DOCSLIB.ORG

Initial Sizing of a Roadable Personal Air Vehicle Using Design Of

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Initial Sizing of a Roadable Personal Air Vehicle Using Design Of Initial sizing of a roadable personal air vehicle using design of experiments for various engine types Jaeyoung Cha and Juyeol Yun Department of Aerospace Engineering, Sejong University, Seoul, Republic of Korea, and Ho-Yon Hwang Department of Aerospace Engineering and Convergence Engineering for Intelligence Drone, Sejong University, Seoul, Republic of Korea Abstract Purpose – The purpose of this paper is to analyze and compare the performances of novel roadable personal air vehicle (PAV) concepts that meet established operational requirements with different types of engines. Design/methodology/approach – The vehicle configuration was devised considering the dimensions and operational restrictions of the roads, runways and parking lots in South Korea. A folding wing design was adopted for road operations and parking. The propulsion designs considered herein use gasoline, diesel and hybrid architectures for longer-range missions. The sizing point of the roadable PAV that minimizes the wing area was selected, and the rate of climb, ground roll distance, cruise speed and service ceiling requirements were met. For various engine types and mission profiles, the performances of differently sized PAVs were compared with respect to the MTOW, wing area, wing span, thrust-to-weight ratio, wing loading, power-to-weight ratio, brake horsepower and fuel efficiency. Findings – Unlike automobiles, the weight penalty of the hybrid system because of the additional electrical components reduced the fuel efficiency considerably. When the four engine types were compared, matching the total engine system weight, the internal combustion (IC) engine PAVs had better fuel efficiency rates than the hybrid powered PAVs. Finally, a gasoline-powered PAV configuration was selected as the final design because it had the lowest MTOW, despite its slightly worse fuel efficiency compared to that of the diesel-powered engine. Research limitations/implications – Although an electric aircraft powered only by batteries most capitalizes on the operating cost, noise and emissions benefits of electric propulsion, it also is most hampered by range limitations. Air traffic integration or any safety, and noise issues were not accounted in this study. Practical implications – Aircraft sizing is a critical aspect of a system-level study because it is a prerequisite for most design and analysis activities, including those related to the internal layout as well as cost and system effectiveness analyses. The results of this study can be implemented to design a PAV. Social implications – This study can contribute to the establishment of innovative PAV concepts that can alleviate today’s transportation problems. Originality/value – This study compared the sizing results of PAVs with hybrid engines with those having IC engines. Keywords Aircraft design, Constraint analysis, Initial sizing, Mission profile, Personal air vehicle, Roadable PAV Paper type Research paper a Nomenclature ZL = zero lift angle of attack; a fi CL = maximum lift coef cient angle of attack; Symbols max aC = cruise angle of attack; ’ fi estraight wing = Oswald s span ef ciency of straight wing; CD = drag coefficient at a zero angle of attack; ’ fi 0 eswept wing = Oswald s span ef ciency of swept wing; D = diameter of the propeller; AR = aspect ratio; PBHP = brake horsepower; ^ LE = leading edge sweep angle; RPM = revolutions per minute of the propeller; CLa = lift curve slope; b = Mach number parameter; k = ratio of the two-dimensional lift curve slope to 2p; © Jaeyoung Cha, Juyeol Yun and Ho-Yon Hwang. Published by Emerald Publishing Limited. This article is published under the Creative Commons ^c/2 = sweepback of the mid chord; fi Attribution (CC BY 4.0) licence. Anyone may reproduce, distribute, CL0 = lift coef cient at a zero angle of attack; translate andcreate derivative works of this article (for both commercial and non-commercial purposes), subject to full attribution to the original publication and authors. The full terms of this licence may be seen at The current issue and full text archive of this journal is available on Emerald http://creativecommons.org/licences/by/4.0/legalcode Insight at: https://www.emerald.com/insight/1748-8842.htm This work is supported