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"Seeing the future by searching the past — Securing the future by saving the past" -- Alex Pong
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

Pratt & Whitney R-4360
Air-Cooled Aircraft Engine Cylinders
An Evolutionary Odyssey
by George Genevro

Should aircraft engines be liquid-cooled or air-cooled? This "difference of opinion" is about a hundred years old and without a doubt the argument will continue as long as piston engines power the airplanes we fly.

 
Curtiss-Wright R-3350
Curtiss-Wright R-3350 Motorized Cutaway

With two rows of nine cylinders, R-3350s developed between 2,200 and 3,700hp depending on the model. Note the mechanical fuel injection system.
Cutaway Color Coding:
  Light Blue = Air
  Red = Fuel
  Yellow = Oil
  White = Cutaway

 

Torque Meter V1N1

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!

 
Torque Meter V7N4

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!

 


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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.

12-08-2018 - Bristol Hercules 100 Descripton (Members Section)
12-08-2018 - Bristol Centaurus 660 Descripton (Members Section)
12-08-2018 - Bristol at War and the Future (Members Section)
12-06-2018 - AEHS Newsletter #4
12-01-2018 - Vintage Airline Posters
12-01-2018 - BMW 801 Crankshaft Animations
12-01-2018 - Junkers Jumo 213 Animation
12-01-2018 - Wright R-2600-29 150hr Model Test (Members Section)
12-01-2018 - Walter Werke-Kiel Propulsion Duct Research (Members Section)
12-01-2018 - Riedel Model RBA/S10 Two-Cylinder Engine Starter (Members Section)
12-01-2018 - Wright Cyclone R-1820-88 (918C9HE1) Engine Specification (Members Section)
12-01-2018 - Lockheed Model 1449 Super Constellation Turboprop with P&W T34 (Members Section)
11-13-2018 - Studebaker XH-9350 Aircraft Engine
11-06-2018 - Junkers Aircraft and Engine Facilities (Members Section)
11-06-2018 - Junkers Gas Turbines (Members Section)
11-06-2018 - Heinkel Turbine Engine Activity (Members Section)
11-06-2018 - German Aircraft (and Engine) Maintenance (Members Section)
11-05-2018 - Wright Cyclone 9HE Engins for the Douglas Super DC-3 (Members Section)
11-04-2018 - A German Assessment of the Allison V-1710 Aircraft Engine
11-04-2018 - Wright Cyclone 9HD Specification (Members Section)
11-04-2018 - Wright Cyclone 9 Power Unit for Douglas DC-4 (Members Section)
11-04-2018 - BMW 018 Turbojet Design Analysis (Members Section)
11-02-2018 - The BMW 003 Engine (Members Section)
11-01-2018 - BMW 003 Turbojet Design Analysis (Members Section)
11-01-2018 - Continental A-50 Series Specification, 1940 (Members Section)
11-01-2018 - Continental Engine Price List, 1952 (Members Section)
11-01-2018 - Continental Model PA-108A Series C85 Controllable Pitch Propeller 50-hr Endurance Test1 (Members Section)
11-01-2018 - de Havilland Gnome P.1200 Turboprop Installation Specification (Members Section)
10-16-2018 - AEHS 2018 Convention Coverage
10-15-2018 - Studebaker XH-9350 Firing Order
10-11-2018 - Lycoming Engines in WWII Production
10-11-2018 - Lycoming Wartime Engine Model Specifications
  O-145-A3 Spec No. 1082 (Members Section)
  O-145-B3 Spec No. 1084 (Members Section)
  GO-145-C3 Spec No. 1088 (Members Section)
  GO-145-C4 Spec No. 1089 (Members Section)
  O-235 Spec No. 1080-B (Members Section)
  O-235-A Spec No. 1081-A (Members Section)
  O-290-A Spec No. 1079-D (Members Section)
  O-290-C Spec No. 2012-C (Members Section)
  O-290-D Spec No. 2069-C (Members Section)
  O-350 Spec No. 1076-D (Members Section)
  O-435-A Spec No. 1075-C (Members Section)
  O-435-B Spec No. 2016 (Members Section)
  O-435-C Spec No. 2010-D (Members Section)
  O-435-T Spec No. 1092-B (Members Section)
  GO-435 Spec No. 2015 (Members Section)
  GO-435-B Spec No. 2014 (Members Section)
  R-680-E3A Spec No. 1047-D (Members Section)
10-08-2018 - The Caminez V-2120 Engine (Members Section)
10-08-2018 - Curtiss H-1640 Dynamometer Calibration (Members Section)
10-01-2018 - Pratt & Whitney ‘CA’ Double Wasp Inside Information (Members Section)
09-13-2018 - Flugausstellung L+P Junior Museum
09-11-2018 - Stromberg Direct Fuel Injection System Operating and Service Instructions (Members Section)
09-11-2018 - Wright Cyclone 18 Fuel Injection and Low Tension Ignition (Members Section)
09-10-2018 - Italian Aircraft Engines, 1939 (Alfa Romeo, Fiat, Isotta Fraschini, Piaggio) (Members Section)
09-10-2018 - Grant Marine Brochure (Curtiss and Liberty Marine Conversions) (Members Section)
09-09-2018 - Description du Moteur Rotatif Burlat (Members Section)
09-09-2018 - Maybach VL-2 Added to V-12 Firing Order Display
09-08-2018 - Maybach VL-2 Manual (Members Section)
09-08-2018 - Maybach VL-2 Brochure (Members Section)
09-08-2018 - Maybach VL-1 Brochure (Members Section)
09-03-2018 - AEHS Newsletter #3
09-01-2018 - Maybach Mb IVa 260 ps Parts Catlaog (Members Section)
09-01-2018 - Packard-Built V-1650, Rolls-Royce Merlin XXVII Engineering Information
