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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

Bristol Centaurus and
Curtiss-Wright C18CA
Comparison of Sleeve and Poppet-Valve Aircraft Piston Engines
by Robert J. Raymond

The sleeve-valve versus poppet-valve story is of general interest to aircraft engines enthusiasts, illustrating the difficulty with introducing a major variation into the design of a device already well along in its evolutionary development. Historically such innovations have often been driven by the force of a single personality, which, if given the resources, could take it far beyond what would be achieved if the idea was promoted by a team of dispassionate engineers. Sirs Harry Ricardo and Roy Fedden were two such personalities, without whom the sleeve-valve aircraft engine would probably have never happened.

 
WW2 British Aircraft Production
WW2 British Aircraft Production

Newsreels Related to British Aircraft Production During WW2

 

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.

01-13-2020 - Pratt & Whitney R-1340 3-D Printed Model by Stephen Stanley
01-01-2020 - Napier Lion History
12-14-2019 - A.B.C. Hornet Engine Brochure (Members Section)
12-14-2019 - American Airlines Douglas DC-7 Introduction and Description (Members Section)
12-14-2019 - A.B.C. Scorpion Engine Brochure (Members Section)
12-14-2019 - A.B.C. Scorpion Engine Maintenance and Running Instructions (Members Section)
12-14-2019 - Benz B.4 200 ps Engine Manual (Members Section)
12-14-2019 - Claudel-Hobson Aircraft Carburetters (Members Section)
12-14-2019 - Claudel-Hobson Aircraft Carburetters and Automatic Engine Controls (Members Section)
12-14-2019 - Claudel-Hobson H.C. 8 Carburettor Instructions (Members Section)
12-14-2019 - Claudel-Hobson Carburetters Catalog (Members Section)
12-08-2019 - AEHS Members 2019 Newsletter #4
12-07-2019 - The Hamilton Standard Superhydromatic Propeller, additional material
12-04-2019 - Liberty 12 Crankcase and Engine CAD Renderings
12-04-2019 - Vic Bentley’s Nelson H-59 Restoration
12-03-2019 - Book Review: Westinghouse Aviation Gas Turbine Designs & Studies
12-01-2019 - The Mathis 42-Cylinder Engine
11-30-2019 - McCulloch XO-90-2 Target Drone Engine Qualification Test
11-30-2019 - McCulloch XO-50-2 Target Drone Engine Calibration
11-30-2019 - McCulloch YO-100-4 Calibration and Qualification for Rotorcycle Use
11-30-2019 - McCulloch PN 10609B Starter Tests
11-30-2019 - Kiekhaefer V-105-2 Calibration
11-30-2019 - Kiekhaefer O-45-35 Starting Tests
11-30-2019 - Kiekhaefer KB7ATS Experimental Target Drone Engine Performance and Endurance Tests
11-30-2019 - Kiekhaefer Mercury KB 3-1/2-ST Starter Performance and Endurance Tests
11-27-2019 - Waste Heat Utilization in High Output Aircraft Piston Engines
11-25-2019 - General Dynamics F-16 Hydrazine (H70) Manual (Members Section)
11-20-2019 - Angle’s Engines (Aircat, LeBlond, Rearwin, Ken-Royce, Velie, Lambert and Angle A-1)
11-08-2019 - Identifying Allison V-3420-A8R, AEC Serial Number 173 (2.0 MB PDF)
10-18-2019 - Wright Installation (Members Section)
  Wright Installation Manual, 1939: Section 1 – Front Matter, Table of Contents
  Wright Installation Manual, 1939: Section 1 Chapter 1 – Engine Mounts
  Wright Installation Manual, 1939: Section 1 Chapter 2 – Cowling and Nacelles
  Wright Installation Manual, 1939: Section 1 Chapter 3 – Fuel System
  Wright Installation Manual, 1939: Section 1 Chapter 4 – Lubrication System
  Wright Installation Manual, 1939: Section 1 Chapter 5 – Induction System
  Wright Installation Manual, 1939: Section 1 Chapter 6 – Exhaust System
  Wright Installation Manual, 1939: Section 1 Chapter 7 – Engine Controls
  Wright Installation Manual, 1939: Section 1 Chapter 8 – Ignition System
  Wright Installation Manual, 1939: Section 1 Chapter 9 – Accessories
  Wright Installation Manual, 1939: Section 2 – Installation Inspection and Test
  Wright Installation Manual, 1939: Section 2 Chapter 1 – Installation Inspection
