02-15-2026 - The Rolls-Royce Vulture
02-15-2026 - Early U.S. Navy Afterburner Development Efforts: Part 2b: Solar Aircraft Company – Production Design and Development
01-29-2026 - Early U.S. Navy Afterburner Development Efforts: Part 2a: Solar Aircraft Company – Early Design and Development
01-25-2026 - Mysteries of the Convair B-36 Propeller: Part 2
01-11-2026 - Claudel-Hobson Types A.V.48-D and A.H.45-D Carburetters (Members' Section)
01-11-2026 - Claudel-Hobson Series Type A.I.48 Carburettor (Members' Section)
01-10-2026 - Bristol Hercules 1,000 hrs Between Overhauls (Members' Section)
01-09-2026 - Aeroproducts Model A642-G805 Propeller Parts Catalog (used on Douglas AD-4)
01-09-2026 - Aeroproducts Model AD86641FN-B3 Contra-Rotating Propeller Parts Catalog (used on Convair R3Y, XP5Y)
01-08-2026 - Aeroproducts Model A5422B-1, B-2 Parts Catalog (used on North American P-51H)
01-08-2026 - Aeroproducts Model A422F Series Brochure (used on Beechcraft C-45G)
01-07-2026 - ADC Nimbus 300/330hp Engine Care and Maintenance (Members' Section)
01-04-2026 - Selected Pratt & Whitney Engine Cutaways and Data
01-04-2026 - Gnome 100 hp Monosoupape Rotary Engine CAD Animation by Glen Netherwood
01-01-2026 - Charles E. Taylor Interview (Members' Section)
12-27-2025 - Early U.S. Navy Afterburner Development Efforts – Part 1: Ryan Aeronautical
12-27-2025 - Book Review: I'm Not the Only Idiot in the Cockpit
12-08-2025 - Rolls-Royce Derwent Mk.1
12-01-2025 - AEHS Members 2024 Newsletter #4
11-23-2025 - Lockheed Tooling Advances (SAE Manufacturing and Engineeering Forum Held January 27, 1955) (Members' Section)
11-23-2025 - Intake Manifold Temperatures and Fuel Economy (Members' Section)
11-23-2025 - Bristol Jupiter Series VI Installation, Running and Maintenance Notes (Members' Section)
11-23-2025 - Wright Cyclone Combustion (Members' Section)
11-20-2025 - Wright (Lawrance) J-1 Service Handbook Donated by Robert Reid (Members' Section)
11-15-2025 - Continental XO-1430 Development, Part 14: 1940 and Conclusion
11-05-2025 - Continental XO-1430 Development, Part 13: 1 Jul 1939 to 31 Dec 1939
11-01-2025 - AEHS Video # 10: Restoring and Running the Continental IV-1430 Hyper Engine, by Tom Fey
11-01-2025 - Continental XO-1430 Development, Part 12: 1 Jan 1939 to 30 Jun 1939
10-23-2025 - Bantam 3.5 Twin Restoration, by Tom Fey
10-17-2025 - Continental XO-1430 Development, Part 11: 1938
10-15-2025 - Wright P-2C CAD Model Complete-Engine Views, by John Riend
10-07-2025 - Continental XO-1430 Development, Part 10: 1 Jul 1937 to 31 Dec 1937
10-02-2025 - Continental XO-1430 Development, Part 9: 1 Jan 1937 to 30 Jun 1937
10-02-2025 - Wright P-2B CAD Model Complete-Engine Views, by John Riend
09-25-2025 - Wright P-2A CAD Model Complete-Engine Views, by John Riend
09-19-2025 - Continental XO-1430 Development, Part 8: 1 Jul 1936 to 31 Dec 1936
09-08-2025 - Mysteries of the Convair B-36 Propeller: Part 1
09-08-2025 - Continental XO-1430 Development, Part 7: 1 Jan 1936 to 30 Jun 1936