08-22-2018 - Fuel Injection for the Aircraft Engine
08-22-2018 - Packard Diesel DR-980 Instruction Manual (Members Section)
08-21-2018 - The General Electric J47
08-10-2018 - Pratt & Whitney R-4360 Brochure (Members Section)
08-09-2018 - Des Hélices Aériennes - A 1909 Propeller Design Text
08-06-2018 - Rolls-Royce Nene Turbo Jet Aero Engine Brochure (Members Section)
08-06-2018 - Rolls-Royce Dart Propeller Turbine Aero Engine Brochure (Members Section)
08-03-2018 - Lorraine 1932 Engine Catalog (Members Section)
08-03-2018 - Lorraine 12 Eb Specification and Detailed Description (Members Section)
08-01-2018 - Lorraine 18 Kd Specification and Detailed Description (Members Section)
08-01-2018 - Lorraine 12 Hfrs Specification and Detailed Description (Members Section)
08-01-2018 - Care and Adjustment of Metal Propellers (Navy, 1926) (Members Section)
08-01-2018 - Comet Engine Corp Double-Acting Diesel (Members Section)
07-18-2018 - Lorraine 12Hfrs Added to V-12 Firing Order Display
07-11-2018 - Daimler-Benz DB 601N Installation in Messerschmitt ME 109E (Members Section)
07-11-2018 - Propeller Icing and Its Prevention (Translated from German) (Members Section)
07-11-2018 - Summary Report on German Argus, Junkers, VDM Propellers (Members Section)
07-10-2018 - The Deschamps Aircraft Diesel
07-09-2018 - WWI-Era Engine Reports and Power Curves, 1917 (Members Section)
07-07-2018 - Air Board Engine Book (Members Section)
07-04-2018 - WWI Engine Power Curves, 1917 (Members Section)
07-04-2018 - Packard 1A-1237 Final Specifications (Members Section)
07-04-2018 - Jacobs L-4, L-5, L-6 Series Specifications, Data, Installation Drawings (Members Section)
07-02-2018 - Renault (SNECMA) 12 S (Argus As 411)
07-01-2018 - Ranger SVG-770
07-01-2018 - Ranger SVG-770 Internal Details (Members Section)
06-14-2018 - AEHS Newsletter #2
06-11-2018 - The Hamilton Standard Superhydromatic Propeller
06-01-2018 - Ranger L-440 Specifications and Internal Details
06-01-2018 - Schubert Valveless Engine
06-01-2018 - Moteur Sarolea type Epervier
06-01-2018 - Wright-Tuttle (Renard License) Aircraft Motor
06-01-2018 - Everel Single-Blade Propeller
06-01-2018 - Metal Propellers Ltd
06-01-2018 - Metal Propellers Ltd Advertisement
06-01-2018 - Scott Flying Squirrl Light Aero Engine (16/34 bhp) Mark A.2.S
06-01-2018 - Report on (postwar) Visit to Daimler-Benz A.G.
06-01-2018 - Visits to Miscellaneous Aeronautical Establishments in the British Zone
06-01-2018 - Turbine Engine Activity at Ernst Heinkel Aktiengesellschaft
06-01-2018 - Hoover Hydraulic Controllable Pitch Propeller Models P40F400 and P40F500
06-01-2018 - Hoover Hydraulic Constant Speed Propeller Models P42F300 and P43F250
05-24-2018 - Propeller Shaft Dimensions
05-20-2018 - Kenneth Zetterlund’s Wright R-3350 TC Runs
05-12-2018 - More Jacobs Aircraft Engine History
05-01-2018 - Request for Data R40-A Engine Evaluation (P&W X-1800, Wright R-2160, Continental XH-2860, Allison V-3420 competition.)
05-01-2018 - Junkers Jumo 004 Technical Description
05-01-2018 - Smith Controllable Pitch Propeller
05-01-2018 - Siemens Sh 20 Aircraft Engine
05-01-2018 - Skymotor Aircraft Engines
05-01-2018 - Sunbeam-Coatalen Aero Engines
05-01-2018 - Tank Aero Engine
05-01-2018 - Moteur L.V. Thomas 2T-SS (2 Temps - San Soupapes)
05-01-2018 - Thomas Aeromotors
05-01-2018 - Super Rhone Radial Aircraft Engine
05-01-2018 - Moteurs Train Aviation
05-01-2018 - U2 Leichtflug Motor
05-01-2018 - Moteur A.L. Varcin A Crémailéres et Secteurs de Renversement de Mouvement
04-24-2018 - Velie 70hp Aircraft Motor
04-24-2018 - The Weir Aero Engine
04-24-2018 - Western Airplane Motor
04-24-2018 - Wolverine Aero 25-30hp Aircraft Engine
04-24-2018 - Zundapp 50ps Flugmotor
04-24-2018 - The Zeitlin Aero Engine
04-23-2018 - The Fedden Mission to America: Section 4 – Engines, Power Plants and Propellers
04-18-2018 - The Jacobs R-755
04-14-2018 - Jacobs L-4 and L-5 Power Curves and Specifications
04-13-2018 - The Seppeler Propeller on the Messerschmitt Me-163
04-06-2018 - Daimler-Benz DB603A Details
04-06-2018 - Daimler-Benz DB601A,B Details
04-06-2018 - The Liberty Motor
03-26-2018 - Book Review: The Power for Flight
03-24-2018 - Junkers Jumo 211 Photographs
03-23-2018 - Junkers Jumo 205-C and 207 Diesel Engines Outstanding Features
03-21-2018 - Curtiss OX-5 Overhaul Methods
03-20-2018 - Bendix PS Series Carburetor Manual
03-08-2018 - Pratt & Whitney TF30-12, -12A Engine Characteristics Card
03-08-2018 - Pratt & Whitney TF30-P-1, -1A Engine Characteristics Card
03-08-2018 - Westinghouse XJ40-WE-1 Engine Characteristics Card
03-08-2018 - Wright Aero YJ67-W-3 Engine Characteristics Card
03-08-2018 - Wright Aero YT47-W-1 Engine Characteristics Card
03-08-2018 - Wright Aero YT49-W-1 Engine Characteristics Card
03-08-2018 - AEHS Newsletter #1
03-03-2018 - More BMW 801 Animations, by Sergio Pasquali
02-26-2018 - Continental C-Series Engines and Their Derivatives: The C-115 and C-125
02-25-2018 - Continental C-Series Engines and Their Derivatives: The C75 and C85