  Wright Installation Manual, 1939: Section 2 Chapter 2 – Test Specification
  Wright Installation Manual, 1939: Section 2 Chapter 3 – Vibration
  Wright Installation Manual, 1939: Section 2 Chapter 4 – Appendix (Accessories, Tables)
10-11-2019 - Wright Installation Manual, 1937 (Members Section)
10-10-2019 - Burlat Moteurs Rotatifs (Members Section)
10-08-2019 - Aeroplane and Motor Car Engine Weight Comparison (Members Section)
10-08-2019 - Aero Motors, Present and Future (Members Section)
09-28-2019 - Liberty 12 Crankshaft, Piston, Connecting Rods, Camshaft, Camshaft Drive and Water Pump Drive CAD Renderings
09-25-2019 - Liberty 12 Intake Manifold CAD Renderings
09-24-2019 - Allison Single and Double V-3420-B Installation Studies
09-15-2019 - Allison V-3420-B Images
09-12-2019 - Allison V-3420-A Images
09-05-2019 - Liberty 12 Fuel Pump CAD Renderings
09-05-2019 - Liberty 12A CAD Rendering by Stephen Stanley
09-05-2019 - Pratt & Whitney R-1340 CAD Rendering by Stephen Stanley
09-03-2019 - AEHS Members 2019 Newsletter #3
08-23-2019 - Liberty 12 Cylinder and Crankcase CAD Renderings
08-20-2019 - The Last Flying Curtiss Turboelectric Propeller - by Tom Fey
08-17-2019 - U.S. Military Aircraft Manual Index
08-16-2019 - U.S. Military Engine Manual Index
08-14-2019 - Liberty 12 CAD Renderings
08-14-2019 - Allison V-1710-G Images
08-13-2019 - Allison V-1710-F Images
08-12-2019 - Allison V-1710-E Images
08-11-2019 - Allison V-1710-D Images
08-10-2019 - Allison V-1710-C Images
08-09-2019 - Allison V-1710-B Images
08-08-2019 - Allison GV-1710-A Images
08-07-2019 - Allison Piston Engine Specifications
07-14-2019 - Siddeley Puma 240 hp Technical Notes (Members Section)
07-14-2019 - R.A.F. 3a 200 hp Technical Notes (Members Section)
07-14-2019 - R.A.F. 1a 90 hp Technical Notes (Members Section)
07-14-2019 - Gnome 100 hp Monosoupape Technical Notes (Members Section)
07-14-2019 - Le Rhone 80 hp Technical Notes (Members Section)
07-14-2019 - Gnome 80 hp Technical Notes (Members Section)
07-14-2019 - Clerget 110 hp Technical Notes (Members Section)
07-14-2019 - Beardmore 120 hp Technical Notes (Members Section)
07-01-2019 - Tom Fey’s Righter O-15-3 Restoration
07-01-2019 - Pratt & Whitney Gasoline and Engine Specifications (Members Section)
   Updated to include:
     Specification No. 8116, Double Wasp CA5 (R-2800)
     Specification No. 8117, Double Wasp CA17 (R-2800)
     Specification No. 8125, Double Wasp CA19 (R-2800)
     Specification No. 7029, Wasp Major VSB11-G (R-4360)
     Specification No. 7052, Wasp Major TSB3-G (R-4360)
06-25-2019 - Examinations of Cadet Officer Frank Whittle’s 1928 Paper Dispute that it is the First Mention of Jet Propulsion
06-18-2019 - Book Review: Studebaker’s XH-9350
06-18-2019 - Book Review: America’s Round-Engine Airliners
06-07-2019 - Pratt & Whitney Gasoline and Engine Specifications (Members Section)
   Updated to include:
     Specification No. 2039, Wasp Jr B4 (R-985)
     Specification No. 2040, Wasp Jr B5 (R-985)
     Specification No. 1052, Wasp S3H (R-1340)
     Specification No. 1053, Wasp S3H1-G (R-1340)
     Specification No. 1055, Wasp S3H2 (R-1340)
     Specification No. 1056, Wasp S1H1 (R-1340)
     Specification No. 1058, Wasp S1H1-G (R-1340)
     Specification No. 5054, Twin Wasp S1C3-G (R-2000)
     Specification No. 9027, Twin Wasp 2SD13-G (R-2000)
     Specification No. 9030, Twin Wasp E5 (R-2000)
     Specification No. 6051, Twin Wasp E1 (R-2180)
06-04-2019 - AEHS Members 2019 Newsletter #2
05-12-2019 - AN-9506. Specification, Ends, Aircraft Engine Nose and Propeller Shaft (Members Section)
05-10-2019 - Continental A-40 50-hr Endurance Test (Members Section)
05-10-2019 - Pratt & Whitney Installation: Wasp Jr (R-985) B4, B5 (Members Section)
05-10-2019 - Pratt & Whitney Installation: Wasp (R-1340) S3H1, S3H1-G, S3H2 (Members Section)
05-10-2019 - Pratt & Whitney Installation: Twin Wasp (R-1830) S1C3-G (Members Section)
