A Brief Review on Electromagnetic Aircraft Launch System
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China's Aircraft Carrier Ambitions
CHINA’S AIRCRAFT CARRIER AMBITIONS An Update Nan Li and Christopher Weuve his article will address two major analytical questions. First, what are the T necessary and suffi cient conditions for China to acquire aircraft carriers? Second, what are the major implications if China does acquire aircraft carriers? Existing analyses on China’s aircraft carrier ambitions are quite insightful but also somewhat inadequate and must therefore be updated. Some, for instance, argue that with the advent of the Taiwan issue as China’s top threat priority by late 1996 and the retirement of Liu Huaqing as vice chair of China’s Central Military Commission (CMC) in 1997, aircraft carriers are no longer considered vital.1 In that view, China does not require aircraft carriers to capture sea and air superiority in a war over Taiwan, and China’s most powerful carrier proponent (Liu) can no longer infl uence relevant decision making. Other scholars suggest that China may well acquire small-deck aviation platforms, such as helicopter carriers, to fulfi ll secondary security missions. These missions include naval di- plomacy, humanitarian assistance, disaster relief, and antisubmarine warfare.2 The present authors conclude, however, that China’s aircraft carrier ambitions may be larger than the current literature has predicted. Moreover, the major implications of China’s acquiring aircraft carriers may need to be explored more carefully in order to inform appropriate reactions on the part of the United States and other Asia-Pacifi c naval powers. This article updates major changes in the four major conditions that are necessary and would be largely suffi cient for China to acquire aircraft carriers: leadership endorsement, fi nancial affordability, a relatively concise naval strat- egy that defi nes the missions of carrier operations, and availability of requisite 14 NAVAL WAR COLLEGE REVIEW technologies. -
Adventures in Low Disk Loading VTOL Design
NASA/TP—2018–219981 Adventures in Low Disk Loading VTOL Design Mike Scully Ames Research Center Moffett Field, California Click here: Press F1 key (Windows) or Help key (Mac) for help September 2018 This page is required and contains approved text that cannot be changed. NASA STI Program ... in Profile Since its founding, NASA has been dedicated • CONFERENCE PUBLICATION. to the advancement of aeronautics and space Collected papers from scientific and science. The NASA scientific and technical technical conferences, symposia, seminars, information (STI) program plays a key part in or other meetings sponsored or co- helping NASA maintain this important role. sponsored by NASA. The NASA STI program operates under the • SPECIAL PUBLICATION. Scientific, auspices of the Agency Chief Information technical, or historical information from Officer. It collects, organizes, provides for NASA programs, projects, and missions, archiving, and disseminates NASA’s STI. The often concerned with subjects having NASA STI program provides access to the NTRS substantial public interest. Registered and its public interface, the NASA Technical Reports Server, thus providing one of • TECHNICAL TRANSLATION. the largest collections of aeronautical and space English-language translations of foreign science STI in the world. Results are published in scientific and technical material pertinent to both non-NASA channels and by NASA in the NASA’s mission. NASA STI Report Series, which includes the following report types: Specialized services also include organizing and publishing research results, distributing • TECHNICAL PUBLICATION. Reports of specialized research announcements and feeds, completed research or a major significant providing information desk and personal search phase of research that present the results of support, and enabling data exchange services. -
The Chinese Navy: Expanding Capabilities, Evolving Roles
The Chinese Navy: Expanding Capabilities, Evolving Roles The Chinese Navy Expanding Capabilities, Evolving Roles Saunders, EDITED BY Yung, Swaine, PhILLIP C. SAUNderS, ChrISToPher YUNG, and Yang MIChAeL Swaine, ANd ANdreW NIeN-dzU YANG CeNTer For The STUdY oF ChINeSe MilitarY AffairS INSTITUTe For NATIoNAL STrATeGIC STUdIeS NatioNAL deFeNSe UNIverSITY COVER 4 SPINE 990-219 NDU CHINESE NAVY COVER.indd 3 COVER 1 11/29/11 12:35 PM The Chinese Navy: Expanding Capabilities, Evolving Roles 990-219 NDU CHINESE NAVY.indb 1 11/29/11 12:37 PM 990-219 NDU CHINESE NAVY.indb 2 11/29/11 12:37 PM The Chinese Navy: Expanding Capabilities, Evolving Roles Edited by Phillip C. Saunders, Christopher D. Yung, Michael Swaine, and Andrew Nien-Dzu Yang Published by National Defense University Press for the Center for the Study of Chinese Military Affairs Institute for National Strategic Studies Washington, D.C. 2011 990-219 NDU CHINESE NAVY.indb 3 11/29/11 12:37 PM Opinions, conclusions, and recommendations expressed or implied within are solely those of the contributors and do not necessarily represent the views of the U.S. Department of Defense or any other agency of the Federal Government. Cleared for public release; distribution unlimited. Chapter 5 was originally published as an article of the same title in Asian Security 5, no. 2 (2009), 144–169. Copyright © Taylor & Francis Group, LLC. Used by permission. Library of Congress Cataloging-in-Publication Data The Chinese Navy : expanding capabilities, evolving roles / edited by Phillip C. Saunders ... [et al.]. p. cm. Includes bibliographical references and index. -