02-07-2018 - Reno 2017 (High-Resolution Images in the Members Section)
01-31-2018 - Pratt & Whitney R-4360 Valve Train Development
01-12-2018 - Engine Images from the MTU Museum
01-09-2018 - Engines in Museums: The MTU Museum
01-03-2018 - Evaporative Cooling, Part 1: Through WWII
01-03-2018 - Evaporative Cooling, Part 2: Post WWII
12-28-2017 - WWII Gunnery Target Engine Technical Analysis Revised: Part 5; Part 6
12-19-2017 - Pratt & Whitney R-985 CAD Rendering by Stephen Stanley
12-17-2017 - Engine Pictures from Mike Smith
  Mighty Eighth Air Force Museum
  National Air and Space Museum
  Museum of Aviation - Robins AFB
  Virginia Air & Space Museum
12-10-2017 - de Havilland Propeller Brochure (Members Section)
12-10-2017 - BMW 801 Animation, by Sergio Pasquali
12-03-2017 - BMW 003 Intelligence Reports and Correspondence (Members Section)
12-01-2017 - Wright TC18EA Cutaways and Schematics (Members Section)
12-01-2017 - Wright Turbo Compound Power Recovery Turbine Removal and Disassembly (Members Section)
11-24-2017 - Wright Cyclone Power Measurement (Members Section)
11-23-2017 - Wright Student Notebook: 2. Power Curves (Members Section)
11-23-2017 - Wright Student Notebook: 7. The Wright Torque Indicator (Members Section)
11-19-2017 - Book Review: The Wright Brothers: 1904 & 1905
11-11-2017 - Book Review: Sonic Wind
11-09-2017 - Thirty Four New Documents Added to the AEHS Document Collection, Compliments of Miriam Seymour
               Including Propeller and Governor Application List (Members Section)
11-07-2017 - AEHS 2017 Convention Presentations (Members Section)
 The Westinghouse J46, by Paul Christianson
  Westinghouse J46 Axial Turbojet
  Project Cutlass, a Vought F7U-3 Restoration
 Allison Special Projects, by John Leonard
  Part 1. Allison Books and Sample Pages, Airship Propulsion
  Part 2. U-Cylinder Engines, V-3420 Naval Applications, Lasley Turboprop
  Part 3. Supersonic Propellers
  Part 4. Combined Engines
  Part 5. Concept Engines
 The Junkers Jumo 213, by Douglas Culy
 The Modern V-1710 Allison, by Bud Wheeler
11-06-2017 - AEHS 2017 Convention Images by Ted Koch (Members Section)
11-01-2017 - AEHS 2017 Convention Images by Tom Fey (Members Section)
10-31-2017 - AEHS 2017 Convention Coverage
10-12-2017 - Wright Gipsy Installation, Inspection and Maintenance Instructions (Members Section)
10-12-2017 - de Havilland Gipsy 85/100 Aero Engine Care and Maintenance (Members Section)
10-12-2017 - de Havilland Gipsy 100hp Aero Engine Brochure (Members Section)
10-12-2017 - Wright Gipsy History (Members Section)
09-22-2017 - The Evolution of Crankshaft Design in High Output In-Line Aircraft Piston Engines --- by Robert J. Raymond
09-10-2017 - Pratt & Whitney Valve Adjustment Guides (Members Section)
09-10-2017 - U.S. Navy Aircraft Ground Check Data
09-10-2017 - Pratt &Whitney R-2800-34, -34W, -36, -83, -85 Operating Data (Members Section)
08-31-2017 - Engine Power Calculators (Members Section)
08-14-2017 - Pratt & Whitney Canada PT6A
  Part 1: Construction (Members Section)
  Part 2: Air System (Members Section)
  Part 3: Lubrication System (Members Section)
  Part 4: Ignition System (Members Section)
  Part 5: Fuel System (Members Section)
  Part 6: Controls and Instrumentation (Members Section)
  Part 7: Propeller Reversing (Members Section)
08-08-2017 - Murray Rotary Engines (Members Section)
08-02-2017 - Book Review: Japanese Aero Engines 1910 - 1945
07-19-2017 - Book Review: Hucknall –the Rolls-Royce Flight Test Establishment, by David Birch
07-01-2017 - The Manley Engine: Langley Memoir on Mechanical Flight
07-01-2017 - Pratt & Whitney Family Day Brochure, 1944
07-01-2017 - Hamilton Standard Family Day Brochure, 1953
06-22-2017 - CAD Models by Stephen Stanley
06-19-2017 - WWII Gunnery Target Engine Technical Analysis:
  Part 1. Background and General Configuration
  Part 2. The Righter 2-GS-17 (O-15-1) in Detail
  Part 3. The Righter O-15-3 Engine
  Part 4. Performance and Efficiency Comparison between O-15-1 and O-15-3 Engines
  Part 5. The O-45-1 and Kiekhaefer O-45-35
  Part 6. Performance and Efficiency Comparison between O-45-1 and O-45-35 Engines
  Part 7. Conclusion
06-18-2017 - The Aeromarine/Robinson R-13 "Cootie" Airplane and Engine
06-07-2017 - A Pictorial Review of United Aircraft Corp at War (Members Section)
06-07-2017 - La Produzione Motoristica Tedesca (Members Section)
06-07-2017 - Lambert R-266 Instruction Book (Members Section)
06-07-2017 - Comparison of Air-Cooled and Liquid-Cooled 4-Engine Monoplane Engine Installations (Members Section)
06-07-2017 - Formica Pulleys, Fairleads, Bushings, Cabin Lining (Members Section)
06-07-2017 - Hamilton Standard Propellers (Members Section)
06-07-2017 - Lorenzen Propellers (Members Section)
06-07-2017 - General Electric Tachometer (Members Section)
05-07-2017 - Exide Battery Installation and Operation Instructions (Members Section)
05-07-2017 - The Sperry Gyro-Horizon and the Directional Gyro (Members Section)
