'"%GUIDEBOOK for ANALYSIS W O of TETHER APPLICATIONS
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Greetings Members and Friends of EAA Chapter 866
Dunn Airpark approx.. 1 mile west Landing This is Chain of Lakes Park behind Parrish Hospital. Dunn Airpark flyers take note, one of ours used this to land on NO damage done to plane or anything on the ground! Commendable! Greetings Members and Friends of EAA Chapter 866, Les Boatright Happy Early Independence Day!! I hope you all have a Happy, Safe, and Fun-Filled Fourth of July! With all the long hours of daylight, this is a great time of year to do some aviating, just make sure you steer clear of the “Bombs Bursting in Air” and other Independence Day Holiday Hazards. But most of all, don’t forget that we’ll be serving up some Firecracker Hot Flap-Jacks on the morning Saturday July 1st. I hope to see you all there! PANTHER UPDATE As most of you know, since the beginning of the year I’ve been working with two other chapter members, your V.P. Ed Brennan, and also Bob Rychel to build a Panther Light Sport Aircraft. One of the great things about building this airplane is the fact that it gives me something else to write about in the monthly chapter newsletter. That reminds me . You other builders out there who have some amazing projects underway, we’d love to read something about your projects too. Tell us how they’re coming along, and send a few pictures. I know there are at least a dozen active builder projects in our chapter right now with at least 3 that are close to being finished. -
The Space Elevator Development Program
55th International Astronautical Congress 2004 - Vancouver, Canada IAC-04-IAA.3.8.2.01 THE SPACE ELEVATOR DEVELOPMENT PROGRAM Bradley C. Edwards Carbon Designs, Inc., United States [email protected] ABSTRACT For 40 years, the space elevator has been a concept in science fiction and appearing occasionally in technical journals. Versions of the space elevator concept have generally been megalithic in design. However, recent advances in technology and new designs for an initial space elevator have presented a much smaller and a more realistic version that has created a renewed interest in serious technical study. There are now over a dozen entities and hundreds of engineers and scientists with active research related to the space elevator. The activity includes conferences, engineering competitions, extensive media coverage, international collaborations, publications and private investment. These activities are rapidly expanding with the number of publications in 2004 nearly ten times the total for the prior forty years. INTRODUCTION The space elevator concept has been around for spacecraft, the power delivery system, many years (Tower of Babel, Jack and the challenges to the system, etc. Beanstalk, Clarke’s Fountains of Paradise, Robinson’s Red Mars) and between 1960 and The basic design presented in the NIAC work 1999 a few technical studies addressed the has stressed simplicity – a single, small, static basics of the system (Moravec, 1977; Isaacs, ribbon with mechanical climbers that ascend 1966; Pearson, 1975; Smitherman, 2000). These using conventional electric motors (figure 1). studies addressed the oscillations inherit in the The design implements conventional technology system, the taper requirements, and the general with little or no development wherever possible. -
Stable Orbits of Rigid, Rotating, Precessing, Massive Rings
Stable Orbits of Rigid, Rotating, Precessing, Massive Rings Edward D. Rippert Whitehawk Systems, 3 Whitehawk Circle, Boise, ID, 83716, USA. [email protected] The dynamics of a rigid, rotating, precessing, massive ring orbiting a point mass within the perimeter of the ring are considered. It is demonstrated that orbits dynamically stable against perturbations in three dimensions exist for a range of rigid body rotation parameters of the ring. Previous analysis and some well-known works of fiction have considered the stability of both rigid and flexible, non-precessing ring systems and found that they are unstable in the plane of the ring unless an active stabilization system is employed. There does not appear to be any analyses previously published considering rigid body precession of such a system or that demonstrate passive stability in three dimensions. Deviations from perfect rigidity and possible applications of such a system are discussed. Keywords: Orbital Ring, Ring World, Stability, Precession, Magic Angle I. Introduction Solid rings rotating about a central mass have been considered for various applications ranging from a ring of geosynchronous satellites around the Earth [1] (Polyakov-Ring) to fictional accounts of a gigantic artificial habitat around a star rotating to provide artificial gravity [2] (Niven-Ring). A Polyakov-Ring rotates at or slightly above the orbital speed at its distance from the central mass. As such it lacks significant tension on the ring and is a flexible structure. It has been shown that such a structure is unstable against perturbations in the plane of the ring but can be stabilized by a feedback control system controlling the local length of ring segments [3]. -
Cislunar Tether Transport System
