AEHS Home

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Seeing the future by searching the past Securing the future by saving the past -- Alex PongThe 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.For a limited time, AEHS Members get a big discount on the new book American Sleeve-Valve Aircraft Engines- More -George J. Mead (left) andFrederick B. Rentschler (Right)with the Pratt Whitney Wasp .While Wright Aeronautical is credited with producing the first reliable air cooled engine, Pratt Whitney Aircraft Co. gets credit for producing the first reliable air cooled engine with enough power for viable commercial designs, the Pratt Whitney Wasp . Founded in 1925 by the former President and Chief Engineer of Wright Aeronautical, Pratt Whitney continues to produce world-class aircraft engines as a division of United Technologies Corporation.- more -Torque MeterJournal of the Aircraft Engine Historical SocietyFor 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!In order to conserve bandwidth, many images and references provided by the Aircraft Engine Historical Society require the use of Portable Data Format (.pdf) and Tagged Image Format (.tif) file readers. Readers for these file formats can be downloaded free of charge by clicking on the icons below.The AEHS Needs Your Help!Please help the Aircraft Engine Historical Society achieve its mission. We need donations (click here to donate) and we need material for publication on this web site. If you wish to contribute material, you can find submission guidelines here.Please feel free to contact us about your article ideas.Webmasters: Please feel free to link to this page of the AEHS site. Other pages may change and should not be linked.Change HistoryListed 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.09-01-2020 - Pratt Whitney Engine Operation Information LettersNo. 26: Emergency Use of Prime During Icing Conditions (Members Section)No. 27: Water Injection (Members Section)No. 28: Double Wasp CB Mixture Settings at Maximum Continuous Power (Members Section)No. 29: Carburetor Preheat Use Before Takeoff (Members Section)No. 30: PWA Operating Instructions for Military R-985 Models (Members Section)No. 31: Cruise Spark Advance (Members Section)No. 32: Effect of Fuel Grade on Engine Performance (Members Section)No. 33: Overboost Limits (Members Section)09-01-2020 - WWII Lorin Ramjet Experiments09-01-2020 - Wright P-1 CAD Rendering, by Stephen Stanley09-01-2020 - Interview with Charles E. Taylor09-01-2020 - AEHS Members 2020 Newsletter #308-01-2020 - Pratt Whitney Engine Operation Information LettersNo. 13: Engine Overspeeding (Members Section)No. 14: Checking Propellers after Reverse Pitch Operation; Firewall Shutoff Valve Operation (Members Section)No. 15: Fuel Boost Pump Use (Members Section)No. 16: Double Wasp CA Power Loss in Moist Air (Members Section)No. 17: Mixture Strength Effect on Cylinder Head Temperature and Horsepower (Members Section)No. 18: Idle Mixture Setting (Members Section)No. 19: Detonation and Preignition (Members Section)No. 20: Full Takeoff Power Use (Members Section)No. 20a: Engine Rating, Limits and Power Control (Members Section)No. 21: Transport Carburetor Setting (Members Section)No. 21a: Cruise Mixture Setting Using Torque Pressure Drop (Members Section)No. 22: Manifold Pressure versus RPM at Part Throttle (Members Section)No. 23: Extinguishing Blower Fires During Starting (Members Section)No. 24: Prestart Engine Procedure (Members Section)No. 25: Minimum Manifold Pressure (Members Section)08-01-2020 - Hamilton Standard Variable Camber Propellers07-17-2020 - American Sleeve Valve Aircraft Engines Special Offer07-09-2020 - 1942 Curtiss-Wright Promotional Video07-06-2020 - Pratt Whitney Engine Operation Information LettersNo. 