05-07-2017 - Pioneer Instruments Brochure (Members Section)
05-07-2017 - Weston Engine Temperature Indicator (Members Section)
05-07-2017 - Weston Electric Tachometer (Members Section)
05-07-2017 - Flying with the Sperry Horizon and Directional Gyro (Members Section)
05-07-2017 - Elmer Carries On: Sperry A-3 (MK 3) Gyropilot Operating Bulletin (Members Section)
05-07-2017 - Jaeger Tachometer and True-Airspeed Indicator (Members Section)
05-06-2017 - Manual of Stromberg Aircraft Carburetors, Edition III (Members Section)
05-06-2017 - Aeromarine Inertia Starter Instruction Book (Members Section)
05-06-2017 - Eclipse Aviation Generator Instruction Book (Members Section)
05-06-2017 - Eclipse Aviation Starters and Generators (Members Section)
05-06-2017 - Eclipse Aircraft Accessory Equipment (Members Section)
05-06-2017 - Eclipse Aircraft Accessory Equipment (Members Section)
05-06-2017 - Lunkenheimer Aircraft Specialties (Members Section)
05-06-2017 - Coffman Engine Starter (Members Section)
05-05-2017 - B.G. Spark Plug Sales Brochure (Members Section)
05-05-2017 - B.G. Spark Plug Service and Maintenance Manual (Members Section)
05-05-2017 - H-T Aviation Spark Plug Data (Members Section)
05-05-2017 - Mosler Aviation Spark Plugs (Members Section)
05-05-2017 - The Aircraft Magneto (Members Section)
05-05-2017 - Boost Control for Aero Engines (Members Section)
05-05-2017 - Marvel Aircraft Fuel Injection Systems (Members Section)
05-05-2017 - Manual of Stromberg Aircraft Carburetors, Edition II (Members Section)
05-01-2017 - Book Review: Reinventing the Propeller Aeronautical Specialty and the Triumph of the Modern Airplane, by Jeremy R. Kinney
04-19-2017 - U.S. Reciprocating Aircraft Engine General Specifications (Members Section)
04-13-2017 - Mike Grimes’ LeBlond 7D Engine Restoration (Members Section)
04-13-2017 - Fiat Engines at the Second Annual New York Aviation Show Brochure (Members Section)
04-13-2017 - Frederickson Model 5A 2-Cycle 5-Cylinder Rotary Engine Brochure (Members Section)
04-13-2017 - Les Productions Farman Department Moteur Brochure (Members Section)
04-13-2017 - Moore-Power Three-Valve Engine Brochure (Members Section)
04-13-2017 - Rover (R-267) Aviation Engine Brochure (Members Section)
04-13-2017 - Gipsy Aero Engines Brochure (Members Section)
04-12-2017 - Isotta Fraschini Moteurs D'Aviation Brochure (Members Section)
04-12-2017 - Kinner C-5 210 hp Aircraft Engine Brochure (Members Section)
04-12-2017 - Walter NZ 120/135 hp Licensed by Spartan Brochure (Members Section)
04-12-2017 - Wright Whirlwinds 320 and 450Brochure (Members Section)
04-11-2017 - The Caminez (440-C) Engine Brochure (Members Section)
04-11-2017 - Continental Aircraft Engine (A70) Brochure (Members Section)
04-11-2017 - Le Quadri-Moteur Breguet Brevet Bugatti Brochure (Members Section)
04-11-2017 - Packard - Master Motor Builders Brochure (Members Section)
04-11-2017 - The Packard Diesel Aircraft Engine Brochure (Members Section)
04-10-2017 - Bliss Jupiter Aircooled Radial Aero Engine Brochure (Members Section)
04-10-2017 - Bliss Titan Aircooled Aero Engine Brochure (Members Section)
04-10-2017 - Menasco M-50 Engine Brochure (Members Section)
04-10-2017 - Pratt & Whitney Aeronautical Engines Brochure (Members Section)
04-10-2017 - Sturtevant Model 5A, 5A-4 1/2 Airplane Engines Brochure (Members Section)
04-10-2017 - Mike Grimes’ Heath Cannon Ball Racer Engine Restoration (Members Section)
04-01-2017 - Defective Engine Parts
03-21-2017 - Aeronautical Products Corp Scorpion Installation Drawing (Members Section)
03-21-2017 - Aircooled Motors 4-AC-150, 4-AC-171 Installation Drawing (Members Section)
03-21-2017 - Fairchild-Caminez 440-C Installation Drawing (Members Section)
03-21-2017 - Fairchild 6-390 Installation Drawing (Members Section)
03-21-2017 - Kimball Beetle Model K Installation Drawing (Members Section)
03-20-2017 - Chevrolet Model 333 Installation Drawing (Members Section)
03-20-2017 - Continental A70-650 Installation Drawing (Members Section)
03-20-2017 - Continental A75 Series 3 Installation Drawing (Members Section)
03-20-2017 - Continental A75 Series 3J Installation Drawing (Members Section)
03-20-2017 - Ranger IV-770-SG Installation Drawing (Members Section)
02-27-2017 - Sixty-Six New Citations Added to AEHS Document Collection (Donor = Koch, Theodore)
02-24-2017 - Continental A-Series Engines: Fuel Injection (Members Section)
02-10-2017 - Index to high-quality YouTube videos about gas turbines
02-07-2017 - Nacelles, by Carl Kuhns
01-29-2017 - Aircraft Engine Company Employee Publications: Siemens & Halske Siemens Aircraft News
01-29-2017 - Aircraft Engine Company Employee Publications: Junkers Junkers Nachrichten
01-29-2017 - Aircraft Engine Company Employee Publications: BMW BMW Flugmotoren-Nachrichten
01-29-2017 - Aircraft Engine Company Employee Publications: S.G.A. Revue de la Societe Generale Aeronautique
01-29-2017 - Aircraft Engine Company Employee Publications: Potez Bulletin Technique des Avions H. Potez