by the Korea Agency for Infrastructure Technology Advancement (KAIA) grant funded by the Ministry of Land, Infrastructure and Transport (Grant 21CTAP-C157731-02). Aircraft Engineering and Aerospace Technology 93/11 (2021) 1–14 Received 28 April 2020 Emerald Publishing Limited [ISSN 1748-8842] Revised 21 January 2021 [DOI 10.1108/AEAT-04-2020-0073] Accepted 11 February 2021 1 Roadable personal air vehicle Aircraft Engineering and Aerospace Technology Jaeyoung Cha, Juyeol Yun and Ho-Yon Hwang Volume 93 · Number 11 · 2021 · 1–14 VTAS = airspeed; V = airspeed; PD = pitch angle of the propeller; VV = vertical speed; Vinduced = induced velocity; CD min = minimum drag coefficient; Ƞideal = ideal propeller efficiency; k = lift induced drag constant; Ƞnew = new propeller efficiency; Vstall = stall speed; Vinduced = induced velocity; CLmax = maximum lift coefficient; and WW = predicted weight of the wing; Wi = weight after the iterative process. SW = trapezoidal wing area; WFW = weight of fuel in the wing; Definitions, acronyms and abbreviations ^ c/4 = wing sweep at 25% of the mean geometric chord; HALE = high altitude long endurance; l = wing taper ratio; UAV = unmanned aerial vehicle; nz = ultimate load factor; SADF = solar aircraft design framework; W0 = design gross weight; GA = general aviation; WHT = predicted weight of horizontal tail wing; VTOL = vertical take-off landing; SHT = trapezoidal horizontal tail wing area; eVTOL = electronic vertical take-off landing; ^ HT = horizontal tail wing sweep at 25% mean UAM = urban air mobility; geometric chord; DOD = department of defense; l HT = horizontal tail wing taper ratio; MTOW = maximum take-off weight; WF = predicted weight of the fuselage; T/W = thrust to weight ratio; SFUS = fuselage wetted area; W/S = wing loading; lFS = length of the fuselage structure; P/W = power to weight ratio; dFS = depth of the fuselage structure; UIUC = university of Illinois urbana-champaign; VP = volume of the pressurized cabin section; DOE = design of experiment; D P = cabin pressure differential; LHS = Latin hypercube sampling; WMLG = predicted weight of the main landing gear; VBA = visual basic for applications; and nl = ultimate landing load factor; IC = internal combustion. Wl = design landing weight; Lm = length of the main landing gear strut; WNLG = predicted weight of the nose landing gear; Introduction nl = ultimate landing load factor; The concept of door-to-door air mobility has long been a Wl = design landing weight; dream in the aerospace industry. As a potential means of Ln = length of the nose landing gear strut; providing the freedom of rapid door-to-door mobility beyond WEI = predicted weight of the installed engine; what is widely available today via automobiles, numerous WENG = uninstalled engine weight; roadable aircraft or flying-car concepts have been proposed, N = number of engines; ENG patented, built and flown during the past half century by W = predicted weight of the fuel system; FS inventors, entrepreneurs and military and civil research Q = total fuel quantity; tot institutes (Lim et al.,2015). Q = fuel quantity in integral fuel tanks; int However, personal air vehicles (PAVs) for transportation N = number of fuel tanks; TANK have not been developed in any significant way. A new style WCTRL = predicted weight of the flight control system; b = wing span; of transportation is essential to facilitate the movement of individuals from place to place without numerous WAV = predicted weight of the avionics installation system; complications. Furthermore, the current infrastructure must be considered such that a solution that can be WUAV = predicted weight of the uninstalled avionics; seamlessly integrated into existing facilities and WEL = predicted weight of the electrical system; WFURN = predicted weight of the furnishing; infrastructure, such as highways, roads, parking lots and ’ WO = maximum take-off weight; airports, can be devised. The world s major cities are fold becoming increasingly overpopulated, and the land space mw = total weight of a folding wing; available for ground transportation is becoming extremely mnonfold = weight of the non-folding wing; w limited. Therefore, air transportation may become more ins mfold = weight of any inserted structure; important in the future (Coronado et al.,2007). mech mfold = folding mechanism weight; Based on current requirements, the scientific community mech mpin = pin weight; started to