FINAL REPORT on NIAC Phase I Contract 07600-011 with NASA Institute for Advanced Concepts, Universities Space Research Association CISLUNAR TETHER TRANSPORT SYSTEM Report submitted by: TETHERS UNLIMITED, INC. 8114 Pebble Ct., Clinton WA 98236-9240 Phone: (206) 306-0400 Fax: -0537 email: [email protected] www.tethers.com Report dated: May 30, 1999 Period of Performance: November 1, 1998 to April 30, 1999 PROJECT SUMMARY PHASE I CONTRACT NUMBER NIAC-07600-011 TITLE OF PROJECT CISLUNAR TETHER TRANSPORT SYSTEM NAME AND ADDRESS OF PERFORMING ORGANIZATION (Firm Name, Mail Address, City/State/Zip Tethers Unlimited, Inc. 8114 Pebble Ct., Clinton WA 98236-9240 [email protected] PRINCIPAL INVESTIGATOR Robert P. Hoyt, Ph.D. ABSTRACT The Phase I effort developed a design for a space systems architecture for repeatedly transporting payloads between low Earth orbit and the surface of the moon without significant use of propellant. This architecture consists of one rotating tether in elliptical, equatorial Earth orbit and a second rotating tether in a circular low lunar orbit. The Earth-orbit tether picks up a payload from a circular low Earth orbit and tosses it into a minimal-energy lunar transfer orbit. When the payload arrives at the Moon, the lunar tether catches it and deposits it on the surface of the Moon. Simultaneously, the lunar tether picks up a lunar payload to be sent down to the Earth orbit tether. By transporting equal masses to and from the Moon, the orbital energy and momentum of the system can be conserved, eliminating the need for transfer propellant. Using currently available high-strength tether materials, this system could be built with a total mass of less than 28 times the mass of the payloads it can transport. -
Exploring Design and Policy Options for Orbital Infrastructure Projects by Lieutenant Junior Grade Benjamin L. Putbrese, U.S. Na
Exploring Design and Policy Options for Orbital Infrastructure Projects by Lieutenant Junior Grade Benjamin L. Putbrese, U.S. Navy B.S. Aerospace Engineering United States Naval Academy, 2013 Submitted to the Engineering Systems Division in Partial Fulfillment of the Requirements for the Degree of Master of Science in Technology and Policy at the Massachusetts Institute of Technology June 2015 ©2015 Benjamin L. Putbrese. All rights reserved. The author hereby grants to MIT permission to reproduce and to distribute publicly paper and electronic copies of this thesis document in whole or in part in any medium now known or hereafter created. Signature of Author: ________________________________________________________________ Engineering Systems Division May 8, 2015 Certified by:_______________________________________________________________________ Daniel E. Hastings Cecil and Ida Green Education Professor of Engineering Systems and Aeronautics and Astronautics Thesis Supervisor Accepted by: _____________________________________________________________________ Dava J. Newman Professor of Aeronautics and Astronautics and Engineering Systems Director, Technology and Policy Program 2 This work is sponsored by the United States Department of Defense under Contract FA8721-05- C-0002. Opinions, interpretations, conclusions and recommendations are those of the author and are not necessarily endorsed by the United States Government. 3 Exploring Design and Policy Options for Orbital Infrastructure Projects by Lieutenant Junior Grade Benjamin L. -
Air and Space Power Journal: Fall 2011
Fall 2011 Volume XXV, No. 3 AFRP 10-1 From the Editor Personnel Recovery in Focus ❙ 6 Lt Col David H. Sanchez, Deputy Chief, Professional Journals Capt Wm. Howard, Editor Senior Leader Perspective Air Force Personnel Recovery as a Service Core Function ❙ 7 It’s Not “Your Father’s Combat Search and Rescue” Brig Gen Kenneth E. Todorov, USAF Col Glenn H. Hecht, USAF Features Air Force Rescue ❙ 16 A Multirole Force for a Complex World Col Jason L. Hanover, USAF Department of Defense (DOD) Directive 3002.01E, Personnel Recovery in the Department of Defense, highlights personnel recovery (PR) as one of the DOD’s highest priorities. As an Air Force core function, PR has experienced tremendous success, having performed 9,000 joint/multinational combat saves in the last two years and having flown a total of 15,750 sorties since 11 September 2001. Despite this admirable record, the author contends that the declining readiness of aircraft and equipment as well as chronic staffing shortages prevents Air Force rescue from meeting the requirements of combatant commanders around the globe. To halt rescue’s decline, a numbered Air Force must represent this core function, there- by ensuring strong advocacy and adequate resources for this lifesaving, DOD-mandated function. Strategic Rescue ❙ 26 Vectoring Airpower Advocates to Embrace the Real Value of Personnel Recovery Maj Chad Sterr, USAF The Air Force rescue community has expanded beyond its traditional image of rescuing downed air- crews to encompass a much larger set of capabilities and competencies that have strategic impact on US operations around the world. -
Tethers in Space Handbook - Second Edition
