A History of the Development of the Variable Pitch Propeller by Patrick
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The Medicine Bow Wind Energy Project
The Medicine Bow Wind Energy Project James Bailey Historic Reclamation Projects Bureau of Reclamation 2014 Table of Contents Table of Contents ............................................................................................................................. i The Medicine Bow Wind Energy Project ....................................................................................... 1 Introduction ................................................................................................................................. 1 Wind Energy: A Historic Context............................................................................................... 3 Enter the Curious Feds ................................................................................................................ 5 The Rise and Fall of Nuclear ...................................................................................................... 7 Energy Crisis: Alternative Sources Revisited ............................................................................. 8 Reclamation’s Early Investigations .......................................................................................... 12 Planning Studies and Project Approval .................................................................................... 15 The Project Gets Underway ...................................................................................................... 20 Project Dedication—and Project Problems ............................................................................. -
Air-Cooled Cylinders 1
Air-Cooled Aircraft Engine Cylinders An Evolutionary Odyssey by George Genevro Part 1 - From the Past 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. The manner in which the question is stated is misleading, however, since all waste heat that comes through the structure of an engine is eventually delivered to the air. In “liquid-cooled” engines the coolant can be water, ethylene glycol, a mixture of the two, or one of the many other liquids that have been tried and found wanting. Its primary purpose is to carry heat from the cylinder barrel and head to the radiator through which air, the actual cooling medium, flows. Proponents of liquid-cooling–now as in the past–can point to some benefits and operational advantages such as lessened hazard of shock cooling an engine, being able to direct dedicated coolant flow to critical areas in the cylinder head such as the exhaust valve seat and guide area, flexibility in radiator placement, greater structural rigidity in the engine, and having the option of designing airframes with a relatively small cross-sectional area that could still house a powerful engine. With every advantage, imagined or real, there is almost always a price to pay. Those who opted for liquid-cooled engines had to accept added weight, greater possibility of battle damage in military applications, and greater system complexity as the penalties. Such is life. -
Crankpin Bearings in High Output Aircraft Piston Engines the Evolution of Their Design and Loading by Robert J
Crankpin Bearings in High Output Aircraft Piston Engines The Evolution of their Design and Loading by Robert J. Raymond July 2015 Abstract powered truck. There you will invariably find a 6-cylinder, 4-stroke cycle, open chamber, turbocharged, aftercooled The development of the crankpin bearing in high output engine with electronically controlled fuel injection. Gone are aircraft piston engines is traced over the period 1915-1950 in the two-stroke cycle, divided combustion chambers, and the a large number of liquid and air cooled engines of both many variants of mechanical injection systems found in American and European origin. The changes in bearing truck engines of the past. dimensions are characterized as dimensionless ratios and At the end of the large piston engine era there was still a the resulting changes in the associated weights of rotating broad spectrum