focus on general aviation (GA) and personal CLTO = lift coefficient during the take-off run; transport aircraft. NASA has recognized that personal air travel CDTO = drag coefficient during the take-off run; using an on-demand, highly distributed air transportation q = dynamic pressure; system would allow for improved mobility in congested areas in SG = ground run; the USA. Therefore, they began research on this topic through VLOF = lift off speed; the Small Aircraft Transportation System initiative (Viken m = ground friction constant; et al., 2006), focusing on airspace-related issues considering the g = acceleration due to gravity; operation of PAVs. NASA has been investigating specific 2 Roadable personal air vehicle Aircraft Engineering and Aerospace Technology Jaeyoung Cha, Juyeol Yun and Ho-Yon Hwang Volume 93 · Number 11 · 2021 · 1–14 vehicle technologies in the PAV sector
Load more

Recommended publications
  • Jay Carter, Founder &
    CARTER AVIATION TECHNOLOGIES An Aerospace Research & Development Company Jay Carter, Founder & CEO CAFE Electric Aircraft Symposium www.CarterCopters.com July 23rd, 2017 Wichita©2015 CARTER AVIATIONFalls, TECHNOLOGIES,Texas LLC SR/C is a trademark of Carter Aviation Technologies, LLC1 A History of Innovation Built first gyros while still in college with father’s guidance Led to job with Bell Research & Development Steam car built by Jay and his father First car to meet original 1977 emission standards Could make a cold startup & then drive away in less than 30 seconds Founded Carter Wind Energy in 1976 Installed wind turbines from Hawaii to United Kingdom to 300 miles north of the Arctic Circle One of only two U.S. manufacturers to survive the mid ‘80s industry decline ©2015 CARTER AVIATION TECHNOLOGIES, LLC 2 SR/C™ Technology Progression 2013-2014 DARPA TERN Won contract over 5 majors 2009 License Agreement with AAI, Multiple Military Concepts 2011 2017 2nd Gen First Flight Find a Manufacturing Later Demonstrated Partner and Begin 2005 L/D of 12+ Commercial Development 1998 1 st Gen 1st Gen L/D of 7.0 First flight 1994 - 1997 Analysis & Component Testing 22 years, 22 patents + 5 pending 1994 Company 11 key technical challenges overcome founded Proven technology with real flight test ©2015 CARTER AVIATION TECHNOLOGIES, LLC 3 SR/C™ Technology Progression Quiet Jump Takeoff & Flyover at 600 ft agl Video also available on YouTube: https://www.youtube.com/watch?v=_VxOC7xtfRM ©2015 CARTER AVIATION TECHNOLOGIES, LLC 4 SR/C vs. Fixed Wing • SR/C rotor very low drag by being slowed Profile HP vs.
    [Show full text]
  • Assessment of a Fuel Cell Powered Air Taxi in Urban Flight Conditions
    Assessment of a Fuel Cell Powered Air Taxi in Urban Flight Conditions M. Husemann1, C. Glaser2, E. Stumpf3 Institute of Aerospace Systems (ILR), RWTH Aachen University, 52062 Aachen, Germany This paper presents a first estimation of potential impacts on the flight operations of small air taxis in urban areas using a fuel cell instead of a battery as an energy resource. The expanding application of electric components is seen as a possibility to reduce operating costs and environmental impacts in the form of noise and pollutant emissions due to lower consumption of fossil fuels. The majority of such designs have so far been based on the use of (not yet) sufficiently efficient batteries. Long charging times, possible overheating or a limited service life in the form of limited charging cycles pose a challenge to the development of such aircraft. Parameter studies are conducted to identify possible advantages of using a fuel cell. In particular, the range and payload capacity ist investigated and first effects on the cost structure will be presented. The evaluation of the studies shows that the use of fuel cells enables significantly longer ranges than the use of batteries. In addition, the range potential gained can be used, for example, to transport more payload over the same distance. Furthermore, the technological maturity in the form of the individual energy density and the weight of the powertrain unit has a significant effect on the cost structure. Fuel cells therefore have a high potential for applications in the mobility sector, but still require extensive research efforts. I. Introduction Increasing traffic volume due to advanced technologies and growing mobility demand often leads to heavy traffic and circumstantial routing, especially in metropolitan areas.
