By Tamman Montanaro

Total Page：16

File Type：pdf, Size：1020Kb

4 Reusable First Stage Rockets y1 = 15.338 m m1 = 2.047 x 10 kg 5 y2 = 5.115 m m2 = 1.613 x 10 kg By Tamman Montanaro What is the moment of inertia? What is the force required from the cold gas thrusters if we assume constancy. Figure 1. Robbert Goddard’s design of the first ever rocket to fly in 1926. Source: George Edward Pendray. The moment of inertia of a solid disk: rper The Rocket Formula Now lets stack a bunch of these solid disk on each other: Length = l Divide by dt Figure 2: Flight path for the Falcon 9; After separation, the first stage orientates itself and prepares itself for landing. Source: SpaceX If we do the same for the hollow cylinder, we get a moment of inertia Launch of: Specific impulse for a rocket: How much mass is lost? What is the mass loss? What is the moment of inertia about the center of mass for these two objects? Divide by m Figure 3: Falcon 9 first stage after landing on drone barge. Source: SpaceX nd On December 22 2015, the Falcon 9 Orbcomm-2 What is the constant force required for its journey halfway (assuming first stage lands successfully. This is the first ever orbital- that the force required to flip it 90o is the equal and opposite to class rocket landing. From the video and flight logs, we Flip Maneuver stabilize the flip). can gather specifications about the first stage. ⃑ How much time does it take for the first stage to descend? We assume this is the time it takes � Flight Specifications for the first stage to reorientate itself. Thrust @vac = 7.543 MN Hfirst stage = 40.9 m Assuming constant alpha: Total Mass = 5.135 x 105 kg Burn Time = 102 seconds �⃑ First Stage Mass = 3.975 x V = 1666 m/s cutoff 0 5 With t = 62 sec, � = 90 , and r = 29.53 m 10 kg Hcutoff = 75.5 km Propellant Mass = 3.728 x Orbit = 620 km x 660 km x What is the center of mass? Let us think of the first stage in two parts: a uniform hollow and 105 kg 47o solid cylinder stacked on one another. Assume cold gas thrusters that provide the force to flip Isp @vac = 312 seconds Merlin 1D mass(first stage) = are at a height of 35.8 meters and that the height of separation is 10.23 meters. 4230 kg Source: SpaceX (web, launch video, flight logs).

Copy Link

Recommended publications

GT 1020 Datasheet
HARDWARE • DATASHEET GT 1020 Cellular-based telematics for general asset management applications. Complete visibility of transportation and heavy equipment assets, industrial equipment and more. The compact and versatile GT 1020 is designed to fit a wide range of asset tracking 4G LTE cellular applications across various market segments, including transportation, supply communications chain, heavy equipment and maritime. As part of a comprehensive solution that can include cellular connectivity, sensors and a cloud application, the GT 1020 enables remote monitoring of fixed and mobile assets, and delivers actionable data Integrated antennas to ensure complete visibility of operations and enable informed business planning. Feature-rich Quick and easy installation Future proof your solution with global communications over the 4G LTE cellular network with 3G/2G fallback. The GT 1020 features optional Bluetooth support for wireless sensors plus an intelligent reporting system that optimizes power and Compact and rugged airtime usage by adjusting the frequency of location updates based on vehicle motion. An optional CAN Bus interface enables advanced vehicle reporting, analytics and diagnostics, while a backup battery enables reporting for up to 11 Optional CAN Bus support months (depending on reporting frequency) without external power. The device includes a digital input that can be used to report on status changes, such as tire pressure alarms or whether the vehicle is on or off. Feature-rich and versatile Quick and discrete installation Integrated cellular and GPS antennas and mounting options with VHB tape or Long-lasting screws make the GT 1020 quick and easy to install and remove. Its small size backup battery supports covert installations on smaller equipment and assets to deter theft and tampering.