01-29-2017 - Aircraft Engine Company Employee Publications: Hispano-Suiza Paris Revue Technique Hispano-Suiza
01-29-2017 - Aircraft Engine Company Employee Publications: Hispano-Suiza Paris Revue a Bulletin Technique de la Societe Francaise Hispano-Suiza
01-27-2017 - Aircraft Engine Company Employee Publications: Gnome-Rhone Gnome Rhone Journal
01-26-2017 - Additional Reno 2016 Images (Members Section)
01-23-2017 - Aircraft Engine Company Employee Publications: Walter Bulletin Walter
01-22-2017 - Reno 2016 (High-Resolution Images in the Members Section)
01-19-2017 - Aircraft Engine Company Employee Publications: Armstrong Siddeley The Armstrong Siddeley Air-Mail
01-19-2017 - Aircraft Engine Company Employee Publications: Bristol Aeroplane Co The Bristol Review Engine Issue
01-17-2017 - Aircraft Engine Company Employee Publications: Wright-Martin Aircraftings
01-16-2017 - Aircraft Engine Company Employee Publications: Pratt & Whitney The Bee-Hive
01-16-2017 - Aircraft Engine Company Employee Publications: Pratt & Whitney Missouri The Wasp Nest
01-15-2017 - Aircraft Engine Company Employee Publications: Lycoming The Lycoming Star
01-15-2017 - Aircraft Engine Company Employee Publications: Lyciming The Lycoming Starduster
01-14-2017 - Aircraft Engine Company Employee Publications: Kirkham The Kirkham News
01-14-2017 - Aircraft Engine Company Employee Publications: Jacobs Plane Power
01-13-2017 - Aircraft Engine Company Employee Publications: Fairchild Aviation News
01-13-2017 - Aircraft Engine Company Employee Publications: Fairchild (Ranger)t Cloudbuster
01-12-2017 - Aircraft Engine Company Employee Publications: Curtiss-Wright The Tradewind
01-12-2017 - Aircraft Engine Company Employee Publications: Curtiss-Wright Curtiss-Wright Review
01-12-2017 - Aircraft Engine Company Employee Publications: Curtiss-Wright Sales and Service Newsletter
01-12-2017 - Aircraft Engine Company Employee Publications: Curtiss-Wright Trade Winds
01-12-2017 - Aircraft Engine Company Employee Publications: Curtiss-Wright Propeller Division Bladesman
01-12-2017 - AEHS 2017 Convention Announced
01-10-2017 - Aircraft Engine Company Employee Publications: Chandler-Evans The Air Box
01-09-2017 - Aircraft Engine Company Employee Publications: Allison Service Division Tale Spins
12-28-2016 - Westinghouse J-46 Part 4: Electrical System
12-26-2016 - Westinghouse J-46 Part 3: Fuel System
12-24-2016 - Westinghouse J-46 Part 2: Lubrication System
12-21-2016 - Wright Cyclone Licensees, by Carl Kuhns
12-18-2016 - Westinghouse J46 Part 1: Overview
12-14-2016 - AEHS Member Calum Douglas’ Account of Research for His Upcoming Book The Secret Horsepower Race Calum Douglas’  Web Site
12-08-2016 - Book Review: Jim Allison’s Machine Shop: The First 30 Years
12-07-2016 - American Aircraft Engine Specifications circa 1924 (Members Section)
12-07-2016 - British Aircraft Engine Specifications circa 1924 (Members Section)
12-07-2016 - French Aircraft Engine Specifications circa 1924 (Members Section)
12-07-2016 - German Engine Specifications circa 1924 (Members Section)
12-07-2016 - Italian Engine Specifications circa 1924 (Members Section)
12-06-2016 - Air Service Engineering Division Special Report (Members Section)
12-06-2016 - Air Service Materiel Division Activity Report (Members Section)
11-29-2016 - AEHS December 2016 Calendar
11-28-2016 - Chevrolet Aircraft Engines
11-28-2016 - Chevrolair Model D-4, D-6 Booklet (Members Section)
11-28-2016 - Chevrolet Model D-333 Brochure (Members Section)
11-28-2016 - Chevrolet-333 Booklet (Members Section)
11-28-2016 - Martin 333 Booklet (Members Section)
11-28-2016 - Martin 333 Techical Description and Cylinder Design Notes (Members Section)
11-26-2016 - Book Review: Westinghouse J46 Axial Turbojet Family
11-24-2016 - Menasco Aircraft Engines
11-24-2016 - Menasco Aircraft Engines and Their Air Racing Heritage, Part 1
11-24-2016 - Menasco Aircraft Engines and Their Air Racing Heritage, Part 2
11-24-2016 - Menasco Model B6S "Buccaneer" Engine Handbook (Members Section)
11-24-2016 - Menasco B-6 160 HP Buccaneer Brochure (Members Section)
11-24-2016 - Menasco B6 160 HP Buccaneer Brochure (Members Section)
11-24-2016 - Menasco B6S 200 HP Buccaneer Brochure (Members Section)
11-20-2016 - AEHS 2016 Convention Images: NMUSAF Aircraft and Engines, by Tom Fey (Members Section)
11-17-2016 - AEHS 2016 Convention Images: NMUSAF Restoration and Storage Facility (Members Section)
11-11-2016 - AEHS 2016 Convention Images: NMUSAF Engines (Members Section)
10-31-2016 - AEHS November 2016 Calendar
10-20-2016 - AEHS 2016 Convention Presentations (Members Section)
10-18-2016 - AEHS 2016 Convention Coverage
10-11-2016 - ASIC No. 380: Air Service Technical Bulletin (Formerly Technical Orders) No. 30 (Members Section)
10-11-2016 - ASIC No. 379: Air Service Technical Bulletin (Formerly Technical Orders) No. 29 (Members Section)
10-11-2016 - ASIC No. 378: Air Service Technical Bulletin (Formerly Technical Orders) No. 28 (Members Section)