of engine configurations being produced and reciprocating parts as weight densities at the crankpin. and actively developed. Along with the major division Bearing materials and developments are presented to indi- between liquid and air-cooled engines there was a turbo- cate how they accommodated increasing bearing loads. compounded engine, a four-row air-cooled radial engine, Bearing loads are characterized by maximum unit bearing engines with poppet valves and engines with sleeve valves, pressure and minimum oil film thickness and plotted as a all in production. There were also a two-stroke turbo-com- function of time. Most of the data was obtained from the lit- pounded Diesel engine, a 2-stroke spark ignition sleeve erature but some results were calculated by the author. -
Hydromatic Propeller
HYDROMATIC PROPELLER International Historic Engineering Landmark Hamilton Standard The American Society of A Division of United Technologies Mechanical Engineers Windsor Locks, Connecticut November 8, 1990 Historical Significance The text of this International Landmark Designation: The Hamilton Standard Hydromatic propeller represented INTERNATIONAL HISTORIC MECHANICAL a major advance in propeller design and laid the groundwork ENGINEERING LANDMARK for further advancements in propulsion over the next 50 years. The Hydromatic was designed to accommodate HAMILTON STANDARD larger blades for increased thrust, and provide a faster rate HYDROMATIC PROPELLER of pitch change and a wider range of pitch control. This WINDSOR LOCKS, CONNECTICUT propeller utilized high-pressure oil, applied to both sides of LATE 1930s the actuating piston, for pitch control as well as feathering — the act of stopping propeller rotation on a non-functioning The variable-pitch aircraft propeller allows the adjustment engine to reduce drag and vibration — allowing multiengined in flight of blade pitch, making optimal use of the engine’s aircraft to safely continue flight on remaining engine(s). power under varying flight conditions. On multi-engined The Hydromatic entered production in the late 1930s, just aircraft it also permits feathering the propeller--stopping its in time to meet the requirements of the high-performance rotation--of a nonfunctioning engine to reduce drag and military and transport aircraft of World War II. The vibration. propeller’s performance, durability and reliability made a The Hydromatic propeller was designed for larger blades, major contribution to the successful efforts of the U.S. and faster rate of pitch change, and wider range of pitch control Allied air forces. -
The Connection
The Connection ROYAL AIR FORCE HISTORICAL SOCIETY 2 The opinions expressed in this publication are those of the contributors concerned and are not necessarily those held by the Royal Air Force Historical Society. Copyright 2011: Royal Air Force Historical Society First published in the UK in 2011 by the Royal Air Force Historical Society All rights reserved. No part of this book may be reproduced or transmitted in any form or by any means, electronic or mechanical including photocopying, recording or by any information storage and retrieval system, without permission from the Publisher in writing. ISBN 978-0-,010120-2-1 Printed by 3indrush 4roup 3indrush House Avenue Two Station 5ane 3itney O72. 273 1 ROYAL AIR FORCE HISTORICAL SOCIETY President 8arshal of the Royal Air Force Sir 8ichael Beetham 4CB CBE DFC AFC Vice-President Air 8arshal Sir Frederick Sowrey KCB CBE AFC Committee Chairman Air Vice-8arshal N B Baldwin CB CBE FRAeS Vice-Chairman 4roup Captain J D Heron OBE Secretary 4roup Captain K J Dearman 8embership Secretary Dr Jack Dunham PhD CPsychol A8RAeS Treasurer J Boyes TD CA 8embers Air Commodore 4 R Pitchfork 8BE BA FRAes 3ing Commander C Cummings *J S Cox Esq BA 8A *AV8 P Dye OBE BSc(Eng) CEng AC4I 8RAeS *4roup Captain A J Byford 8A 8A RAF *3ing Commander C Hunter 88DS RAF Editor A Publications 3ing Commander C 4 Jefford 8BE BA 8anager *Ex Officio 2 CONTENTS THE BE4INNIN4 B THE 3HITE FA8I5C by Sir 4eorge 10 3hite BEFORE AND DURIN4 THE FIRST 3OR5D 3AR by Prof 1D Duncan 4reenman THE BRISTO5 F5CIN4 SCHOO5S by Bill 8organ 2, BRISTO5ES -