[Show full text]
Satellite Constellations - 2021 Industry Survey and Trends
[SSC21-XII-10] Satellite Constellations - 2021 Industry Survey and Trends Erik Kulu NewSpace Index, Nanosats Database, Kepler Communications [email protected] ABSTRACT Large satellite constellations are becoming reality. Starlink has launched over 1600 spacecraft in 2 years since the launch of the first batch, Planet has launched over 450, OneWeb more than 200, and counting. Every month new constellation projects are announced, some for novel applications. First part of the paper focuses on the industry survey of 251 commercial satellite constellations. Statistical overview of applications, form factors, statuses, manufacturers, founding years is presented including early stage and cancelled projects. Large number of commercial entities have launched at least one demonstrator satellite, but operational constellations have been much slower to follow. One reason could be that funding is commonly raised in stages and the sustainability of most business models remains to be proven. Second half of the paper examines constellations by selected applications and discusses trends in appli- cations, satellite masses, orbits and manufacturers over the past 5 years. Earliest applications challenged by NewSpace were AIS, Earth Observation, Internet of Things (IoT) and Broadband Internet. Recent years have seen diversification into majority of applications that have been planned or performed by governmental or military satellites, and beyond. INTRODUCTION but they are regarded to be fleets not constellations. There were much fewer Earth Observation com- NewSpace Index has tracked commercial satellite panies in 1990s and 2000s when compared to com- constellations since 2016. There are over 251 entries munications and unclear whether any large constel- as of May 2021, which likely makes it the largest lations were planned.
[Show full text]
FCC-20-54A1.Pdf
Federal Communications Commission FCC 20-54 Before the Federal Communications Commission Washington, D.C. 20554 In the Matter of ) ) Mitigation of Orbital Debris in the New Space Age ) IB Docket No. 18-313 ) REPORT AND ORDER AND FURTHER NOTICE OF PROPOSED RULEMAKING Adopted: April 23, 2020 Released: April 24, 2020 By the Commission: Chairman Pai and Commissioners O’Rielly, Carr, and Starks issuing separate statements; Commissioner Rosenworcel concurring and issuing a statement. Comment Date: (45 days after date of publication in the Federal Register). Reply Comment Date: (75 days after date of publication in the Federal Register). TABLE OF CONTENTS Heading Paragraph # I. INTRODUCTION .................................................................................................................................. 1 II. BACKGROUND .................................................................................................................................... 3 III. DISCUSSION ...................................................................................................................................... 14 A. Regulatory Approach to Mitigation of Orbital Debris ................................................................... 15 1. FCC Statutory Authority Regarding Orbital Debris ................................................................ 15 2. Relationship with Other U.S. Government Activities ............................................................. 20 3. Economic Considerations .......................................................................................................
[Show full text]
Cape Canaveral Air Force Station Support to Commercial Space Launch
The Space Congress® Proceedings 2019 (46th) Light the Fire Jun 4th, 3:30 PM Cape Canaveral Air Force Station Support to Commercial Space Launch Thomas Ste. Marie Vice Commander, 45th Space Wing Follow this and additional works at: https://commons.erau.edu/space-congress-proceedings Scholarly Commons Citation Ste. Marie, Thomas, "Cape Canaveral Air Force Station Support to Commercial Space Launch" (2019). The Space Congress® Proceedings. 