Flow Visualization Studies of VTOL Aircraft Models During Hover in Ground Effect
NASA Technical Memorandum 108860 Flow Visualization Studies of VTOL Aircraft Models During Hover In Ground Effect Nikos J. Mourtos, Stephane Couillaud, and Dale Carter, San Jose State University, San Jose, California Craig Hange, Doug Wardwell, and Richard J. Margason, Ames Research Center, Moffett Field, California Janua_ 1995 National Aeronautics and Space Administration Ames Research Center Moffett Field, California 94035-1000 Flow Visualization Studies of VTOL Aircraft Models During Hover In Ground Effect NIKOS J. MOURTOS,* STEPHANE COUILLAUD,* DALE CARTER,* CRAIG HANGE, DOUG WARDWELL, AND RICHARD J. MARGASON Ames Research Center Summary fountain fluid flows along the fuselage lower surface toward the jets where it is entrained by the jet and forms a A flow visualization study of several configurations of a vortex pair as sketched in figure 1(a). The jet efflux and jet-powered vertical takeoff and landing (VTOL) model the fountain flow entrain ambient temperature air which during hover in ground effect was conducted. A surface produces a nonuniform temperature profile. This oil flow technique was used to observe the flow patterns recirculation is called near-field HGI and can cause a on the lower surfaces of the model. Wing height with rapid increase in the inlet temperature which in turn respect to fuselage and nozzle pressure ratio are seen to decreases the thrust. In addition, uneven temperature have a strong effect on the wing trailing edge flow angles. distribution can result in inlet flow distortion and cause This test was part of a program to improve the methods compressor stall. In addition, the fountain-induced vortex for predicting the hot gas ingestion (HGI) for jet-powered pair can cause a lift loss and a pitching-moment vertical/short takeoff and landing (V/STOL) aircraft. -
SKI-JUMP LIMITATIONS and PLAN's SOLUTIONS
CAPS In Focus 25 July 2017 www.capsindia.org 61/17 SKI-JUMP LIMITATIONS AND PLAN’s SOLUTIONS Arjun Subramanian P Reports on Chinese naval aviation have been in the news lately and Chinese media is abuzz with photographs of the J-15 fighters operating from the PLAN’s first carrier – the Liaoning. The carrier was en-route to Hong Kong1 along with two escort warships when the flight operations were conducted. The PLAN even released a long video of the operations which gives some insights into the J-15 fighter and the role it will play. There is also some news on China building a carrier borne AEW aircraft to be operated from its CV-001 type vessels.2 China’s lone carrier, the refurbished old Soviet vessel – Varyag – is PLAN’s first experience with an aircraft carrier which it is so actively and boastfully projecting. China is steadily improving and adding up to its naval power projection capability. The released video was of very good resolution where every minute detail was visible and which enables inference of certain information.3 The video primarily contains take-offs and landings of the J- 15 fighter with and without load-outs. In several take-offs, the J-15 can be seen carrying the PL-12 medium range and PL-8 short range air-to-air missile in the middle and outer hard-points respectively. The PL-12 is an active radar-guided BVR missile and is similar to the Russian R-77 Adder and it is widely claimed that its seeker head is the same design as that of the R-77.4 The PL-8, on the other hand, is an IR guided missile and is believed to be based on the Israeli Python-3.5 In few other launches the aircraft can be seen taking off and landing with two YJ-83K anti-ship missiles slung under the centre-wing hard-point on each wing. -
China's Logistics Capabilities for Expeditionary Operations
China’s Logistics Capabilities for Expeditionary Operations The modular transfer system between a Type 054A frigate and a COSCO container ship during China’s first military-civil UNREP. Source: “重大突破!民船为海军水面舰艇实施干货补给 [Breakthrough! Civil Ships Implement Dry Cargo Supply for Naval Surface Ships],” Guancha, November 15, 2019 Primary author: Chad Peltier Supporting analysts: Tate Nurkin and Sean O’Connor Disclaimer: This research report was prepared at the request of the U.S.-China Economic and Security Review Commission to support its deliberations. Posting of the report to the Commission's website is intended to promote greater public understanding of the issues addressed by the Commission in its ongoing assessment of U.S.-China economic relations and their implications for U.S. security, as mandated by Public Law 106-398 and Public Law 113-291. However, it does not necessarily imply an endorsement by the Commission or any individual Commissioner of the views or conclusions expressed in this commissioned research report. 1 Contents Abbreviations .......................................................................................................................................................... 3 Executive Summary ............................................................................................................................................... 4 Methodology, Scope, and Study Limitations ........................................................................................................ 6 1. China’s Expeditionary Operations -