    [Show full text]
  • System of Systems Modeling for Personal Air Vehicles
    9th AIAA/ISSMO Symposium on Multidisciplinary Analysis and Optimization AIAA 2002-5620 4-6 September 2002, Atlanta, Georgia SYSTEM -OF -SYSTEMS MO DELING FOR PERSONAL AIR VEHICLES Daniel DeLaurentis, Taewoo Kang, Choongiap Lim, Dimitri Mavris, Daniel Schrage Aerospace Systems Design Laboratory (ASDL) School of Aerospace Engineering Georgia Institute of Technology, Atlanta, GA 30332 http://www.asdl.gatech.edu Abstract Introduction On -going research is described in this paper System -of -systems problems contain multiple, concerning the development of a methodology for interacting, non -homogeneous functional elements, each adaptable system studies of future transportation of which may be represented as traditional systems solutions based upon personal air vehicles. Two themselves. This collection often exists within multiple challenges in this resea rch are presented. The hierarchies and is not packaged in a physical unit. Thus, challenge of deriving requirements for revolutionary according to this preliminary definition, an aircraft is a transportation concepts is a difficult one, due to the system while a network of personal aircraft operated fact that future transportation system infrastructure collaboratively with ground systems for improved and market economics are inter -related (and transportation is a system -of -systems. In such a probl em, uncertain) parts of the eq uation. Thus, there is a need for example, there are multiple, distinct vehicle types, for a macroscopic transportation model, and such a ground and air control networks, economic drivers, etc. task is well suited for the field of techniques known The increase in complexity brought by system -of - as system dynamics. The determination and system problems challenges the current state -of -the -art in visualization of the benefits of proposed personal air conceptual design methods.
    [Show full text]
  • FLYING CARS / ROADABLE AIRPLANES AUGUST 2012 Please Send Updates and Comments to Tom Teel: [email protected] Terrafugia
    FLYING CARS / ROADABLE AIRPLANES AUGUST 2012 Please send updates and comments to Tom Teel: [email protected] Terrafugia INTERNATIONAL FLYING CAR ASSOCIATION http://www.flyingcarassociation.com We'd like to welcome you to the International Flying Car Association. Our goal is to help advance the emerging flying car industry by creating a central resource for information and communication between those involved in the industry, news networks, governments, and those seeking further information worldwide. The flying car industry is in its formative stages, and so is IFCA. Until this site is fully completed, we'd like to recommend you visit one of these IFCA Accredited Sites. www.flyingcars.com www.flyingcarreviews.com www.flyingcarnews.com www.flyingcarforums.com REFERENCE INFORMATION Roadable Times http://www.roadabletimes.com Transformer - Coming to a Theater Near You? http://www.aviationweek.com/Blogs.aspx?plckBlo PARAJET AUTOMOTIVE - SKYCAR gId=Blog:a68cb417-3364-4fbf-a9dd- http://www.parajetautomotive.com/ 4feda680ec9c&plckController=Blog&plckBlogPage= In January 2009 the Parajet Skycar expedition BlogViewPost&newspaperUserId=a68cb417-3364- team, led by former British army officer Neil 4fbf-a9dd- Laughton and Skycar inventor Gilo Cardozo 4feda680ec9c&plckPostId=Blog%253aa68cb417- successfully completed its inaugural flight, an 3364-4fbf-a9dd- incredible journey from the picturesque 4feda680ec9cPost%253a6b784c89-7017-46e5- surroundings of London to Tombouctou. 80f9- Supported by an experienced team of overland 41a312539180&plckScript=blogScript&plckElement
    [Show full text]
  • Remote ID NPRM Maps out UAS Airspace Integration Plans by Charles Alcock
    PUBLICATIONS Vol.49 | No.2 $9.00 FEBRUARY 2020 | ainonline.com « Joby Aviation’s S4 eVTOL aircraft took a leap forward in the race to launch commercial service with a January 15 announcement of $590 million in new investment from a group led by Japanese car maker Toyota. Joby says it will have the piloted S4 flying as part of the Uber Air air taxi network in early adopter cities before the end of 2023, but it will surely take far longer to get clearance for autonomous eVTOL operations. (Full story on page 8) People HAI’s new president takes the reins page 14 Safety 2019 was a bad year for Part 91 page 12 Part 135 FAA has stern words for BlackBird page 22 Remote ID NPRM maps out UAS airspace integration plans by Charles Alcock Stakeholders have until March 2 to com- in planned urban air mobility applications. Read Our SPECIAL REPORT ment on proposed rules intended to provide The final rule resulting from NPRM FAA- a framework for integrating unmanned air- 2019-100 is expected to require remote craft systems (UAS) into the U.S. National identification for the majority of UAS, with Airspace System. On New Year’s Eve, the exceptions to be made for some amateur- EFB Hardware Federal Aviation Administration (FAA) pub- built UAS, aircraft operated by the U.S. gov- When it comes to electronic flight lished its long-awaited notice of proposed ernment, and UAS weighing less than 0.55 bags, (EFBs), most attention focuses on rulemaking (NPRM) for remote identifica- pounds.