31. https://commons.erau.edu/space-congress-proceedings/proceedings-2019-46th/presentations/31 This Event is brought to you for free and open access by the Conferences at Scholarly Commons. It has been accepted for inclusion in The Space Congress® Proceedings by an authorized administrator of Scholarly Commons. For more information, please contact [email protected]. Cape Canaveral Air Force Station Support to Commercial Space Launch Colonel Thomas Ste. Marie Vice Commander, 45th Space Wing CCAFS Launch Customers: 2013 Complex 41: ULA Atlas V (CST-100) Complex 40: SpaceX Falcon 9 Complex 37: ULA Delta IV; Delta IV Heavy Complex 46: Space Florida, Navy* Skid Strip: NGIS Pegasus Atlantic Ocean: Navy Trident II* Black text – current programs; Blue text – in work; * – sub-orbital CCAFS Launch Customers: 2013 Complex 39B: NASA SLS Complex 41: ULA Atlas V (CST-100) Complex 40: SpaceX Falcon 9 Complex 37: ULA Delta IV; Delta IV Heavy NASA Space Launch System Launch Complex 39B February 4, 2013 Complex 46: Space Florida, Navy* Skid Strip: NGIS Pegasus Atlantic Ocean: Navy Trident II* Black text – current programs;
[Show full text]
Project Selene: AIAA Lunar Base Camp
Project Selene: AIAA Lunar Base Camp AIAA Space Mission System 2019-2020 Virginia Tech Aerospace Engineering Faculty Advisor : Dr. Kevin Shinpaugh Team Members : Olivia Arthur, Bobby Aselford, Michel Becker, Patrick Crandall, Heidi Engebreth, Maedini Jayaprakash, Logan Lark, Nico Ortiz, Matthew Pieczynski, Brendan Ventura Member AIAA Number Member AIAA Number And Signature And Signature Faculty Advisor 25807 Dr. Kevin Shinpaugh Brendan Ventura 1109196 Matthew Pieczynski 936900 Team Lead/Operations Logan Lark 902106 Heidi Engebreth 1109232 Structures & Environment Patrick Crandall 1109193 Olivia Arthur 999589 Power & Thermal Maedini Jayaprakash 1085663 Robert Aselford 1109195 CCDH/Operations Michel Becker 1109194 Nico Ortiz 1109533 Attitude, Trajectory, Orbits and Launch Vehicles Contents 1 Symbols and Acronyms 8 2 Executive Summary 9 3 Preface and Introduction 13 3.1 Project Management . 13 3.2 Problem Deﬁnition . 14 3.2.1 Background and Motivation . 14 3.2.2 RFP and Description . 14 3.2.3 Project Scope . 15 3.2.4 Disciplines . 15 3.2.5 Societal Sectors . 15 3.2.6 Assumptions . 16 3.2.7 Relevant Capital and Resources . 16 4 Value System Design 17 4.1 Introduction . 17 4.2 Analytical Hierarchical Process . 17 4.2.1 Longevity . 18 4.2.2 Expandability . 19 4.2.3 Scientiﬁc Return . 19 4.2.4 Risk . 20 4.2.5 Cost . 21 5 Initial Concept of Operations 21 5.1 Orbital Analysis . 22 5.2 Launch Vehicles . 22 6 Habitat Location 25 6.1 Introduction . 25 6.2 Region Selection . 25 6.3 Locations of Interest . 26 6.4 Eliminated Locations . 26 6.5 Remaining Locations . 27 6.6 Chosen Location .
[Show full text]
Ring Road: User Applications on a High Latency Network
User Applications on a High-Latency Network Scott Burleigh 24 January 2014 This research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. (c) 2014 California Institute of Technology. Government sponsorship acknowledged. Outline • An infrastructure proposal: a constellation of nanosatellites using delay-tolerant networking to provide low-cost access • An illustration • Some details: capacity, costs • Application latency in this network • Some applications that would work despite the latency • A perspective on using a network • Caveats and outlook 24 January 2014 2 Satellites for Universal Network Access • Earth-orbiting satellites can relay radio communications among sites on Earth. • Can be visible from all points on Earth’s surface, removing geographic and political obstacles. • Not a new idea: – Geostationary (GEO): Exede (ViaSat), HughesNet (EchoStar), WildBlue, StarBand, Intelsat, Inmarsat, Thuraya – Low-Earth Orbiting (LEO): Globalstar, Iridium, Orbcomm, Teledesic 24 January 2014 3 So, Problem Solved? • Maintaining Internet connections with satellites isn’t easy. • GEO satellites do this by ensuring continuous radio contact with ground stations and customer equipment. But: – They are costly, on the order of $300 million (manufacture & launch). – Each one provides communication to a limited part of Earth’s surface. – Each one is a single point of failure. – While data rates are high, round-trip latencies are also high. • LEO constellations do this by constantly switching connections among moving satellites. – Broad coverage areas, low latencies. – But data rates are lower than for GEO, more satellites are needed, and they’re still expensive: $150-$200 million (manufacture and launch).