British Aircraft in Russia Bombers and Boats
SPRING 2004 - Volume 51, Number 1 British Aircraft in Russia Viktor Kulikov 4 Bombers and Boats: SB-17 and SB-29 Combat Operations in Korea Forrest L. Marion 16 Were There Strategic Oil Targets in Japan in 1945? Emanuel Horowitz 26 General Bernard A. Schriever: Technological Visionary Jacob Neufeld 36 Touch and Go in Uniforms of the Past JackWaid 44 Book Reviews 48 Fleet Operations in a Mobile War: September 1950 – June 1951 by Joseph H. Alexander Reviewed by William A. Nardo 48 B–24 Liberator by Martin Bowman Reviewed by John S. Chilstrom 48 Bombers over Berlin: The RAF Offensive, November 1943-March 1944 by Alan W. Cooper Reviewed by John S. Chilstrom 48 The Politics of Coercion: Toward A Theory of Coercive Airpower for Post-Cold War Conflict by Lt. Col. Ellwood P. “Skip” Hinman IV Reviewed by William A. Nardo 49 Ending the Vietnam War: A History of America’s Involvement and Extrication from the Vietnam War by Henry Kissinger Reviewed by Lawrence R. Benson 50 The Dynamics of Military Revolution, 1300-2050 by MacGregor Knox and Williamson Murray, eds. Reviewed by James R. FitzSimonds 50 To Reach the High Frontier: A History of U.S. Launch Vehicles by Roger D. Launius and Dennis R. Jenkins, eds. Reviewed by David F. Crosby 51 History of Rocketry and Astronautics: Proceedings of the Thirtieth History Symposium of the International Academy of Astronautics, Beijing, China, 1996 by Hervé Moulin and Donald C. Elder, eds. Reviewed by Rick W. Sturdevant 52 Secret Empire: Eisenhower, the CIA, and the Hidden Story of America’s Space Espionage by Philip Taubman Reviewed by Lawrence R. -
The Market for Aviation APU Engines
The Market for Aviation APU Engines Product Code #F644 A Special Focused Market Segment Analysis by: Aviation Gas Turbine Forecast Analysis 2 The Market for Aviation APU Engines 2011 - 2020 Table of Contents Executive Summary .................................................................................................................................................2 Introduction................................................................................................................................................................2 Methodology ..............................................................................................................................................................2 Trends..........................................................................................................................................................................3 The Competitive Environment...............................................................................................................................3 Market Statistics .......................................................................................................................................................3 Table 1 - The Market for Aviation APU Engines Unit Production by Headquarters/Company/Program 2011 - 2020 ..................................................5 Table 2 - The Market for Aviation APU Engines Value Statistics by Headquarters/Company/Program 2011 - 2020.................................................10 Figure 1 - The Market -
Sept09frontiers.Pdf
Frontierswww.boeing.com/frontiers SEPTEMBERAUGUSTJUNE 2009 20092009 / / / Volume VolumeVolume VIII, VIII,VIII, Issue IssueIssue IV VII Space for growth The arrival of Boeing’s newest satellite is opening doors to opportunities in the commercial market SEPTEMBER 2009 / BOEING FRONTIERS BOEING FRONTIERS / SEPTEMBER 2009 / VOLUME VIII, ISSUE V On the Cover 14 New bird Nearly one-third of the approximately 300 commercial satellites in orbit today were built by Boeing at its million- square-foot satellite factory in El Segundo, Calif. The latest model, known as the Boeing 702B, opens the door to many opportunities in the commercial market, where customers are looking for adaptable, medium- power satellites. Four years in development, the 702B from Boeing Space and Intelligence Systems made its debut in July. COVer IMAge: MiKE