Lockheed Martin F-35 Lightning II Incorporates Many Significant Technological Enhancements Derived from Predecessor Development Programs
AIAA AVIATION Forum 10.2514/6.2018-3368 June 25-29, 2018, Atlanta, Georgia 2018 Aviation Technology, Integration, and Operations Conference F-35 Air Vehicle Technology Overview Chris Wiegand,1 Bruce A. Bullick,2 Jeffrey A. Catt,3 Jeffrey W. Hamstra,4 Greg P. Walker,5 and Steve Wurth6 Lockheed Martin Aeronautics Company, Fort Worth, TX, 76109, United States of America The Lockheed Martin F-35 Lightning II incorporates many significant technological enhancements derived from predecessor development programs. The X-35 concept demonstrator program incorporated some that were deemed critical to establish the technical credibility and readiness to enter the System Development and Demonstration (SDD) program. Key among them were the elements of the F-35B short takeoff and vertical landing propulsion system using the revolutionary shaft-driven LiftFan® system. However, due to X- 35 schedule constraints and technical risks, the incorporation of some technologies was deferred to the SDD program. This paper provides insight into several of the key air vehicle and propulsion systems technologies selected for incorporation into the F-35. It describes the transition from several highly successful technology development projects to their incorporation into the production aircraft. I. Introduction HE F-35 Lightning II is a true 5th Generation trivariant, multiservice air system. It provides outstanding fighter T class aerodynamic performance, supersonic speed, all-aspect stealth with weapons, and highly integrated and networked avionics. The F-35 aircraft -
Human Factors of Flight-Deck Checklists: the Normal Checklist
NASA Contractor Report 177549 Human Factors of Flight-Deck Checklists: The Normal Checklist Asaf Degani San Jose State University Foundation San Jose, CA Earl L. Wiener University of Miami Coral Gables, FL Prepared for Ames Research Center CONTRACT NCC2-377 May 1990 National Aeronautics and Space Administration Ames Research Center Moffett Field, California 94035-1000 CONTENTS 1. INTRODUCTION ........................................................................ 2 1.1. The Normal Checklist .................................................... 2 1.2. Objectives ...................................................................... 5 1.3. Methods ......................................................................... 5 2. THE NATURE OF CHECKLISTS............................................... 7 2.1. What is a Checklist?....................................................... 7 2.2. Checklist Devices .......................................................... 8 3. CHECKLIST CONCEPTS ......................................................... 18 3.1. “Philosophy of Use” .................................................... 18 3.2. Certification of Checklists ........................................... 22 3.3. Standardization of Checklists ...................................... 24 3.4. Two/three Pilot Cockpit ............................................... 25 4. AIRLINE MERGERS AND ACQUISITIONS .......................... 27 5. LINE OBSERVATIONS OF CHECKLIST PERFORMANCE.. 29 5.1. Initiation ...................................................................... -
Supersonic STOVL Ejector Aircraft from a Propulsion Point of View
N84-24581 NASA Technical Memorandum 83641 9 Supersonic STOVL Ejector Aircraft from a Propulsion Point of View R. Luidens, R. Plencner, W. Haller, and A. blassman Lewis Research Center Cleveland, Ohio Prepared for the Twentieth Joint Propulsion Coiiference cosponsored by the AIAA, SAE, and ASME i Cincinnati, Ohio, June 11-13, 1984 I 1 1 SUPERSONIC STOVL EJECTOR AIRCRAFT FROH A PROPULSION POINT OF VIEW R hidens,* R. Plencner,** W. Hailer.** and A Glassman+ National Aeronautics and Space Administration Lewis Research Center Cleveland, Ohio Abstract 1 Higher propulsion system thrust for greater lift-off acceleration. The paper first describes a baseline super- sonic STOVL ejector aircraft, including its 2 Cooler footprint, for safer, more propulsion and typical operating modes, and convenient handllng, and lower observability identiftes Important propulsion parameters Then a number of propulsion system changes are 3. Alternattve basic propulsion cycles evaluated in terms of improving the lift-off performance; namely, aft deflection of the ejec- The approach of this paper is to use the tor jet and heating of the ejector primary air aircraft of reference 5 as a baseline. and then either by burning or using the hot englne core to consider some candidate propulsion system flow The possibility for cooling the footprint growth options The vehicle described in refe- is illustrated for the cases of mixing or lnter- rence 5 was selected on the basis of detailed changlng the fan and core flows, and uslng a alrcraft design and performance analyses The -