[Show full text]
The SKYLON Spaceplane
The SKYLON Spaceplane Borg K.⇤ and Matula E.⇤ University of Colorado, Boulder, CO, 80309, USA This report outlines the major technical aspects of the SKYLON spaceplane as a ﬁnal project for the ASEN 5053 class. The SKYLON spaceplane is designed as a single stage to orbit vehicle capable of lifting 15 mT to LEO from a 5.5 km runway and returning to land at the same location. It is powered by a unique engine design that combines an air- breathing and rocket mode into a single engine. This is achieved through the use of a novel lightweight heat exchanger that has been demonstrated on a reduced scale. The program has received funding from the UK government and ESA to build a full scale prototype of the engine as it’s next step. The project is technically feasible but will need to overcome some manufacturing issues and high start-up costs. This report is not intended for publication or commercial use. Nomenclature SSTO Single Stage To Orbit REL Reaction Engines Ltd UK United Kingdom LEO Low Earth Orbit SABRE Synergetic Air-Breathing Rocket Engine SOMA SKYLON Orbital Maneuvering Assembly HOTOL Horizontal Take-O↵and Landing NASP National Aerospace Program GT OW Gross Take-O↵Weight MECO Main Engine Cut-O↵ LACE Liquid Air Cooled Engine RCS Reaction Control System MLI Multi-Layer Insulation mT Tonne I. Introduction The SKYLON spaceplane is a single stage to orbit concept vehicle being developed by Reaction Engines Ltd in the United Kingdom. It is designed to take o↵and land on a runway delivering 15 mT of payload into LEO, in the current D-1 conﬁguration.
[Show full text]
Development of the Crew Dragon ECLSS
ICES-2020-333 Development of the Crew Dragon ECLSS Jason Silverman1, Andrew Irby2, and Theodore Agerton3 Space Exploration Technologies, Hawthorne, California, 90250 SpaceX designed the Crew Dragon spacecraft to be the safest ever flown and to restore the ability of the United States to launch astronauts. One of the key systems required for human flight is the Environmental Control and Life Support System (ECLSS), which was designed to work in concert with the spacesuit and spacecraft. The tight coupling of many subsystems combined with an emphasis on simplicity and fault tolerance created unique challenges and opportunities for the design team. During the development of the crew ECLSS, the Dragon 1 cargo spacecraft flew with a simple ECLSS for animals, providing an opportunity for technology development and the early characterization of system-level behavior. As the ECLSS design matured a series of tests were conducted, including with humans in a prototype capsule in November 2016, the Demo-1 test flight to the ISS in March 2019, and human-in-the-loop ground testing in the Demo-2 capsule in January 2020 before the same vehicle performs a crewed test flight. This paper describes the design and operations of the ECLSS, the development process, and the lessons learned. Nomenclature AC = air conditioning AQM = air quality monitor AVV = active vent valve CCiCap = Commercial Crew Integrated Capability CCtCap = Commercial Crew Transportation Capability CFD = computational fluid dynamics conops = concept of operations COPV = composite overwrapped
[Show full text]
Potential Applications of the ORBCOMM Global Messaging System to US Military Operations
Calhoun: The NPS Institutional Archive Theses and Dissertations Thesis Collection 1995-06 Potential applications of the ORBCOMM global messaging system to US military operations Coverdale, David R. Monterey, California. Naval Postgraduate School http://hdl.handle.net/10945/31428 NAVAL POSTGRADUATE SCHOOL Monterey, California THESIS POTENTIAL APPLICATIONS OF THE ORBCOMM GLOBAL MESSAGING SYSTEM TO US MILITARY OPERATIONS by David R. Coverdale June 1995 Principal Advisor: Paul H. Moose Approved for public release; distribution is unlimited. 19951226 117 Form Approved REPORT DOCUMENTATION PAGE OMB No. 0704-0188 Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time reviewing instructions, searching existing data sources , gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to Washington Headquarters Services, Directorate for Information Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302, and to the Office of Management and Budget, Paperwork Reduction Project (0704-0188), Washington, DC 20503. 1. AGENCY USE (Leave Blank) 2. REPORT DATE 3. REPORT TYPE AND DATES COVERED June 1995 Master's Thesis 4. TITLE AND SUBTITLE POTENTIAL APPLICATIONS OF THE 5. FUNDING NUMBERS ORBCOMM GLOBAL MESSAGING SYSTEM TO US MILITARY OPERATIONS 6. AUTHOR(S) Coverdale, David R. 7. PERFORMING ORGANIZATION NAME(S) AND ADRESS(ES) 8. PERFORMING ORGANIZATION Naval Postgraduate School REPORT NUMBER Monterey, CA 93943-5000 9. SPONSORING / MONITORING AGENCY NAME(S) AND ADDRESS(ES) 10. SPONSORING / MONITORING AGENCY REPORT NUMBER 11.