09-06-2025 - Solent Sky Museum - Southampton, UK, by John Northall
09-06-2025 - Stow Maries Great War Aerodrome - Essex, UK, by John Northall
09-01-2025 - AEHS Members 2025 Newsletter #3
08-28-2025 - Continental XO-1430 Development, Part 6: 1 Jul 1935 to 31 Dec 1935
08-23-2025 - Continental XO-1430 Development, Part 5: 1 Jan 1935 to 30 Jun 1935
08-19-2025 - Continental XO-1430 Development, Part 4: 1 Jul 1934 to 31 Dec 1934
08-13-2025 - Continental XO-1430 Development, Part 3: 1 Jan 1934 to 30 Jun 1934
08-06-2025 - AEHS Video # 9 — European Contra-Rotating Propfan Engines
08-03-2025 - Continental XO-1430 Development, Part 2: 1932 and 1933
07-28-2025 - Continental XO-1430 Development, Part 1: Introduction and Background
07-20-2025 - Salmson Type 18 CMb - 520 CV Engine Technical Notice (Members Section)
07-03-2025 - Air Zoo Aerospace & Science Experience
07-02-2025 - The Pratt & Whitney R-2060 "Yellow Jacket"
06-23-2025 - Lockheed Model 89 Report No. 4916. Turbosupercharger Specification
06-21-2025 - Lockheed Model 89 Turbosupercharger Comparison
06-18-2025 - Lockheed Model 89 General Electric Turbosupercharger Specification
06-17-2025 - Lockheed Model 89 Turbosupercharger Design
06-16-2025 - Lycoming XR-7755 Development: Contracts/Administrative Chronology, 1948
06-12-2025 - Lockheed Model 89 Turbosupercharger Trade Studies
06-07-2025 - Aircraft Disposal Company (A.D.C) Cirrus Engine Installation, Operation and Maintenance Manual (Members Section)
06-07-2025 - Bristol Cherub Series III Engine Installation, Operation and Maintenance Manual (Members Section)
06-07-2025 - Pobjoy R-Type Engine Installation and Maintenance Notes (Members Section)
06-07-2025 - Bristol Sleeve-Valve Engine Cylinder Flow Test (Members Section)
06-07-2025 - Lycoming XR-7755 Development: Contracts/Administrative Chronology, 1947
06-01-2025 - AEHS Members 2025 Newsletter #2
05-28-2025 - Lycoming XR-7755 Development: Contracts/Administrative Chronology, 1946
05-26-2025 - Lycoming XR-7755 Development: Contracts/Administrative Chronology, 1945
05-23-2025 - Apollo Statistics
05-23-2025 - Lycoming XR-7755 Development: Contracts/Administrative Chronology, 1944
05-21-2025 - Lycoming XR-7755 Development: Contracts/Administrative Chronology, 1943
05-09-2025 - Space Shuttle Main Engine (RS-25) Orientation
04-20-2025 - New Video Feature
04-18-2025 - Pratt & Whitney Aircraft Wasp Major Development History
04-06-2024 - Szekeley Engine and Aircraft Documents Added to the AEHS Document Collection Catalog
04-05-2025 - Bristol Jupiter VIII F., VIII F.P., XI F. and XI F.P. Exhaust and Ignition Systems
04-03-2025 - Bristol Jupiter VIII F., VIII F.P., XI F. and XI F.P. Induction System
04-01-2025 - Bristol Jupiter VIII F., VIII F.P., XI F. and XI F.P. Lubrication System
03-31-2025 - Naming “Cyclone”, Why and When
03-26-2025 - Bristol Jupiter VIII F., VIII F.P., XI F. and XI F.P. Specifications, Description