05-10-2019 - Pratt & Whitney Installation: Twin Wasp (R-2000) 2SD13-G, D2 (Members Section)
05-10-2019 - Pratt & Whitney Installation: Double Wasp (R-2800) CA Series (Members Section)
05-10-2019 - Pratt & Whitney Installation: Double Wasp (R-2800) CB Series (Members Section)
05-10-2019 - Pratt & Whitney Installation: Wasp Major (R-4360) B Series (Members Section)
05-07-2019 - Pratt & Whitney Installation: Lubrication System (Members Section)
05-07-2019 - Pratt & Whitney Installation: Fuel System (Members Section)
05-07-2019 - Pratt & Whitney Installation: Electrical System (Members Section)
05-07-2019 - Pratt & Whitney Installation: Inspection (Members Section)
05-07-2019 - Pratt & Whitney Installation: Instrumentation, Operation, Test (Members Section)
05-07-2019 - Pratt & Whitney Installation: Power Analysis and Performance (Members Section)
05-07-2019 - Pratt & Whitney Installation: References (Members Section)
04-09-2019 - Lycoming Lubricating Oil Specification 301-C (Members Section)
04-09-2019 - Lycoming Aviation Gasoline Specification 201-D (Members Section)
04-09-2019 - Lycoming R-680-E3A Model Specification 1047-C (Members Section)
04-09-2019 - Lycoming O-435, O-435-A Model Specification 1065-A (Members Section)
04-09-2019 - Lycoming O-350, O-350-A Model Specification 1063-A (Members Section)
04-09-2019 - Lycoming O-290, O-290-A Model Specification 1061-A (Members Section)
04-09-2019 - Lycoming O-235, O-235-A Model Specification 1059-B (Members Section)
04-09-2019 - Lycoming GO-145-C3, -C4 Model Specification 1046-C (Members Section)
04-09-2019 - Lycoming GO-145-C2 Model Specification 1045-C (Members Section)
04-09-2019 - Lycoming GO-145-C1 Model Specification 1044-B (Members Section)
04-06-2019 - Lycoming O-145-C3, -C4 Model Specification 1029-C (Members Section)
04-06-2019 - Lycoming O-145-C2 Model Specification 1028-C (Members Section)
04-06-2019 - Lycoming O-145-C1 Model Specification 1027-B (Members Section)
04-06-2019 - Lycoming O-145-B3, -B4 Model Specification 1036-B (Members Section)
04-06-2019 - Lycoming O-145-B2 Model Specification 1035-B (Members Section)
04-06-2019 - Lycoming O-145-B1 Spec No. 1034-A (Members Section)
04-06-2019 - Lycoming O-145-A3, -A4 Spec No. 1020-D (Members Section)
04-06-2019 - Lycoming O-145-A2 Spec No. 1026-D (Members Section)
04-06-2019 - Lycoming O-145-A1 Model Specification 1029-D (Members Section)
04-05-2019 - Specified and Alternate Grade Fuels for Aircraft and Engine Combinations (Members Section)
04-05-2019 - Alternate Grade Fuels in Aircraft Engines (Members Section)
04-03-2019 - Harold Caminez, Engine Designer
03-29-2019 - Book Review: Early Westinghouse Axial Turbojets, by Paul J. Christiansen
03-27-2019 - Twin Wasp D (R-2000) Model Differences (2.4M PDF). Courtesy of Wings Over the Rockies Museum and James Tegart
03-26-2019 - Ford-Built R-4360s
03-15-2019 - Allison V-3420 and DV-6840 Engine Arrangements (Members Section)
03-08-2019 - Alfaro Engine Technical Development Report 4 (Members Section)
03-08-2019 - Alfaro Engine Technical Development Report 19 (Members Section)
03-08-2019 - Alexander Motor Prize Competition, 1911 (Members Section)
03-08-2019 - British Advisory Committee for Aeronautics Interim Report, 1910 - 1911 (Members Section)
03-08-2019 - Aero-Engine Efficiencies, by A.H. Gibson (Members Section)
03-01-2019 - 1/8 Scale Fiat AS.6, by John May
03-01-2019 - AEHS Members 2019 Newsletter #1
02-22-2019 - Reno 2018 (High-Resolution Images in the Members Section)
02-10-2019 - Alistair Wright’s time in the Rolls-Royce Derby Special Projects Office; the Rolls-Royce Conway
02-05-2019 - Sperry Engine Analyzer with with Operating Instructions for Pratt & Whitney R-2800 (Members Section)
02-04-2019 - The S.U. Petrol Injection Pump (Members Section)
02-04-2019 - Napier Sabre VA Pilot’s Notes (Members Section)
02-04-2019 - Royal Aircraft Establishment Work on Air-Cooled Cylinders (Members Section)