Tethers In Space Handbook - Second Edition - (NASA-- - I SECOND LU IT luN (Spectr Rsdrci ystLSw) 259 P C'C1 ? n: 1 National Aeronautics and Space Administration Office of Space Flight Advanced Program Development NASA Headquarters Code MD Washington, DC 20546 This document is the product of support from many organizations and individuals. SRS Technologies, under contract to NASA Headquarters, compiled, updated, and prepared the final document. Sponsored by: National Aeronautics and Space Administration NASA Headquarters, Code MD Washington, DC 20546 Contract Monitor: Edward J. Brazil!, NASA Headquarters Contract Number: NASW-4341 Contractor: SRS Technologies Washington Operations Division 1500 Wilson Boulevard, Suite 800 Arlington, Virginia 22209 Project Manager: Dr. Rodney W. Johnson, SRS Technologies Handbook Editors: Dr. Paul A. Penzo, Jet Propulsion Laboratory Paul W. Ammann, SRS Technologies Tethers In Space Handbook - Second Edition - May 1989 Prepared For: National Aeronautics and Space Administration Office of Space Flight Advanced Program Development NASA National Aeronautics and Space Administration FOREWORD The Tethers in Space Handbook Second Edition represents an update to the initial volume issued in September 1986. As originally intended, this handbook is designed to serve as a reference manual for policy makers, program managers, educators, engineers, and scientists alike. It contains information for the uninitiated, providing insight into the fundamental behavior of tethers in space. For those familiar with space tethers, it summarizes past and ongoing studies and programs, a complete bibliography of tether publications, and names, addresses, and phone numbers of workers in the field. Perhaps its most valuable asset is the brief description of nearly 50 tether applications which have been proposed and analyzed over the past 10 years. -
20090015024.Pdf
Wireless Power Transmission Options for Space Solar Power Seth Potter1, Mark Henley1, Dean Davis1, Andrew Born1, Martin Bayer1, Joe Howell2, and John Mankins3 1The Boeing Company, 2NASA Marshall Space Flight Center, 3formerly NASA HQ, currently Artemis Innovation Management Solutions LLC Abstract for a presentation to be given at the State of Space Solar Power Technology Workshop Lake Buena Vista, Florida 2-3 October 2008 Space Solar Power (SSP), combined with Wireless Power Transmission (WPT), offers the far-term potential to solve major energy problems on Earth. In the long term, we aspire to beam energy to Earth from geostationary Earth orbit (GEO), or even further distances in space. In the near term, we can beam power over more moderate distances, but still stretch the limits of today’s technology. In recent studies, a 100 kWe-class “Power Plug” Satellite and a 10 kWe-class Lunar Polar Solar Power outpost have been considered as the first steps in using these WPT options for SSP. Our current assessments include consideration of orbits, wavelengths, and structural designs to meet commercial, civilian government, and military needs. Notional transmitter and receiver sizes are considered for use in supplying 5 to 40 MW of power. In the longer term, lunar or asteroidal material can be used. By using SSP and WPT technology for near-term missions, we gain experience needed for sound decisions in designing and developing larger systems to send power from space to Earth. Wireless Power Transmission Options for Space Solar Power Seth Potter -
Achievable Space Elevators for Space Transportation and Starship
1991012826-321 :1 TRANSPORTATIONACHIEVABLE SPACEAND ELEVATORSTARSHIPSACCELERATFOR SP_CEION ._ Fl_t_ Dynamic_L',_rator_ N91-22162 Wright-PattersonAFB,Ohio ABSTRACT Spaceelevatorconceptslorlow-costspacelau,'x,,hea_rereviewed.Previousconceptssuffered;rein requirementsforultra-high-strengthmaterials,dynamicallyunstablesystems,orfromdangerofoollisionwith spacedeb._s.Theuseofmagneticgrain_reams,firstF_posedby BenoitLeben,solvestheseproblems. Magneticgrain_reamscansupportshortspace6!evatorsforliftingpayloadscheaplyintoEarthorbit, overcomingthematerialstrengthp_Oiemin.buildingspaceelevators.Alternatively,thestreamcouldsupport an internationaspaceportl circling__heEarthdailyt_nsofmilesabovetheequator,accessibleto adv_ncad aircraft.Marscouldbe equippedwitha similargrainstream,usingmaterialfromitsmoonsPhobosandDefines. Grain-streamarcsaboutthesuncould_ usedforfastlaunchestotheouterplanetsandforaccelerating starshipsto nearikjhtspeedforinterstella:recor_naisar',cGraie. nstreamsareessentiallyimperviousto collisions,andcouldreducethecost_f spacetranspo_ationbyan o_er c,,fmagnih_e. iNTRODUCTION Themajorob_,tacletorapi( spacedevei,apmentisthehighco_ oflaunct_!,'D_gayloadsintoEarthorbit. Currentlaunchcostsare morethan_3000per kilogramand, rocketvehicles_ch asNASP,S,_nger_,'_the AdvancedLaunchSystemwiltstillcost$500perkilogram.Theprospectsforspaceente_dseandsettlement. arenotgoodunlessthesehighlaunchc_stsarereducedsignificantly. Overthepastthirtyyears,severalconceptshavebeendevelopedforlaunchir_la{_opayloadsintoEarth orbitcheaplyusing"_rJeceelevators."The._estructurescanbesupportedbyeithe.rs_ati,for:: -
The E-Magazine of the British Interplanetary Society Reaching Beyond the Earth