10-11-2016 - ASIC No. 377: Air Service Technical Orders No. 27 (Members Section)
10-11-2016 - ASIC No. 351: Air Service Technical Orders No. 26 (Members Section)
10-06-2016 - Air Service Technical Orders No. 17 (Members Section)
10-06-2016 - Air Service Technical Orders No. 16 (Members Section)
10-06-2016 - Air Service Technical Orders No. 15 (Members Section)
10-06-2016 - Air Service Technical Orders No. 14 (Members Section)
10-06-2016 - Air Service Technical Orders No. 13 (Members Section)
10-05-2016 - Air Service Technical Orders No. 12 (Members Section)
10-05-2016 - Air Service Technical Orders No. 11 (Members Section)
10-05-2016 - Air Service Technical Orders No. 10 (Members Section)
10-05-2016 - Air Service Technical Orders No. 9 (Members Section)
10-05-2016 - Air Service Technical Orders No. 8 (Members Section)
10-05-2016 - Air Service Technical Orders No. 7 (Members Section)
10-04-2016 - Air Service Technical Orders No. 6 (Members Section)
10-04-2016 - Air Service Technical Orders No. 5 (Members Section)
10-04-2016 - Air Service Technical Orders No. 4 (Members Section)
10-04-2016 - Air Service Technical Orders No. 3 (Members Section)
10-04-2016 - Air Service Technical Orders No. 2 (Members Section)
10-04-2016 - Air Service Technical Orders No. 1 (Members Section)
10-01-2016 - AEHS October 2016 Calendar
09-16-2016 - New Dataplate Images by Cameron Jenkins
09-08-2016 - ASIC No. 682: Indicator Study of SV-1570 Engine (Members Section)
09-08-2016 - ASIC No. 670: The Difficulties of Prestone Cooling at 300° F Outlet Temperature (Members Section)
09-08-2016 - ASIC No. 648: Instructions for Assembly of Detachable Blade Propellers (Members Section)
09-08-2016 - ASIC No. 638: Test of Liberty 12 Engine with Various Piston Rings and Arrangements (Members Section)
09-08-2016 - ASIC No. 630: Dynamometer Carburetion Runs on Curtiss GV-1570 Engines (Members Section)
09-08-2016 - ASIC No. 611: Aircraft Ignition, Recent Developments (Members Section)
09-07-2016 - ASIC No. 596: Fire Hazard Tests of Ignition Equipment (Members Section)
09-07-2016 - ASIC No. 595: Comparison of Wood Propeller Wind Tunnel and Flight Tests (Members Section)
09-07-2016 - ASIC No. 594: Exhaust Equipment Temperature Determinations (Members Section)
09-07-2016 - ASIC No. 589: Power Plant Laboratory Standard Test Methods and Computation (Members Section)
09-06-2016 - ASIC No. 576: Air Service Technical Bulletin No 50 (Members Section)
09-06-2016 - ASIC No. 575: Air Service Technical Bulletin No 49 (Members Section)
09-06-2016 - ASIC No. 572: Development and Test of Stromberg NA-Y5D Carburetor for Curtiss D-12 Engine (Members Section)
09-06-2016 - ASIC No. 570: Development and Test of Zenith ED-52 Carburetor for Liberty 12 Engine (Members Section)
09-06-2016 - ASIC No. 551: First 50-Hour Test of the Air Cooled Liberty Engine (Members Section)
09-05-2016 - ASIC No. 550: Standard Engine Tests of Curtiss D-12 High and Low Compression Engines (Members Section)
09-05-2016 - ASIC No. 525: Piston Side Thrust in the Modified R-1 and Single Cylinder Test Engine (Members Section)
09-05-2016 - ASIC No. 523: Endurance Test of Liberty Engine with Various Experimental Materials (Members Section)
09-05-2016 - ASIC No. 505: Computing the HP Available from Engines with Two-Bladed Propellers (Members Section)
09-05-2016 - ASIC No. 504: Instructions for Reinforcing Liberty Cylinders (Members Section)
09-04-2016 - ASIC No. 350: Air Service Technical Orders No 25 (Members Section)
09-04-2016 - ASIC No. 349: Air Service Technical Orders No 24 (Members Section)
09-04-2016 - ASIC No. 348: Air Service Technical Orders No 23 (Members Section)
09-03-2016 - ASIC No. 337: Air Service Technical Orders No 22 (Members Section)
09-03-2016 - ASIC No. 333: Test of 300 HP Hispano-Suiza Model H Engine Fitted with 6.5:1 Compression Ratio Pistons (Members Section)
09-03-2016 - ASIC No. 309: Stromberg Type NA-D6 Carburetor Fuel-Consumptionon Improvement (Members Section)
09-02-2016 - ASIC No. 284: Packard Model 1A-1116 Performance with 6.5:1 Compression Ratio (Members Section)
09-02-2016 - ASIC No. 281: The Sylphon Fuel Pump for Liberty 12 and Wright Model H Engines (Members Section)
09-02-2016 - ASIC No. 279: Fifty-hour Endurance Test of Hispano-Suiza Model H with Cracked Crankcase (Members Section)
09-02-2016 - ASIC No. 257: Instructions to Pilots for the use of Mixture Controls (Members Section)
09-02-2016 - ASIC No. 223: Induction System Pressures in Liberty 12 and 300 HP Hispano-Suiza Engines (Members Section)
09-02-2016 - ASIC No. 218: Report on the Performance of the 5.5-inch by 6.5-inch Smith Cylinder Unit (Members Section)
09-01-2016 - ASIC No. 199: Test of a Standard Liberty Cylinder Mounted on a Universal Engine Crankcase (Members Section)
09-01-2016 - ASIC No. 192: Ten-Hour Endurance Test of Lawrance All-Aluminum Cylinder (Members Section)
09-01-2016 - ASIC No. 190: Test of Odier Portable Engine Starter (Members Section)
08-25-2016 - AEHS September 2016 Calendar