ConneLLY, Boeing InteLSAT PROGRAM DIRECTOR OF DIVISION OPERATIONS (LEFT), AND MIKE NEUMAN, 702B PROGRAM DIRECTOR, LEAD SPACE AND INTELLIGENCE SYSTEMS’ 702B SATELLITE PROGRAM. DANA REIMER/BOEING AND BOB FERGUSON/BOEING PHOTO: SPACECRAFT TECHNICIAN PAUL IM OF BOEING’S EL SEGUNDO, CALIF., SATELLITE FACTORY, ASSEMBLES A BATTERY PANEL USED ON THE 702B. BOB FERGUSON/BOEING BOEING FRONTIERS / SEPTEMBER 2009 / VOLUME VIII, ISSUE V 3 Frontiers Publisher: Tom Downey Table of contents Editorial director: Anne Toulouse EDITORIAL TEAM Executive editor: Paul Proctor: 312-544-2938 Editor: James Wallace: 312-544-2161 Managing editor: Vineta Plume: 312-544-2954 Art director: Brandon Luong: 312-544-2118 24 Commercial Airplanes editor: Julie O’Donnell: 206-766-1329 Super trip in 82 days Engineering, Operations & Technology Earlier this year, a Boeing-led team that included two Super Hornets circled the globe, editor: stopping in a number of countries to perform at air shows and display the jet fighters. -
Development and Application of Management Tools Within a High-Mix, Low-Volume Lean Aerospace Manufacturing Environment
Development and Application of Management Tools within a High-Mix, Low-Volume Lean Aerospace Manufacturing Environment By Kevin McKenney S.B. Mechanical Engineering, Massachusetts Institute of Technology (2000) Submitted to the Department of Mechanical Engineering and the Sloan School of Management in Partial Fulfillment of the Requirements for the Degrees of Master of Science in Mechanical Engineering and Master of Business Administration MASSACHUSETTS INST E OF TECHNOLOGY In Conjunction with the Leaders for Manufacturing Program at the J Massachusetts Institute of Technology June 2005 LIBRARIES @2005 Massachusetts Institute of Technology. All rights reserved. Signature of Author Department of Mechanical EngiiYeering Sloan School of Management May 6, 2005 Certified by DavidHardt, Thesis Supervisor Professor of Mechanical Engineering Certified by Stephen Graves, Thesis Supervisor Abraham Siegel Professor of Management Accepted by David CapodiJatpoxeciti Director of Mastof's Prowgram Slan School of Management Accepted by____ LallBRa rnt Mehancal um ttee BARKER Department of Mechanical Engineering 2 Development and Application of Management Tools within a High-Mix, Low-Volume Lean Aerospace Manufacturing Environment By Kevin McKenney Submitted to the Department of Mechanical Engineering and the Sloan School of Management on May 6, 2005 in partial fulfillment of the Requirements for the Degrees of Master of Science in Mechanical Engineering and Master of Business Administration Abstract The design and implementation of a lean production system is a complex task requiring an intimate understanding of the fundamental lean principles. Much of the published lean literature is written at a high level of abstraction and contains very basic examples. When lean tools are applied blindly to complex, highly constrained systems, lean implementation becomes challenging and often ineffective. -
The History of Danish Military Aircraft Volume 1 Danish Military Aircraft Introduction
THE HISTORY OF DANISH MILITARY AIRCRAFT VOLUME 1 DANISH MILITARY AIRCRAFT INTRODUCTION This is a complete overview of all aircraft which has served with the Danish military from the first feeble start in 1912 until 2017 Contents: Volume 1: Introduction and aircraft index page 1-4 Chapter 1 - Marinens Flyvevæsen (Navy) page 5-14 Chapter 2 - Hærens Flyvertropper (Army) page 15-30 Chapter 3 – 1940-45 events page 31-36 Chapter 4 – Military aircraft production page 37-46 Chapter 5 – Flyvevåbnet (RDAF) page 47-96 Volume 2: Photo album page 101-300 In this Volume 1 Each of the five overview chapters shows a chronological list of the aircraft used, then a picture of each type in operational paintscheme as well as some special colourschemes used operationally and finally a list of each aircraft’s operational career. The material has been compiled from a multitude of sources the first of which is my research in the Danish National and Military archives, the second is material from the archives of Flyvevåbnet with which I had a fruitful cooperation in the years 1966 to 1980 and the third are the now (fortunately) many books and magasines as well as the Internet which contains information about Danish military aircraft. The pictures in Volume 1 and Volume 2-the photo album- have mainly been selected from the viewpoint of typicality and rarety and whereever possible pictures of operational aircraft in colour has been chosen. Most of the b/w picures in some way originate from the FLV historical archives, some were originally discovered there by me, whereas others have surfaced later. -