03-24-2025 - AEHS Video # 8 — The Radio-Controlled Arial Gunnary Targets of WWII
03-14-2025 - Bristol Jupiter IV Ignition, Gas Starter, Exhaust Collector
03-10-2025 - Bristol Jupiter IV Induction, Lubrication
03-08-2025 - Bristol Jupiter IV Specifications, Description
03-07-2025 - Christie V-8 Aircraft Engine of 1909-1910
03-01-2025 - AEHS Members 2025 Newsletter #1
02-13-2025 - Bristol Pegasus II.L and II.M Aero Engine: Automatic Throttle Control and Starter
02-12-2025 - Bristol Pegasus II.L and II.M Aero Engine: Magneto and Carbuettor
02-10-2025 - Wright P-2 CAD Model Additions, by John Riend
02-09-2025 - Bristol Pegasus II.L and II.M Aero Engine: Accessories
02-06-2025 - Bristol Pegasus II.L and II.M Aero Engine: Supercharger, Lubrication
02-04-2025 - New Video Feature
02-02-2025 - Bristol Pegasus II.L and II.M Aero Engine: Description
01-30-2025 - German WWII Homogeneous Charge Compression Ignition (HCCI) Engine Research, by Calum Douglas (2.9M PDF)
01-29-2025 - Bristol Pegasus II.L and II.M Aero Engine: Specifications
01-26-2025 - New Video Features
01-26-2025 - Book Review: Over the Wing, by William F. Chana
01-12-2025 - Armstrong Siddeley Viper Starting System
01-11-2025 - Armstrong Siddeley Viper Air System
01-10-2025 - Armstrong Siddeley Viper Lubrication System
01-09-2025 - Armstrong Siddeley Viper Fuel System
01-08-2025 - Armstrong Siddeley Lynx IV and de Havilland Gipsy Three Dataplates, courtesy of Robert Morgan
01-08-2025 - Armstrong Siddeley Viper Description
01-01-2025 - AEHS Video, the Curtiss-Wright Turbo-Compound Power Recovery Turbine (PRT), by Tom Fey
12-21-2024 - Armstrong Siddeley Panther IIA: Part 3: Induction, Ignition and Lubrication
12-20-2024 - Armstrong Siddeley Panther IIA: Part 2: Auxiliary Section
12-18-2024 - Armstrong Siddeley Panther IIA: Part 1: Power Section
12-01-2024 - Lycoming XR-7755 Development
    3 Mar 1944 — Study of Power Required per Cylinder
    11 Sep 1945 — Engine / Turbosupercharger Characteristics Comparison
    January 1946 — XR-7755 Contract Summary
    3 Dec 1946 — XR-7755 Performance on Various Fuels
12-01-2024 - AEHS Members 2024 Newsletter #4
11-19-2024 - 3 Dec 1946 — Lycoming XR-7755 Verification Test Reports
11-18-2024 - 15 Jul 1947 — Lycoming XR-7755 Development Direct Injection Calibration
    1 Oct 1947 — Fire in the Test Cell
    15 Oct 1947 — September 1947 Status Report
    29 Jan 1948 — Testing Schedule and Results
    18 Nov 1948 — The XR-7755 is Still Far from Reliable
11-14-2024 - 1 Dec 1946 — Lycoming XR-7755 Hours Run During 1946
11-13-2024 - Dec 1946 - Jan 1947 — Lycoming XR-7755 Performance Compared to Turboprops in Development
11-12-2024 - Book Review: L-15 Scout: Boeing's Smallest Airplane, by Mal Holcomb
11-08-2024 - Book Review: Westinghouse J34 Axial Turbojet Family: Development History and Technical Profiles, by Paul J. Christiansen
10-18-2024 - CAD Images by Stephen Stanley: Curtiss R-600 Challenger; Velie M-5
10-07-2024 - 1 Jan 1945 — Lycoming XR-7755 Engine Mount Studies