1: Carburetor Air Temperature Measurement on Single-Row Engines (Members Section)No. 2: Fuel Pressure Limits with Pressure Injection Carburetors (Members Section)No. 3: Wasp Mag Check; Twin Wasp CHT Limits; Wasp Major Torquemeter Constants (Members Section)No. 4: Icing with Float Type Carburetors (Members Section)No. 5: Practice Feathering and Unfeathering Procedures (Members Section)No. 6: Reverse Pitch Propeller Operation (Members Section)No. 7: Runaway Propeller Procedure (Members Section)No. 8: High-Blower Takeoff Carb Air Temp Limits (Members Section)No. 9: Commercial Engine Rating Definitions (Members Section)No. 10: Preflight Power Checking (Members Section)No. 11: Magneto Check During Flight (Members Section)07-06-2020 - Pratt & Whitney Double Wasp Description Added07-06-2020 - Pratt & Whitney Wasp Major Description Added07-03-2020 - Renault 80hp Engine Instruction (Members Section)07-03-2020 - Renault 150hp Engine Instruction (Members Section)06-13-2020 - German WWI Engine Factories (French Report) (Members Section)06-13-2020 - German WWI Propeller Factories (French Report) (Members Section)06-13-2020 - German WWI Engine Development (French Report) (Members Section)06-13-2020 - German WWI Hiero 200, 230 hp Engines (French Report) (Members Section)06-13-2020 - German WWI Basse and Selve 300 hp Engines (French Report) (Members Section)06-13-2020 - German WWI Benz 575-675 hp Engines (French Report) (Members Section)06-13-2020 - German WWI Variable-Pitch Propellers (French Report) (Members Section)06-08-2020 - Rolls-Royce Vulture II and IV Description (Members Section)06-08-2020 - Grumman Ranger Widgeon06-07-2020 - Pratt Whitney Twin Wasp E (R-2180) Description06-02-2020 - Pratt Whitney Twin Wasp D (R-2000) Description06-02-2020 - AEHS Members 2020 Newsletter #205-11-2020 - Wright Cyclone Engine Brochure (R-1750), 1928 (Members Section)05-11-2020 - Wright Cyclone Engine Brochure (R-1750), 1930 (Members Section)05-11-2020 - Wright Cyclone Engine Brochure (R-1820), 1930 (Members Section)05-11-2020 - Wright Cyclone Engine Brochure (R-1820), 1933 (Members Section)05-11-2020 - Wright F-50 Series Cyclone Engine Brochure (R-1820), 1935 (Members Section)05-11-2020 - Wright G Series Cyclone Engine Brochure (R-1820), 1936 (Members Section)05-11-2020 - Wright G-100 Series Cyclone Engine Brochure (R-1820), 1938 (Members Section)05-11-2020 - Wright G-200 Series Cyclone Engine Brochure (R-1820), 1939 (Members Section)05-11-2020 - Wright Cyclone Powered Aircraft, 1937 (Members Section)05-11-2020 - Wright Whirlwind and Cyclone Airline Service, 1938 (Members Section)05-11-2020 - Wright Cyclone (R-1820-F) Serial Numbers, 1935 (Members Section)05-11-2020 - Wright Cyclone C9GC Serial Numbers, 1953 (Members Section)05-11-2020 - Wright Cyclone 9HE Serial Numbers, 1949 (Members Section)05-11-2020 - Wright Cyclone R-1750 Serial Numbers, 1931 (Members Section)05-08-2020 - Pratt Whitney Hornet B Description05-06-2020 - Pratt Whitney Hornet A, C, D, E Description04-24-2020 - Pratt Whitney Twin Wasp Description04-20-2020 - Pratt Whitney Twin Wasp Junior Description04-15-2020 - Pratt Whitney Wasp Description04-13-2020 - Pratt Whitney Wasp Junior Description04-11-2020 - Italian Aero Industry, c 1934 (Members Section)04-11-2020 - Italian Regia Aeronautica, c 1934 (Members Section)04-11-2020 - Isotta Fraschini Factory, c 1934 (Members Section)04-11-2020 - Piaggio Factory, c 1934 (Members Section)04-11-2020 - Alfa Romeo Factory, c 1934 (Members Section)04-11-2020 - Fiat Factory, c 1934 (Members Section)04-08-2020 - Commparing WWII Soviet and U.S. Radials03-23-2020 - Gnome 80hp Carburetor Animation, by Sergio Pasquali03-04-2020 - Italian Aero Industry, c 1933 (Members Section)03-04-2020 - Issota Fraschini Factory, c 1933 (Members Section)03-04-2020 - Alfa Romeo Factory, c 1933 (Members Section)03-04-2020 - Piaggio Aero Engine Factory, c 1933 (Members Section)03-04-2020 - Italian Experimental Aircraft and Engine Development, c 1933 (Members Section)03-03-2020 - Issota Fraschini Engines, c 1931 (Members Section)03-03-2020 - Fiat Aero Engine Factory, c 1931 (Members Section)03-03-2020 - Italian Experimental Aero Engines, c 1932 (Members Section)03-03-2020 - Alfa Romeo Engines, c 1932 (Members Section)03-03-2020 - Issota Fraschini Engines, c 1932 (Members Section)03-03-2020 - Italian Regia Aeronautica Visit, c 1932 (Members