08-21-2016 - ASIC No. 179: Report of Wind-Tunnel Test of the Effect of Rake Angle on Suction in Exhaust Stubs (Members Section)
08-21-2016 - ASIC No. 175: Instructions for Installing 85-A Mixture Control in Zenith US-52 Carburetors (Members Section)
08-21-2016 - ASIC No. 170: Fifty-Hour High Speed Endurance Test of 300 HP Hispano-Suiza (Members Section)
08-20-2016 - ASIC No. 168: Test of Lucas Electric Engine Starter (Members Section)
08-20-2016 - ASIC No. 163: Air Service Technical Orders No 21 (Members Section)
08-20-2016 - ASIC No. 162: Air Service Technical Orders No 20 (Members Section)
08-20-2016 - ASIC No. 161: Air Service Technical Orders No 19 (Members Section)
08-20-2016 - ASIC No. 160: Air Service Technical Orders No 18 (Members Section)
08-19-2016 - ASIC No. 151: Delco Automatic Generator Cut-Out (Members Section)
08-19-2016 - ASIC No. 145: Investigation of Steel Propeller X-14849 (Members Section)
08-18-2016 - ASIC No. 138: 185 HP BMW German Aviation Engine Calibration (Members Section)
08-18-2016 - ASIC No. 137: Destructive Whirling Test of Aero Marine Propeller (Members Section)
08-18-2016 - ASIC No. 135: Fifty-Hour Endurance Test of Packard Model 1A-744 8-Cylinder Aviation Engine (Members Section)
08-18-2016 - ASIC No. 134: Flight Test of Packard Fuelizer on Liberty 12 (Members Section)
08-18-2016 - ASIC No. 131: 300 HP Hispano-Suiza Compression Relief Device Torque Stand and Flight Test (Members Section)
08-17-2016 - ASIC No. 130: Standard 50-Hour Endurance Test of Packard Aviation Engine Model 1A-1116 (Members Section)
08-17-2016 - ASIC No. 126: Starting Torque on Liberty, Hispano-Suiza, and other Aviation Engines (Members Section)
08-17-2016 - ASIC No. 41: Report on the Six-Cylinder Benz Aeronautic Engine Rated at 200 HP (Members Section)
08-16-2016 - ASIC No. 17: Whirling Test of Micarta and Rubber-Covered Propellers (Members Section)
08-16-2016 - ASIC No. 12: Micarta Liberty Propeller (Members Section)
08-16-2016 - ASIC No. 8: Whirling Test of Micarta and Rubber-Covered Propellers (Members Section)
08-08-2016 - Pratt & Whitney Multi Row Engine Installation Drawings (Members Section)
08-07-2016 - Pratt & Whitney Single Row Engine Installation Drawings (Members Section)
08-01-2016 - Airventure 2016 Engines, by Tim Wheat
07-31-2016 - AEHS August 2016 Calendar
07-21-2016 - Turbomeca Artouste Airborne Auxiliary Power Plant Control and Electrical Systems
07-20-2016 - Turbomeca Artouste Airborne Auxiliary Power Plant Oil and Air Systems
07-19-2016 - Turbomeca Artouste Airborne Auxiliary Power Plant Fuel System
07-15-2016 - Turbomeca Artouste Airborne Auxiliary Power Plant Overview
07-10-2016 - AEHS Member Kenneth Zetterlund’s Restored R-3350 First Start
07-06-2016 - Book Review: The Focke-Wulf Ta 152, reviewed by Tom Fey
07-04-2016 - Images from RAF Cosford, by Al Charlevois
06-28-2016 - AEHS July 2016 Calendar
06-21-2016 - Allison V-1710 and Rolls-Royce Merlin Torsional Vibration Characteristics (1.3M PDF) --- by Robert J. Raymond and Daniel D. Whitney
06-21-2016 - Pratt & Whitney R-4360, JT3 and JT4 Turbojet Specifications, 1954 (Members Section)
06-20-2016 - Pratt & Whitney R-2800 Specifications, 1939 and 1954 (Members Section)
06-19-2016 - Rolls-Royce Conway Boeing 707 Installation (Members Section)
06-19-2016 - Pratt & Whitney R-2000 and R-2180 Specifications, 1954 and 1949 (Members Section)
06-18-2016 - Pratt & Whitney R-1830 Specifications, 1939 (Members Section)
06-17-2016 - Book Review: Arsenal of Democracy — The American Automobile Industry in World War II, revewed by Carl Kuhns
06-17-2016 - Canadian Pratt & Whitney R-1340 Specifications, 1954 (Members Section)
06-16-2016 - Pratt & Whitney R-1340 Specifications, 1939 (Members Section)
06-15-2016 - Pratt & Whitney R-985 Specifications, 1939 (Members Section)
06-14-2016 - Pratt & Whitney Gasoline Specifications, 1932 (Members Section)
06-04-2016 - Design and Development of Exhaust Valves From the Perspective of Modern Thinking
06-01-2016 - Rolls-Royce Conway Installation in the Handley Page Victor (Members Section)
05-30-2016 - AEHS June 2016 Calendar
05-25-2016 - U.S. Reciprocating Aircraft Engine Acceptance Testing (Members Section)
05-24-2016 - Lockheed MQM-105 Drone Power Plant
05-16-2016 - Rolls-Royce Conway Operation (Members Section)
05-14-2016 - Rolls-Royce Conway Air and Drain Systems (Members Section)
05-14-2016 - U.S. Army Air Service Information Circulars 205, 216, 227, 291 and 293 Added
05-13-2016 - U.S. Army Air Service Information Circulars 48, 60, 66, 118, 118 and 127 Added
05-12-2016 - U.S. Army Air Service Information Circulars 28, 35, 42, 46 and 47 Added
05-12-2016 - Japanese Aircraft Engine Acceptance Testing
05-11-2016 - U.S. Army Air Service Information Circulars 5, 9, 11, 20, 22, 252 and 447 Added
05-09-2016 - Rolls-Royce Conway Starting System (Members Section)
05-05-2016 - Rolls-Royce Conway Oil System (Members Section)
05-04-2016 - Numerous pages updated to work correctly with modern browsers.