    [Show full text]
  • SP's Airbuz June-July, 2011
    SP’s 100.00 (INDIA-BASED BUYER ONLY) ` An Exclusive Magazine on Civil A viation from India www.spsairbuz.net June-July, 2011 green engines INTERVIEW: PRATT & WHITNEY SLEEP ATTACK GENERAL AviatiON SHOW REPOrt: EBACE 2011 AN SP GUIDE PUBLICATION RNI NUMBER: DELENG/2008/24198 47 Years of Excellence Personified 6 Aesthetically Noteworthy Publications 2.2 Million Thought-Provoking Releases 25 Million Expert Reports Voicing Industry Concerns …. aspiring beyond excellence. www.spguidepublications.com InsideAdvt A4.indd back Cover_Home second option.indd ad black.indd 1 1 4/30/201017/02/11 1:12:15 11:40 PM AM Fifty percent quieter on-wing. A 75 percent smaller noise footprint on the ground. The Pratt & Whitney PurePower® Geared Turbofan™ engine can easily surpass the most stringent noise regulations. And because it also cuts NOx emissions and reduces CO2 emissions by 3,000 tons per aircraft per year, you can practically hear airlines, airframers and the rest of the planet roar in uncompromising approval. Learn more at PurePowerEngines.com. It’s in our power.™ Compromise_SPs Air Buzz.indd 1 5/9/11 4:05 PM Client: Pratt & Whitney Commercial Engines Ad Title: PurePower - Compromise Publication: SP’s Air Buzz Trim: 210 mm x 267 mm • Bleed: 220 mm x 277 mm • Live: 180 mm x 226 mm Table of Contents SP’s An Exclusive Magazine on Civil A viation from India www.spsairbuz.net May-June, 2011 Cover: 100.00 (INDIA-BASED BUYER ONLY) Airlines have been investing green ` heavily in fuel-efficient engines INTERVIEW: PRATT & WHITNEY SLEEP ATTACK Technology
    [Show full text]
  • Treball Final De Grau
    TREBALL FINAL DE GRAU TÍTOL DEL TFG: Air taxi transportation infrastructures in Barcelona TITULACIÓ: Grau en Enginyeria d’Aeronavegació AUTOR: Alexandru Nicorici Ionut DIRECTOR: José Antonio Castán Ponz DATA: 19 de juny del 2020 Títol: Air taxi transportation infrastructures in Barcelona Autor: Alexandru Nicorici Ionut Director: José Antonio Castán Ponz Data: 19 de juny del 2020 Resum El següent projecte parteix de la visió d’un futur on la mobilitat urbana es reparteix també al medi aèri. A partir d’aquesta premissa, s’escull el dron de passatgers com a mitjà de transport i es busca adaptar tot un sistema infrastructural per al vehicle autònom dins el perímetre d’una ciutat, Barcelona. En un inici, la primera pregunta a respondre és: permet la normativa actual l’ús de drons de passatgers autònoms en zones urbanes? Tant les regulacions europees com les nacionals espanyoles han estat estudiades i resumides per determinar que sí es permeten operacions amb aquest tipus de vehicles i es preveu la seva integració dintre de l’aviació civil. Seguidament, un estudi de mercat de taxi drons és realitzat amb l’objectiu d’esbrinar si la tecnologia d’avui dia permet operar a paràmetres òptims i oferir el servei de taxi d’una manera completament segura i satisfactòria per al client. Prototips en fase de test i actualment funcionals han estat analitzats; per finalment, elegir un d’aquest últims com a candidat apte per al transport de persones dins la capital catalana. Un cop es té el vehicle de transport, cal mirar si la pròpia ciutat ofereix garanties d’èxit per aquest servei de transport aeri.