02-04-2019 - Bristol Sleeve Valve Aero Engine Brochure (Members Section)
02-04-2019 - British High-Speed Aircraft for the 1931 Schneider Trophy Contest (Members Section)
02-04-2019 - British High-Speed Aircraft for the 1927 Schneider Trophy Contest (Members Section)
02-04-2019 - Napier Sabre IIA, IIB Pilot’s Notes (Members Section)
02-04-2019 - The S.U. Injection Pump (Members Section)
02-03-2019 - Oldsmobile and the Rolls-Royce Merlin Engine (Members Section)
02-03-2019 - Rolls-Royce Merlin Pocket Folio of Dismantling, Erecting and Repair Notes (Members Section)
02-03-2019 - Rolls-Royce Merlin Folio of Design, Installation, Running and Maintenance Notes (Members Section)
02-03-2019 - Rolls-Royce Merlin II, III, IV Pilot’s Notes (Members Section)
02-03-2019 - The Rolls-Royce Merlin 500 as Fitted to York Aircraft (Members Section)
02-03-2019 - Bristol Mercury XV Pilot’s Notes (Members Section)
02-03-2019 - Junkers Jumo 211B/D, G/H Brochure (Members Section)
02-03-2019 - Junkers Jumo 211B, D Brochure (Members Section)
02-03-2019 - Junkers Jumo 211A Brochure (Members Section)
02-03-2019 - Junkers Jumo 205 Brochure (Members Section)
01-18-2019 - Radioplane US AAF OQ-3, Navy TDD-2 Radio Controlled Airplane Target Instructions and Parts Catalog (Members Section)
01-18-2019 - Radioplane US AAF OQ-14, Navy TDD-3 Radio Controlled Airplane Target Instructions and Parts Catalog (Members Section)
01-18-2019 - McCulloch O-100-1 Engine Overhaul Manual (Members Section)
01-18-2019 - Righter 2-GS-17 Series 41 and 42 Engine Specification (Members Section)
01-18-2019 - Righter O-15-1 Engine Operation and Maintenance Instructions (Members Section)
01-01-2019 - Bristol Centaurus V, VII, IX, XI Operating Instructions (Members Section)
01-01-2019 - Tampier Rotary Engine Carburetor Carburetor Blocktube Parts Catalog (Members Section)
01-01-2019 - Tampier Rotary Engine Carburetor Carburetor Blocktube Description (Members Section)
01-01-2019 - Bristol Sleeve-Valve Aero Engine Brochure (Members Section)
01-01-2019 - Bristol Sleeve-Valve Engine Reference Data (Members Section)
01-01-2019 - Bristol Orpheus Description (Members Section)
01-01-2019 - Armstrong Siddeley Aircraft Engines (Members Section)
01-01-2019 - Bristol Siddeley Double Mamba Mk.112 Performance and Installation Data (Members Section)
01-01-2019 - Bristol Theseus, Proteus Description, Performance (Members Section)
12-21-2018 - Bentley BR.1 Cylinder Images
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 Members 2018 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 Members 2018 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 Members 2018 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 Members 2018 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
12-01-2017 - 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)
11-09-2017 - Propeller and Governor Application List (Members Section)
09-22-2017 - The Evolution of Crankshaft Design in High Output In-Line Aircraft Piston Engines --- by Robert J. Raymond
07-19-2017 - Book Review: Hucknall –the Rolls-Royce Flight Test Establishment, by David Birch
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
06-07-2017 - Hamilton Standard Propellers (Members Section)
04-19-2017 - U.S. Reciprocating Aircraft Engine General Specifications and Testing (AN-9500D, AN-9502D) (Members Section)
06-21-2016 - Allison V-1710 and Rolls-Royce Merlin Torsional Vibration Characteristics (1.3M PDF) --- by Robert J. Raymond and Daniel D. Whitney
01-11-2016 - Outstanding Compilation of Horizontally Opposed Aero Engine Information - by Jack Erickson
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
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)
08-17-2013 - Aircraft Carburetors and Fuel Systems
02-18-2013 - The Packard Variable Speed Drive, by Jerry Wells
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)
09-09-2011 - 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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