05-01-2016 - AEHS 2016 Convention Announcements
04-30-2016 - AEHS May 2016 Calendar
04-27-2016 - Daimler-Benz DB606 Animation by Sergio Pasquali
04-26-2016 - Rolls-Royce Conway Fuel System (Members Section)
04-24-2016 - Rolls-Royce Conway Accessories (Members Section)
04-22-2016 - Rolls-Royce Conway Hot Section (Members Section)
04-20-2016 - Rolls-Royce Conway Compressor (Members Section)
04-18-2016 - The Rolls-Royce Conway, World's First Turbofan
04-10-2016 - Torque Meter Volume 7 Now Available in Digital Form
04-09-2016 - Torque Meter Volume 6 Now Available in Digital Form
04-08-2016 - Torque Meter Volume 5 Now Available in Digital Form
03-31-2016 - AEHS April 2016 Calendar
03-30-2016 - Rare Engine Photos: The Wittber Radial — Australias' Oldest Aero-Engine
03-30-2016 - Rare Engine Photos: The Kelly & Lewis V-8
03-27-2016 - General Motors Research Laboratories X-250: Survivors Section Added
03-23-2016 - Eleven Wings Club Lectures Added to the AEHS Document Collection (Search Source/Publisher field = 'Wings')
03-11-2016 - Daimler-Benz DB 601 Animation (Updated and Exapnded) by Sergio Pasquali
03-06-2016 - Aviodrome: The Netherlands National Aviation Museum
02-29-2016 - AEHS March 2016 Calendar
02-21-2016 - A Study of Engines Exhibited at the 1929 Olympia Aero Show. Members Section, Additional Engine Descriptions and Maintenance Procedures
02-20-2016 - Fiat A14. Members Section, Additional Engine Descriptions and Maintenance Procedures
02-09-2016 - New England Air Museum's Lawrance J-1 Restoration
01-30-2016 - AEHS February 2016 Calendar
01-27-2016 - Aircraft Engines and Strategic Bombing in the First World War, by Todd Martin
01-20-2016 - Book Review: Rotol – The History of an Airscrew Company, 1937 - 1960
01-19-2016 - Reno 2015 (High-Resolution Images in the Members Section)
01-11-2016 - Outstanding Compilation of Horizontally Opposed Aero Engine Information - by Jack Erickson
01-11-2016 - Eagles Mere Air Museum Engines
01-11-2016 - Curtiss 1950 Turbopropeller Brochure, courtesy of Tom Fey
01-04-2016 - Commercial Aircraft and Engine Specifications, 1921 ~ 1931
12-28-2015 - Daimler-Benz DB 601 Animation by Sergio Pasquali
12-21-2015 - Engine Approved Type Certificate List, Nos. 1 ~ 218, 1928 through 1939 (4.5M PDF)
12-12-2015 - U.S. Navy Aeronautical Engine Laboratory Report Index, by Paul Christiansen
10-30-2015 - 1/8 Scale Model of the Whittle WU by John May
09-15-2015 - Video of David Irwin's Merlin 24 Running at the RAF Museum London's 2015 Battle of Britain Celebration
09-09-2015 - Tom Fey's Kiekhaefer 0-45-1 Runs! (Members Section)
09-04-2015 - Tom Fey's Kiekhaefer 0-45-1 Restoration Update (Members Section)
08-24-2015 - General Motors Research Laboratories X-250
08-13-2015 - Bristol Engine Tests at the Royal Aircraft Establishment (web version) --- by Robert J. Raymond
08-12-2015 - Bristol Engine Tests at the Royal Aircraft Establishment (1.5M PDF) --- by Robert J. Raymond
07-02-2015 - Junkers Jumo 205 Animations
06-21-2015 - Allison, Rolls-Royce and Junkers Valve Gear Animations
05-10-2015 - Daimler Benz DB601, DB603, DB605, DB610 Images, Drawings and Specifications (Members Section)
05-03-2015 - de Havilland Contra-Rotating Propeller Pitch Change Animations by Sergio Pasquali
03-27-2015 - Lawrance J-1 CAD Model
03-23-2015 - David Irwin's Merlin Mk500-29 Runs
03-23-2015 - Continental A-Series Engines: The A-50 (Members Section)
03-22-2015 - Lawrance R-1 CAD Model
03-09-2015 - More BMW 803A CAD Models
03-06-2015 - Pratt & Whitney R-4360 Animation
03-01-2015 - New V-12 Firing Order Display (RIP Java!)
01-17-2015 - Aircraft Magnetos
01-04-2015 - Napier Sabre Animations
12-22-2014 - McCulloch Aircraft Engines (Members Section)
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)
07-12-2014 - The BMW 803 Aircraft Engine (Members Section)
06-02-2014 - U.S. National Archives I Navy Bureau of Aeronautics Index
05-13-2014 - An Analysis of the Contra-Rotating Propellers on the 1943 Radioplane OQ-2 Gunnery Target Drone, by Tom Fey
03-19-2014 - Ford's Aircraft Engine (Members Section)
12-16-2013 - The Rolls-Royce Merlin Aero-Engine: Early Development 1933 - 1937
11-11-2013 - How Supersonic Inlets Work, by J. Thomas Anderson
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
09-04-2013 - 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
06-09-2013 - McCook Field's 1918 Propeller Testing Laboratory (Members Section)
04-13-2013 - Fairchild (Ranger) Engines
04-06-2013 - Jacobs Engines
03-25-2013 - Pratt & Whitney R-1830-43 Disassembly, Inspection and Reassembly (Members Section)
03-14-2013 - Turbocharger Development and Production, 1924 - 1945 (Members Section)
02-25-2013 - Inside the de Havilland Gyron Junior, Courtesy of Bruce Vander Mark (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)
09-10-2012 - AEHS Document Collection Catalog (Members Version with Access to Numerous Engine Accessory Manuals)
09-05-2012 - Triptane --- the Super Fuel (Members Section)
11-13-2011 - Napier Sabre Overhaul (Members Section) Public Preview of Napier Sabre Service and Overhaul Tools
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
09-09-2011 - Installation Drawings for 25 Aircraft Engines from 1924
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)
05-28-2011 - Merlin vs Allison: Aircraft Engine Performance Analysis at Rolls-Royce, ca 1940 --- by Robert J. Raymond
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)
02-21-2010 - Manufacturing the Rolls-Royce Merlin (Members Section)
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)
05-21-2008 - Indexes for over 550,000 Air Force Documents
02-06-2006 - Index to Navy ADI(k) Microfilms of German Documents
10-28-2004 - USAF Case History Files Index

... Plus much, much more that is older than two years.
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