The e-Magazine of the British Interplanetary Society Reaching Beyond the Earth ne of the most dynamic and System is obsolete almost before it starts. again we look forward to seeing more of exciting areas of current human This is just one of the many fascinating areas these showcases in the future. Also, John Oendeavour must surely be the which lie at the very heart of this key area of Silvester completes his review of Britain’s aerospace industry. It represents mankind’s the Society’s remit, and which we hope to be first space rocket and I talk about the latest achievements at their very best, and offers exploring in future issues of Odyssey. I am updates with Mars One. hope for the great enterprise of space travel sure that, like me, you look forward to reading to which the British Interplanetary Society Terry’s future speculations. In the next issue we delve into the strange aspires. and murky world of conspiracy theories, Also in this issue we are very pleased to with a short story and Richard’s Radical For that reason, I am delighted to introduce have a short story entitled “Shadows” from Vectors column devoted to this endlessly a new occasional column of “Aerospace Stephen Baxter, the well known author and fascinating subject. Richard will also be Speculations” to Odyssey which focuses BIS member. We are hoping to have a series telling us more about Alex Storer’s artwork, on this area of activity, written by our of these 500 word short stories from other and is writing an article about Alex’s latest own Assistant Editor Terry Don with his authors in due course. -
The Electromagnetic Drive: an Equilibrium Between Forces at the Geostationary Orbit of Jupiter
The Electromagnetic Drive: an equilibrium between forces at the geostationary orbit of Jupiter Alberto Caballero1 Abstract: In this research note it is proposed how the equilibrium between the Lorentz force and the centrifugal force in a crewed spacecraft acting as a tidally stabilised skyhook, and orbiting the geostationary orbit of Jupiter, could prevent the spacecraft form deorbiting and reaching unbearable accelerations. A pair of superconducting electromagnetics would produce a constantly-increasing Lorentz Force, which would cancel the centrifugal force while producing a constant acceleration of 4 g, the limit that a crew could withstand during long periods of time. Key-words: Lorentz force, centrifugal force, electromagnetic propulsion, skyhook, space tether, interstellar travel, speed of light. Space tethers are long cables which can be used for propulsion, momentum exchange, stabilization and attitude control, as well as maintaining the relative positions of the components of a large dispersed satellite or spacecraft sensor system. One type of space tether is the skyhook. Specifically, a non-rotating skyhook is a vertical gravity-gradient stabilized tether. Here I wish to discuss how a balance between the Lorentz force (which would act as the centripetal force) and the centrifugal force could provide a high yet bearable acceleration to a crewed skyhook-style spacecraft orbiting Jupiter at geostationary altitude. The escape velocity of Jupiter is 59.5 km/s. Any spacecraft orbiting at a higher speed would leave the geostationary orbit, and the Lorentz force would gradually weaken to the point of disappearing. A possible balance between forces could be achieved with the proper configuration of a system formed by a pair of superconducting electromagnets, one on each side of the spacecraft. -
Space Colonization Using Space-Elevators from Phobos
Space Colonization Using Space-Elevators from Phobos Leonard M. Weinstein Advanced Measurement and Diagnostics Branch, NASA Langley Research Center, Hampton, VA 23681, USA Phone: (757)864-5543, fax: (757)864-8315, [email protected] Abstract. A novel approach is examined for creating an industrial civilization beyond Earth. The approach would take advantage of the unique configuration of Mars and its moon Phobos to make a transportation system capable of raising mass from the surface of Mars to space at a low cost. Mars would be used as the primary location for support personnel and infrastructure. Phobos would be used as a source of raw materials for space-based activity, and as an anchor for tethered carbon-nanotube-based space-elevators. One space-elevator would terminate at the upper edge of Mars' atmosphere. Small craft would be launched from Mars' surface to rendezvous with the moving elevator tip and their payloads detached and raised with solar powered loop elevators to Phobos. Another space-elevator would be extended outward from Phobos to launch craft toward the Earth/Moon system or the asteroid belt. The outward tip would also be used to catch arriving craft. This approach would allow Mars to be colonized, and allow transportation of people and supplies from Mars to support the space industry. In addition, large quantities of material obtained from Phobos could be used to construct space habitats and also supply propellant and material for space industry in the Earth/Moon system as well as around Mars. INTRODUCTION Numerous papers and books extensively examine the requirement and the potential value to establish a civilization in space and on other planets.