    [Show full text]
  • Technical University of Munich Professorship for Modeling Spatial Mobility
    Technical University of Munich Professorship for Modeling Spatial Mobility ENVIRONMENTAL EVALUATION OF URBAN AIR MOBILITY OPERATION Author: ALONA PUKHOVA Supervised by: Prof. Dr.-Ing. Rolf Moeckel (TUM) M. Sc. Raoul Rothfeld (Bauhaus Luftfahrt e.V.) 24.04.2019 Contents Abstract iv Acknowledgements v Acronym List vi 1 Introduction 1 1.1 Urban Air Mobility . 1 1.2 Advent of electric mobility and current state of the technology . 2 1.3 The impact of transportation on environment . 6 1.4 Research questions . 8 2 Literature Review 9 2.1 Emission modelling tools, emission factor . 9 2.2 Environmental evaluation of conventional transportation . 11 2.3 Effect of electrification in transportation on the environment . 13 2.3.1 Conventional and electric cars . 13 2.3.2 Electric Buses . 16 2.3.3 Electric bikes and scooters . 17 2.4 Air vehicle types and characteristics . 19 2.5 Source and composition of electricity . 26 i 3 Methodology 30 3.1 MATSim and UAM Extension . 30 3.2 Munich City Scenario . 31 3.2.1 Status quo (baseline) . 33 3.2.2 UAM integration . 33 3.3 Emission Calculation . 35 3.3.1 Electricity Mix . 37 3.3.2 Air Vehicle . 39 3.3.3 Conventional and electric cars . 41 3.3.4 Bus . 42 3.3.5 Tram . 44 3.3.6 U-Bahn (Underground Train) . 45 3.3.7 Sub-Urban and Regional Trains . 46 4 Results 49 4.1 Baseline Scenario . 49 4.2 Urban Air Vehicle . 51 4.3 UAM Scenario . 55 4.4 Comparison of BaU and UAM Scenarios .
    [Show full text]
  • Zhejiang Geely Holding Group Co. Ltd. Assigned 'BBB-' Rating; Outlook Stable
    Zhejiang Geely Holding Group Co. Ltd. Assigned 'BBB-' Rating; Outlook Stable 19-Mar-2019 05:38 EDT View Analyst Contact Information We expect Zhejiang Geely Holding Group Co. Ltd. to continue to gain market share, supported by good product design, improving quality, and a strong pipeline of new models at its subsidiaries. This is despite uncertainties in global auto demand. In our view, the China-based automaker will maintain modest leverage, thanks to its stable profitability and strong operating cash flows. On March 19, 2019, S&P Global Ratings assigned its 'BBB-' long-term issuer credit rating to Zhejiang Geely Holding. The stable outlook reflects our view that Zhejiang Geely Holding will continue to gradually grow its auto revenue and profit, and sustain moderate leverage over the next 12-24 months, despite a competitive and volatile market. HONG KONG (S&P Global Ratings) March 19, 2019--The rating on Zhejiang Geely Holding reflects our expectation that the company will continue to strengthen its position in the global and China's automotive industry over the next 12-24 months. In our view, Zhejiang Geely Holding could also improve its groupwide competitive position. This will be supported by sustained technology improvement, strong product pipeline, platform synergy, and successful marketing and sales execution of its major subsidiaries Geely Automobile Holdings Ltd. (Geely Auto), Lynk & Co, and Volvo Car AB (Volvo Car). We expect Geely Auto to continue its solid sales momentum over the next 12-24 months, outpacing market growth. The sales momentum would stem from the sustained quality improvements on the back of its research and development (R&D) effort and comprehensive cooperation with Volvo Car.
    [Show full text]
  • Future of Vertical Flight
    www.vtol.org Kenneth Swartz, Regional Director – Americas The Vertical Flight Society www.vtol.org | [email protected] Kitty Hawk Cora © Vertical Flight Society: CC-BY-SA 4.0 © Vertical Flight Society: CC-BY-SA 4.0 Released March 2018 1 www.vtol.org . Founded as “The American Helicopter Society, Inc.” 75 years ago in Connecticut on Feb. 25, 1943 – “For the purpose of collecting, compiling and disseminating information concerning the helicopter” – Sikorsky Aircraft received its order for the first American helicopters on January 5, 1943 (28 XR-4 helicopters) . The first and longest-serving helicopter non-profit Sikorsky XR-4 helicopter – Founding members Igor Sikorsky, Arthur Young, Frank Piasecki, Courtesy of Sikorsky Aircraft Corp. Stanley Hiller, Reggie Brie, A.A. Griffiths, etc. – Included engineers, pilots, operators and presidents from industry, academia and government in Allied countries . Now 6,000 individual and 95 corporate members . Advancing vertical flight worldwide First Annual AHS Awards Banquet Born with the American Helicopter Industry Oct. 7, 1944 © Vertical Flight Society: CC-BY-SA 4.0 2 www.vtol.org © Vertical Flight Society: CC-BY-SA 4.0 3 www.vtol.org . The international professional society for those working to advance vertical flight – Founded in 1943 as the American Helicopter Society – Everything from VTOL MAVs/UAS to helicopters and eVTOL to STOVL (everything vertical except rockets) CFD of Joby S4, Aug 2015 . Expands knowledge about vertical flight technology and promotes its application around the world . Advances safety and acceptability . Advocates for vertical flight R&D funding . Helps educate and support today’s and tomorrow’s vertical flight engineers and leaders VFF Scholarship Winners at AHS Forum 71, May 2015 © Vertical Flight Society: CC-BY-SA 4.0 4 www.vtol.org .