10-07-2024 - Lycoming XR-7755-1 Engine Specification No. 2020-C; Installation Drawing No. 80005; Power Curve No. 3985
10-02-2024 - Lycoming XR-7755: 19 Apr 1948 – First 50-hr Test at 5,000 hp
10-02-2024 - Lycoming XR-7733 Specifications, Installation Drawings and Power Curves:
    5 Jul 1943 — Lycoming X-6 Engine Specification No. 2020
    30 Jun 1944 — Lycoming X-7 Engine Preliminary Specification; Installation Drawing No. 80001
    4 Jun 1945 — Lycoming XR-7755-3 Engine Specification No. 2031-A; Installation Drawing No. 80004; Power Curve No. 5714
    29 Nov 1945 — Lycoming XR-7755-5 Engine Specification No. 2030-B; Installation Drawing No. 80006
    7 Feb 1955 — Military Specification MIL-E-25109, Engines, Aircraft, Reciprocation, General Specification For (supersedes AN-9500d dated 23 Sep 1948)
10-01-2024 - Wright P-1 CAD Model: Crankcase Rear Section, Oil System, by John Riend
10-01-2024 - The Lighter Than Air Era, by Sergio Pasquali (Italian Language)
09-27-2024 - Lycoming XR-7755 Article Update
09-07-2024 - Lycoming XR-7755 Article Update
09-05-2024 - Lycoming XR-7755 Article Update
09-04-2024 - Lycoming XR-7755 Article Update
09-03-2024 - Lycoming XR-7755 Article Update
09-01-2024 - AEHS Members 2024 Newsletter #3
08-31-2024 - Lycoming XR-7755 Article Update
08-30-2024 - Lycoming XR-7755 Article Update
08-27-2024 - Lycoming XR-7755 Article Update
08-24-2024 - Lycoming XR-7755 Article Update
08-20-2024 - Lycoming XR-7755 Article Update
08-09-2024 - Lycoming XR-7755 Article Update
08-07-2024 - Lycoming XR-7755 Article Update
08-03-2024 - Lycoming XR-7755 Article Update
08-01-2024 - The Lycoming XR-7755
07-11-2024 - The McKinnon Jet Goose (updated)
07-10-2024 - Curtiss-Wright Cyclone 22 (Military XR-4090)
07-01-2024 - Allison V-3420-9 Type Test
06-17-2024 - Stromberg NA-S4 Carburetor Development—Part 4: Testing on the Lawrance J-1
06-16-2024 - Stromberg NA-S4 Carburetor Development—Part 3: The Fixes
06-14-2024 - Programs for all AEHS Conventions Added (Members' Section)
06-07-2024 - YouTube video of Tom Fey’s OS FS-20 Running
06-06-2024 - Stromberg NA-S4 Carburetor Development—Part 2: Testing on the Lawrance L-4
06-05-2024 - Stromberg NA-S4 Carburetor Development—Part 1: Description
06-04-2024 - Wright J-5A 100-hour Full-Throttle Endurance Test
06-03-2024 - Wright J-4A Endurance Tests
06-02-2024 - Wright J-3 50-hour Test
06-01-2024 - AEHS Members 2024 Newsletter #2
05-22-2024 - Curtiss V-1400 R3C-2 Schneider Cup Racing Engine
05-15-2024 - Instructing in the T-6
05-14-2024 - The McKinnon Jet Goose
05-12-2024 - WWII Bomber Operations from a British Perspective
05-01-2024 - Wright P-1 CAD Model, Complete Assembly, Front Section, by John Riend
04-19-2024 - Wright P-1 CAD Model, Valve Train, by John Riend
04-16-2024 - Ad Astra per Aspera (To the Stars Through Hardships), by Terry Spath
04-12-2024 - U.S. Military Engine Development, updated with Lycoming XR-7755 and Studebaker XH-9350 data.