Navy News Week 10-2
NAVY NEWS WEEK 10-2 5 March 2018 Winter in the Frisia for Culdrose Sea King on its final mission over Europe 22/02/2018 For the last time a Royal Navy Sea King has appeared in European skies after completing its final mission on the Continent. For two weeks, a helicopter from 849 Naval Air Squadron at Culdrose has been directing the actions of supersonic F-16 jets over the North Sea and northern Holland – a key stepping stone for working with the UK’s new F-35 stealth fighters in a couple of years time. It’s the task of 849 with their distinctive radar-equipped helicopters to scour the skies for threats to a naval group – and to direct interceptors such as the F-16 Falcons in for the kill if necessary. It took the veteran helicopter eight hours to cover the 500 miles from its base in western Cornwall to Leeuwarden in Frisia, north-eastern Netherlands. A 40-strong detachment of air and ground crew was dispatched to the Dutch Air Force Base for Exercise Skinners’ Gold 4 – an exercise the squadron has attended in previous run-outs. The Sea King Mk7 flew eight night missions with its observer/radar operator in the back of the helicopter choreographing the movements of up to four Dutch jets at a time either using voice commands (English is the common language of the skies) or by using the military’s data-sharing system, Link 16. The Brits guided their Dutch colleagues to intercept up to half a dozen ‘enemy’ jets at a time – which proved to be an invaluable training for 849, particularly as the scenarios played out over Dutch and North Sea skies could not to be recreated back in the UK. -
Aircraft Carriers – Glug Glug Glug….. Really? Significance of Carrier Borne Airpower for India
www.maritimeindia.org Aircraft Carriers – Glug Glug Glug….. Really? Significance of Carrier Borne Airpower for India Author: Dinesh Yadav Date: 23 July 2018 In his recent article published by the Lowy Institute, titled “Glug, Glug, Glug: India’s interest in unsinkable Aircraft Carriers”, David Brewster1, probes India’s medium term plan to develop into a three carrier fleet. Brewster cites huge costs (acquisition, maintenance and operational) and vulnerability issues attached with the Carrier Task Force (CTFs) in support of his assertion and, as an alternative, advocates the use of ‘unsinkable’ island bases as cheaper and more effective options. Dismissing flat-tops as vulnerable status symbols for India, the author recommends the deferment of INS Vishal and instead, use the freed-up capital in shoring up India’s military capabilities in the Andaman and Nicobar (A&N) and Lakshadweep island chains. India currently operates only one carrier, INS Vikramaditya (erstwhile Admiral Gorshkov of the Soviet/ Russian Navy). Whilst India’s first indigenous aircraft carrier, INS Vikrant (IAC-I) is being built by Cochin Shipyard (CSL) and is likely to be commissioned in end 20202, India has already embarked on its follow-on induction3, likely to be named as INS Vishal (IAC-II), and expected to be much larger and more potent. A three-carrier force would allow the Indian Navy to operate one CTF on each of its seaboard at all times, with the third carrier involved in refit or maintenance. Bang for Buck – Misplaced Example of Great Britain The Royal Navy currently operates4 only one Aircraft Carrier, HMS Queen Elizabeth (commissioned in December 2017). -
China Naval Modernization: Implications for U.S
China Naval Modernization: Implications for U.S. Navy Capabilities—Background and Issues for Congress (name redacted) Specialist in Naval Affairs April 25, 2018 Congressional Research Service 7-.... www.crs.gov RL33153 China Naval Modernization: Implications for U.S. Navy Capabilities Summary The question of how the United States should respond to China’s military modernization effort, including its naval modernization effort, is a key issue in U.S. defense planning and budgeting. China has been steadily building a modern and powerful navy since the early to mid-1990s. China’s navy has become a formidable military force within China’s near-seas region, and it is conducting a growing number of operations in more-distant waters, including the broader waters of the Western Pacific, the Indian Ocean, and waters around Europe. Observers view China’s improving naval capabilities as posing a challenge in the Western Pacific to the U.S. Navy’s ability to achieve and maintain control of blue-water ocean areas in wartime— the first such challenge the U.S. Navy has faced since the end of the Cold War. More broadly, these observers view China’s naval capabilities as a key element of a broader Chinese military challenge to the long-standing status of the United States as the leading military power in the Western Pacific. China’s naval modernization effort encompasses a wide array of platform and weapon acquisition programs, including anti-ship ballistic missiles (ASBMs), anti-ship cruise missiles (ASCMs), submarines, surface ships, aircraft, unmanned vehicles (UVs), and supporting C4ISR (command and control, communications, computers, intelligence, surveillance, and reconnaissance) systems.