Installation Drawings for 25 Aircraft Engines from 1924
08-31-2011 - Bristol Hercules 730 Construction Details (Members Section)
07-23-2011 - Characteristics of Fuels
07-21-2011 - The BMW 801 D-2 Kommandogerät (Control System) (Members Section)
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)
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
04-19-2011 - Junkers Jumo 222 Intellegence Reports
04-18-2011 - Daimler-Benz 600-Series Aircraft Engine Images
04-16-2011 - Images from the National Archives of the United Kingdom at Kew
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)
02-16-2011 - The de Havilland Goblin (Members Section)
12-28-2010 - R-R Merlin Gravity Diecasting (Members Section)
12-26-2010 - The de Havilland Ghost 48 (Members Section)
11-20-2010 - Manufacturing the Armstrong-Siddeley Cheetah X (Members Section)
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)
10-15-2010 - Training Female Labour (Members Section)
10-11-2010 - Propeller Blade Stress Measurement (Members Section)
09-19-2010 - Manufacturing the Continental A-40 (Members Section)
09-13-2010 - Flame Hardening: Heat-Treatment by the Shorter Process (Members Section)
09-06-2010 - Manufacturing Franklin Air-Cooled Aircraft Engines (Members Section)
08-29-2010 - Diamond Tools (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)
08-14-2010 - Manufacturing the S.U. Carburettor (Members Section)
08-10-2010 - Notes on Early Air-Cooled Engine Design, by Paul Dempsey (Members Section)
07-30-2010 - Hispano-Suiza 12-Y Manual Pages and Drawings (Members Section)
06-27-2010 - Notes on the Liberty Aircraft Engine
04-30-2010 - A-12 / SR-71 Propulsion, A Photo Essay by Richard E. Loftis (Members Section)
04-24-2010 - Manufacturing the Napier Sabre (Members Section)
04-14-2010 - Manufacturing the Packard-Built Merlin (Members Section)
04-11-2010 - Manufacturing the Allison V-1710 (Members Section)
03-28-2010 - Improving the Mercedes
03-04-2010 - Szydlowski-Planiol Supercharger Test Report, with Critique by Jerry Wells
02-21-2010 - Manufacturing the Rolls-Royce Merlin (Members Section)
01-23-2010 - XF-84H Propulsion, by John Leonard
12-30-2009 - Engine Installations (Members Section)
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
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)
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
12-31-2008 - The Liberty Engine and Torsional Vibration by Robert J. Raymond
11-30-2008 - USAF Engineering Division Finding Aid
05-21-2008 - Indexes for over 550,000 Air Force Documents
03-24-2008 - V-12 Firing Orders
10-03-2006 - The 120 HP Argyll -- Pioneer Sleeve Valve Aero-Engine
06-22-2006 - P&W Paint Specs
02-06-2006 - Index to Navy ADI(k) Microfilms of German Documents
06-07-2005 - Gas Turbine Engineering Experiences
10-28-2004 - USAF Case History Files Index
08-13-2003 - Packard Aero Engine Statistics
01-24-2003 - Air-Cooled Aircraft Engine Cylinders
01-16-2003 - Japanese Engine Designations, SSME Conclusion

... Plus much, much more that is older than two years.
Try the Google Search feature at the top of this page to search within the AEHS web site.