04-11-2024 - Wright P-1 CAD Model, Starter, by John Riend
04-09-2024 - U.S. Military Experimental Engine Development, 1935 – 1947
04-06-2024 - Tom Fey’s OS FS-20 Restoration
04-06-2024 - Wright P-1 CAD Model, Gear Trains, by John Riend
03-30-2024 - Wright P-1 CAD Model, Partial Assembly, by John Riend
03-27-2024 - Allison V-3420-A8R, AEC Serial Number 173 Restored
03-18-2024 - Wright P-1 CAD Model, Cylinder, by John Riend
03-07-2024 - Wright P-1 CAD Model, new castings added, by John Riend
03-05-2024 - NMUSAF Rocket Tour Docent Training, by Jeff Robeson (2.0M PDF)
03-04-2024 - NMUSAF Piston Engine Tour Docent Training, by Jeff Robeson (2.8M PDF)
03-01-2024 - Book Review: Building Engines for War by Edward M. Young
03-01-2024 - Wright P-1 CAD Model, by John Riend
03-01-2024 - AEHS Members 2024 Newsletter #1
02-23-2024 - The USAAF Compound Engine Project
02-13-2023 - Bonus Reno 2023 Gallery (Members Section)
02-10-2023 - Reno 2023
02-06-2024 - Wright R-2 Drawings (Members Section)
02-05-2024 - Additions to Wright P-2 CAD Model, by John Riend
02-01-2024 - It Sounded Like a Good Idea at the Time: Canadian Car and Foundry HI-4800 3,000 hp Diesel Oil Engine, Updated (Members Section)
01-30-2024 - A Wolseley Motor That "Never Was" – The Hispano-Suiza 'Viper' W-12 Aero-Engine, by Jerry Wells
01-28-2024 - New Features and Videos
01-28-2024 - Wright P-2 CAD Model, by John Riend
01-27-2024 - It Sounded Like a Good Idea at the Time: Canadian Car and Foundry HI-4800 3,000 hp Diesel Oil Engine (Members Section)
01-18-2024 - Book Review: The History of North American Small Gas Turbine Aircraft Engines
01-09-2024 - Book Review: Rolls-Royce and the Mustang
01-07-2024 - It Sounded Like a Good Idea at the Time: Variable Discharge Turbosupercharger Engine (VDT) (Members Section)
01-05-2024 - Additions to Wright J-5C CAD Model by John Riend
01-01-2024 - Kinner Aircraft Engines
01-01-2024 - Additions to Wright J-5C CAD Model by John Riend
10-31-2023 - Boeing Gas Turbines
10-23-2023 - The Northrop Turbodyne (XT37) Turboprop
10-06-2023 - Maintaining the Aeroproducts Model 606 Propellers, by Tony Vasko
09-09-2023 - The Aeroproducts Models A6441FN-606 and A6441FN-606A Propellers
09-08-2023 - Mysteries of the Convair B-36 Propeller: Part 1
01-17-2023 - Reno 2022
02-09-2022 - Reno 2021
10-06-2020 - U.S. WWII Engine Production
10-06-2020 - U.S. WWII Propeller Production
10-01-2020 - Turbosupercharger Control Systems: Part 1 — Oil Pressure Powered
10-01-2020 - Turbosupercharger Control Systems: Part 2 — Electronic
10-01-2021 - Manned U.S. Rocket Propulsion – V-2 to Moon Landing
08-17-2019 - U.S. Military Aircraft Manual Index
08-16-2019 - U.S. Military Engine Manual Index
11-13-2018 - Studebaker XH-9350 Aircraft Engine
11-04-2018 - A German Assessment of the Allison V-1710 Aircraft Engine
09-01-2018 - Packard-Built V-1650, Rolls-Royce Merlin XXVII Engineering Information
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 - Jacobs L-4, L-5, L-6 Series Specifications, Data, Installation Drawings (Members Section)
05-24-2018 - Propeller Shaft Dimensions
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
01-31-2018 - Pratt & Whitney R-4360 Valve Train Development
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
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
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 - 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)
05-21-2008 - 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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