Gallantry in the Air
Cranwell Aviation Heritage Museum Gallantry in the Air 0 This is the property of Cranwell Aviation Heritage Centre, a North Kesteven District Council service. The contents are not to be reproduced or further disseminated in any format without written permission from NKDC. Introduction This file contains material and images which are intended to complement the displays and presentations in Cranwell Aviation Heritage Museum’s exhibition areas. This file is intended to let you discover more about the heroism of aircrew whose acts of bravery during World War 2 resulted in them receiving gallantry awards. Where possible all dates regarding medal awards and promotions have been verified with entries published in the London Gazette. This file is the property of Cranwell Aviation Heritage Museum, a North Kesteven District Council service. The contents are not to be reproduced or further disseminated in any format, without written permission from North Kesteven District Council. 1 This is the property of Cranwell Aviation Heritage Centre, a North Kesteven District Council service. The contents are not to be reproduced or further disseminated in any format without written permission from NKDC. Contents Page Wg Cdr Roderick Learoyd 3 FO Leslie Manser 5 WO Norman Jackson 7 Sqn Ldr Arthur Scarf 9 Sqn Ldr James Lacey 11 Wg Cdr Hugh Malcolm 13 Wg Cdr Guy Gibson 15 Gp Capt Douglas Bader 17 Wg Cdr Leonard Cheshire 19 Gp Capt Francis Beamish 21 FS John Hannah 24 Flt Lt Pat Pattle 26 FS George Thompson 28 Flt Lt William Reid 30 FO Kenneth Campbell 32 Gp Capt James Tait 34 Gp Capt John Braham 36 Sqn Ldr John Nettleton 38 Wg Cdr Adrian Warburton 40 Wg Cdr Brendan Finucane 42 Flt Lt Eric Lock 44 AVM James Johnson 46 Sqn Ldr Johnny Johnson 48 FS Leslie Chapman 50 2 This is the property of Cranwell Aviation Heritage Centre, a North Kesteven District Council service. -
Raiden Miniatures Voting File Top 16 Votes Me-264 11 CR.42 8 Spitfire Mk22/24 8 He 115 8 8 P38 Lightning 8 Me-262 7 ME 263 7
Sheet1 Raiden Miniatures Voting File Top 16 Votes Me-264 11 CR.42 8 Spitfire Mk22/24 8 He 115 8 Focke Wulf FW187 8 P38 Lightning 8 Me-262 7 ME 263 7 B-17G 7 F-86 Sabre 7 Mig 15 7 F8F Bearcat 6 N1K1 Rex Floatplane 6 Yak-15 6 Breda Ba.88 Lince 6 RO 37 6 British Votes Spitfire Mk22/24 8 Bristol Blenheim I 5 Fairy Battle 5 De Havilland Hornet 5 De Haviland Mosquito 5 Miles Master M.20 5 Hawker Typhoon 5 Bolton Paul Defiant 4 Page 1 Sheet1 Seafang 4 Spiteful 4 Hawker Hart (inline engine) 4 Hawker Sea Hawk 3 De Haviland DH100 'Vampire' 3 Supermarine Attacker 3 Vickers Valiant 3 Hawker Hart (Radial Engine) 2 Fairey Monofox 2 Hawker Demon 2 Vickers Vincent 2 Bristol Brigand 2 Gloster Gauntlet 2 Hurricane IID (40mm AT) 2 Spitfire XIV 2 Commonweath CA 15 2 Blackburn Botha 2 Meteor I 1 Fairey Firefly 1 Spitfire V Floatplane 1 Hawker Fury 1 Bristol Bulldog 1 Bristol Bulldog (radial) 1 Supermarine Swift 1 Handley Page Victor 1 Avro Lancaster 1 Bristol Beaufighter TFX 1 Gloster Pioneer 1 Page 2 Sheet1 De Havilland DH 89 Rapide 1 De Havilland DH 82 Tiger Moth 1 Westland Whirlwind (fighter) 1 Tempest II 1 TSR2 1 Spitfire Vb 1 Tornado F.3 1 Spitfire VIII 1 Spitfire IX 1 Sepecat Jaguar 1 Handley page Halifax II (triangular fin & Merlin Engines) 1 Handley page Halifax III (Square fin & Hercules Engines) 1 English Electric Lightning 1 Hector Fox 1 German Votes Me-264 11 He115 8 Focke Wulf FW187 8 Me 262 7 ME 263 7 JU-87G Stuka 5 DO 17 5 Arado Ar-234C (4 BMW jets) 4 He 280 4 Blohm und Voss BV 40 (Glider Fighter) 4 Ar 68 4 DO 22 4 Page 3 Sheet1 FW P.VII Flitzer