    [Show full text]
  • A New VTOL Propelled Wing for Flying Cars
    A new VTOL propelled wing for flying cars: critical bibliographic analysis TRANCOSSI, Michele <http://orcid.org/0000-0002-7916-6278>, HUSSAIN, Mohammad, SHIVESH, Sharma and PASCOA, J Available from Sheffield Hallam University Research Archive (SHURA) at: http://shura.shu.ac.uk/16848/ This document is the author deposited version. You are advised to consult the publisher's version if you wish to cite from it. Published version TRANCOSSI, Michele, HUSSAIN, Mohammad, SHIVESH, Sharma and PASCOA, J (2017). A new VTOL propelled wing for flying cars: critical bibliographic analysis. SAE Technical Papers, 01 (2144), 1-14. Copyright and re-use policy See http://shura.shu.ac.uk/information.html Sheffield Hallam University Research Archive http://shura.shu.ac.uk 20XX-01-XXXX A new VTOL propelled wing for flying cars: critical bibliographic analysis Author, co-author (Do NOT enter this information. It will be pulled from participant tab in MyTechZone) Affiliation (Do NOT enter this information. It will be pulled from participant tab in MyTechZone) Abstract 2. acceleration of the fluid stream on the upper surface of the wing by mean of EDF propellers [13] that produces a much higher lift coefficient, with respect to any other aircrafts (up to 9-10); This paper is a preliminary step in the direction of the definition of a 3. very low stall speed (lower than 10m/s) and consequent increase radically new wing concept that has been conceived to maximize the of the flight envelope in the low speed domain up to 10÷12 m/s; lift even at low speeds. It is expected to equip new aerial vehicle 4.
    [Show full text]
  • The the Roadable Aircraft Story
    www.PDHcenter.com www.PDHonline.org Table of Contents What Next, Slide/s Part Description Flying Cars? 1N/ATitle 2 N/A Table of Contents 3~53 1 The Holy Grail 54~101 2 Learning to Fly The 102~155 3 The Challenge 156~194 4 Two Types Roadable 195~317 5 One Way or Another 318~427 6 Between the Wars Aircraft 428~456 7 The War Years 457~572 8 Post-War Story 573~636 9 Back to the Future 1 637~750 10 Next Generation 2 Part 1 Exceeding the Grasp The Holy Grail 3 4 “Ah, but a man’s reach should exceed his grasp, or what’s a heaven f?for? Robert Browning, Poet Above: caption: “The Cars of Tomorrow - 1958 Pontiac” Left: a “Flying Auto,” as featured on the 5 cover of Mechanics and Handi- 6 craft magazine, January 1937 © J.M. Syken 1 www.PDHcenter.com www.PDHonline.org Above: for decades, people have dreamed of flying cars. This con- ceptual design appeared in a ca. 1950s issue of Popular Mechanics The Future That Never Was magazine Left: cover of the Dec. 1947 issue of the French magazine Sciences et Techniques Pour Tous featur- ing GM’s “RocAtomic” Hovercar: “Powered by atomic energy, this vehicle has no wheels and floats a few centimeters above the road.” Designers of flying cars borrowed freely from this image; from 7 the giant nacelles and tail 8 fins to the bubble canopy. Tekhnika Molodezhi (“Tech- nology for the Youth”) is a Russian monthly science ma- gazine that’s been published since 1933.
    [Show full text]