Section)03-01-2020 - AEHS Members 2020 Newsletter #102-28-2020 - Italian Aero Industry, c 1931 (Members Section)02-28-2020 - Italian Experimental Aero Engines, c 1931 (Members Section)02-25-2020 - Wright Supercharger Principles (Members Section)02-25-2020 - Wright Engine Specification Preparation (Members Section)02-09-2020 - Reno 201902-05-2020 - Union Aircraft Engine Installation, Operation and Care (Members Section)02-05-2020 - Le Rhone 80 hp Instructions (Members Section)02-05-2020 - Hall-Scott A-7a Care and Operation (Members Section)02-05-2020 - Guiberson Diesel Engine Notes (Members Section)02-04-2020 - Hispano-Suiza 650 CV Types 12 Nb, 12 Nbr Description (Members Section)02-04-2020 - Hispano-Suiza Aviation Engine Installation (Members Section)01-30-2020 - Hispano-Suiza 650 CV Type 12Nbr Specification (Members Section)01-30-2020 - Hispano-Suiza 650 CV Type 12Nbr Illustrated Parts Catalog (see also 650 CV Type 12Nb) (Members Section)01-30-2020 - Hispano-Suiza 650 CV Type 12Nb Illustrated Parts Catalog (Members Section)01-30-2020 - Hamilton Standard 43E60, 34E60 Propeller Assembly, Installation (Members Section)01-30-2020 - D.R.P. (Pobjoy) Aurora 150hp Aircraft Engine (Members Section)01-24-2020 - Continental W670 Runner Gallery01-24-2020 - Continental Radials01-22-2020 - Rolls-Royce Merlin Model Differences and Timing (Members Section)01-21-2020 - Fiat AS8 Propeller Reduction Gear Animation01-21-2020 - Junkers Jumo 213 Valve Gear Drive Animation01-13-2020 - Pratt Whitney R-1340 3-D Printed Model by Stephen Stanley01-01-2020 - Napier Lion History12-14-2019 - 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 #412-07-2019 - The Hamilton Standard Superhydromatic Propeller, additional material12-04-2019 - Liberty 12 Crankcase and Engine CAD Renderings12-04-2019 - Vic Bentley s Nelson H-59 Restoration12-03-2019 - Book Review: Westinghouse Aviation Gas Turbine Designs Studies12-01-2019 - The Mathis 42-Cylinder Engine11-30-2019 - McCulloch XO-90-2 Target Drone Engine Qualification Test11-30-2019 - McCulloch XO-50-2 Target Drone Engine Calibration11-30-2019 - McCulloch YO-100-4 Calibration and Qualification for Rotorcycle Use11-30-2019 - McCulloch PN 10609B Starter Tests11-30-2019 - Kiekhaefer V-105-2 Calibration11-30-2019 - Kiekhaefer O-45-35 Starting Tests11-30-2019 - Kiekhaefer KB7ATS Experimental Target Drone Engine Performance and Endurance Tests11-30-2019 - Kiekhaefer Mercury KB 3-1/2-ST Starter Performance and Endurance Tests11-27-2019 - Waste Heat Utilization in High Output Aircraft Piston Engines11-25-2019 - 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 ContentsWright Installation Manual, 1939: Section 1 Chapter 1 Engine MountsWright Installation Manual, 1939: Section 1 Chapter 2 Cowling and NacellesWright Installation Manual, 1939: Section 1 Chapter 3 Fuel SystemWright Installation Manual, 1939: Section 1 Chapter 4 Lubrication SystemWright Installation Manual, 1939: Section 1 Chapter 5 Induction SystemWright Installation Manual, 1939: Section 1 Chapter 6 Exhaust SystemWright Installation Manual, 1939: Section 1 Chapter 7 Engine ControlsWright Installation Manual, 1939: Section 1 Chapter 8 Ignition SystemWright Installation Manual, 1939: Section 1 Chapter 9 AccessoriesWright Installation Manual, 1939: Section 2 Installation Inspection and TestWright Installation Manual, 1939: Section 2 Chapter 1 Installation InspectionWright Installation Manual, 1939: Section 2 Chapter 2 Test SpecificationWright Installation Manual, 1939: Section 2 Chapter 3 VibrationWright 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 Renderings09-25-2019 - Liberty 12 Intake Manifold CAD Renderings09-24-2019 - Allison Single and Double V-3420-B Installation Studies09-15-2019 - Allison V-3420-B Images09-12-2019 - Allison V-3420-A Images09-05-2019 - Liberty 12 Fuel Pump CAD Renderings09-05-2019 - Liberty 12A CAD Rendering by Stephen Stanley09-05-2019 - Pratt Whitney R-1340 CAD Rendering by Stephen Stanley09-03-2019 - AEHS Members 2019 Newsletter #308-23-2019 - Liberty 12 Cylinder and Crankcase CAD Renderings08-20-2019 - The Last Flying Curtiss Turboelectric Propeller - by Tom Fey08-17-2019 - U.S. Military Aircraft Manual Index08-16-2019 - U.S. Military Engine Manual Index08-14-2019 - Liberty 12 CAD Renderings08-14-2019 - Allison V-1710-G Images08-13-2019 - Allison V-1710-F Images08-12-2019 - Allison V-1710-E Images08-11-2019 - Allison V-1710-D Images08-10-2019 - Allison V-1710-C Images08-09-2019 - Allison V-1710-B Images08-08-2019 - Allison GV-1710-A Images08-07-2019 - Allison Piston Engine Specifications07-14-2019 - 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 Restoration07-01-2019 - 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 Propulsion06-18-2019 - Book Review: Studebaker s XH-935006-18-2019 - Book Review: America s Round-Engine Airliners06-07-2019 - 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 #205-12-2019 - 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 Designer03-29-2019 - Book Review: Early Westinghouse Axial Turbojets, by Paul J. Christiansen03-27-2019 - Twin Wasp D (R-2000) Model Differences (2.4M PDF). Courtesy of Wings Over the Rockies Museum and James Tegart03-26-2019 - Ford-Built R-4360s03-15-2019 - 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 May03-01-2019 - AEHS Members 2019 Newsletter #102-22-2019 - 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 Conway02-05-2019 - 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 Images12-08-2018 - 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 #412-01-2018 - Vintage Airline Posters12-01-2018 - BMW 801 Crankshaft Animations12-01-2018 - Junkers Jumo 213 Animation12-01-2018 - 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 Engine11-06-2018 - 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 Engine11-04-2018 - 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 Coverage10-15-2018 - Studebaker XH-9350 Firing Order10-11-2018 - Lycoming Engines in WWII Production10-11-2018 - Lycoming Wartime Engine Model SpecificationsO-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 Museum09-11-2018 - 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 Display09-08-2018 - 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 #309-01-2018 - Maybach Mb IVa 260 ps Parts Catlaog (Members Section)09-01-2018 - Packard-Built V-1650, Rolls-Royce Merlin XXVII Engineering Information08-22-2018 - Fuel Injection for the Aircraft Engine08-22-2018 - Packard Diesel DR-980 Instruction Manual (Members Section)08-21-2018 - The General Electric J4708-10-2018 - Pratt Whitney R-4360 Brochure (Members Section)08-09-2018 - Des H lices A riennes - A 1909 Propeller Design Text08-06-2018 - 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 Display07-11-2018 - 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 Diesel07-09-2018 - 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-77007-01-2018 - Ranger SVG-770 Internal Details (Members Section)06-14-2018 - AEHS Members 2018 Newsletter #206-11-2018 - The Hamilton Standard Superhydromatic Propeller06-01-2018 - Ranger L-440 Specifications and Internal Details06-01-2018 - Schubert Valveless Engine06-01-2018 - Moteur Sarolea type Epervier06-01-2018 - Wright-Tuttle (Renard License) Aircraft Motor06-01-2018 - Everel Single-Blade Propeller06-01-2018 - Metal Propellers Ltd06-01-2018 - Metal Propellers Ltd Advertisement06-01-2018 - Scott Flying Squirrl Light Aero Engine (16/34 bhp) Mark A.2.S06-01-2018 - Report on (postwar) Visit to Daimler-Benz A.G.06-01-2018 - Visits to Miscellaneous Aeronautical Establishments in the British Zone06-01-2018 - Turbine Engine Activity at Ernst Heinkel Aktiengesellschaft06-01-2018 - Hoover Hydraulic Controllable Pitch Propeller Models P40F400 and P40F50006-01-2018 - Hoover Hydraulic Constant Speed Propeller Models P42F300 and P43F25005-24-2018 - Propeller Shaft Dimensions05-20-2018 - Kenneth Zetterlund s Wright R-3350 TC Runs05-12-2018 - More Jacobs Aircraft Engine History05-01-2018 - 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 Description05-01-2018 - Smith Controllable Pitch Propeller05-01-2018 - Siemens Sh 20 Aircraft Engine05-01-2018 - Skymotor Aircraft Engines05-01-2018 - Sunbeam-Coatalen Aero Engines05-01-2018 - Tank Aero Engine05-01-2018 - Moteur L.V. Thomas 2T-SS (2 Temps - San Soupapes)05-01-2018 - Thomas Aeromotors05-01-2018 - Super Rhone Radial Aircraft Engine05-01-2018 - Moteurs Train Aviation05-01-2018 - U2 Leichtflug Motor05-01-2018 - Moteur A.L. Varcin A Cr mail res et Secteurs de Renversement de Mouvement04-24-2018 - Velie 70hp Aircraft Motor04-24-2018 - The Weir Aero Engine04-24-2018 - Western Airplane Motor04-24-2018 - Wolverine Aero 25-30hp Aircraft Engine04-24-2018 - Zundapp 50ps Flugmotor04-24-2018 - The Zeitlin Aero Engine04-23-2018 - The Fedden Mission to America: Section 4 Engines, Power Plants and Propellers04-18-2018 - The Jacobs R-75504-14-2018 - Jacobs L-4 and L-5 Power Curves and Specifications04-13-2018 - The Seppeler Propeller on the Messerschmitt Me-16304-06-2018 - Daimler-Benz DB603A Details04-06-2018 - Daimler-Benz DB601A,B Details04-06-2018 - The Liberty Motor03-26-2018 - Book Review: The Power for Flight03-24-2018 - Junkers Jumo 211 Photographs03-23-2018 - Junkers Jumo 205-C and 207 Diesel Engines Outstanding Features03-21-2018 - Curtiss OX-5 Overhaul Methods03-20-2018 - Bendix PS Series Carburetor Manual03-08-2018 - Pratt Whitney TF30-12, -12A Engine Characteristics Card03-08-2018 - Pratt Whitney TF30-P-1, -1A Engine Characteristics Card03-08-2018 - Westinghouse XJ40-WE-1 Engine Characteristics Card03-08-2018 - Wright Aero YJ67-W-3 Engine Characteristics Card03-08-2018 - Wright Aero YT47-W-1 Engine Characteristics Card03-08-2018 - Wright Aero YT49-W-1 Engine Characteristics Card03-08-2018 - AEHS Members 2018 Newsletter #103-03-2018 - More BMW 801 Animations, by Sergio Pasquali02-26-2018 - Continental C-Series Engines and Their Derivatives: The C-115 and C-12502-25-2018 - Continental C-Series Engines and Their Derivatives: The C75 and C8502-07-2018 - Reno 2017 (High-Resolution Images in the Members Section)01-31-2018 - Pratt Whitney R-4360 Valve Train Development01-12-2018 - Engine Images from the MTU Museum01-09-2018 - Engines in Museums: The MTU Museum01-03-2018 - Evaporative Cooling, Part 1: Through WWII01-03-2018 - Evaporative Cooling, Part 2: Post WWII12-01-2017 - 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. Raymond07-19-2017 - Book Review: Hucknall the Rolls-Royce Flight Test Establishment, by David Birch06-19-2017 - WWII Gunnery Target Engine Technical Analysis:Part 1. Background and General ConfigurationPart 2. The Righter 2-GS-17 (O-15-1) in DetailPart 3. The Righter O-15-3 EnginePart 4. Performance and Efficiency Comparison between O-15-1 and O-15-3 EnginesPart 5. The O-45-1 and Kiekhaefer O-45-35Part 6. Performance and Efficiency Comparison between O-45-1 and O-45-35 EnginesPart 7. Conclusion06-07-2017 - 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. Whitney01-11-2016 - Outstanding Compilation of Horizontally Opposed Aero Engine Information - by Jack Erickson12-21-2015 - 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 Christiansen06-02-2014 - U.S. National Archives I Navy Bureau of Aeronautics Index05-13-2014 - An Analysis of the Contra-Rotating Propellers on the 1943 Radioplane OQ-2 Gunnery Target Drone, by Tom Fey03-19-2014 - Ford's Aircraft Engine (Members Section)08-17-2013 - Aircraft Carburetors and Fuel Systems02-18-2013 - The Packard Variable Speed Drive, by Jerry Wells09-10-2012 - 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 Tools10-09-2011 - 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 Fuels07-21-2011 - The BMW 801 D-2 Kommandoger t (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. Raymond04-30-2010 - 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 1950-196008-22-2009 - 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 Documents02-06-2006 - Index to Navy ADI(k) Microfilms of German Documents10-28-2004 - USAF Case History Files Index ... Plus much, much more that is older than two years. Try the Google Search feature at the top of this page to search within the AEHS web site.

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