[Show full text]
CEO Yusaku Maezawa Announces the Launch of His Art Project, “#Dearmoon” the First Ever Flight of Private Passengers Around the Moon by Inviting Artists
Dear All media related readers September 18th, 2018 Start Today Co., Ltd. CEO Yusaku Maezawa Announces the Launch of His Art Project, “#dearMoon” The First Ever Flight of Private Passengers Around the Moon by Inviting Artists Yusaku Maezawa, CEO of Start Today Co., Ltd. (Headquarters in Chiba city) has announced his art project staged in space, “#dearMoon”, which will be the first ever flight of private passengers around the moon. This was announced at the Space Exploration Technologies Corp (State of California, USA - Hawthorne, from hereon SpaceX), accompanied by its CEO Elon Musk. Maezawa will invite up to eight selected world-renowned artists representing each field to join him on an orbiting flight on SpaceX's super heavy-lift launch vehicle “BFR”, which will fly them around the moon and earth for one week. This is an art project staged in space, which is purposed to have these artists create works of art from their inspiration of this experience of seeing the moon and round earth from space. The project was named “#dearMoon” to express admiration and respect to the moon, which has been such an inspiration to generations of humankind. Maezawa himself will certainly be joining these artists on this first ever flight of private passengers around the moon. The origin of this “project for humankind” came from Maezawa’s hope to “retain works of art 1 / 3 created from the inspiration of these artists who will fly around the moon” with him, for the future generation to admire. Maezawa has always believed that “art can bring people closer together, make them smile, inspire creativity and provide strength.” As an avid art lover and collector himself, he has founded the Contemporary Art Foundation, as well as lending the art work of Jean-Michel Basquiat to museums all over the world.
[Show full text]
ESPA Ring Datasheet
PAYLOAD ADAPTERS | ESPA ESPA THE EVOLVED SECONDARY PAYLOAD ADAPTER ESPA mounts to the standard NSSL (formerly EELV) interface bolt pattern (Atlas V, Falcon 9, Delta IV, OmegA, Vulcan, Courtesy of Lockheed Martin New Glenn) and is a drop-in component in the launch stack. Small payloads mount to ESPA ports featuring either a Ø15-inch bolt circle with 24 fasteners or a 4-point mount with pads at each corner of a 15-inch square; both of these interfaces have become small satellite standards. ESPA is qualified to carry 567 lbs (257 kg), and a Heavy interface Courtesy of NASA (with Ø5/16” fastener hardware) has been introduced with a capacity of 991 lbs (450 kg). All small satellite mass capabilities require the center of gravity (CG) to be within 20 inches (50.8 cm) of the ESPA port surface. Alternative configurations can be accommodated. ESPA GRANDE ESPA Grande is a more capable version of ESPA with Ø24-inch ports; the ring height is typically 42 inches. The Ø24-inch port has been qualified by test to Courtesy of ORBCOMM & Sierra Nevada Corp. carry small satellites up to 1543 lb (700 kg). ESPA ESPA IS ADAPTABLE TO UNIQUE MISSION REQUIREMENTS • The Air Force’s STP-1 mission delivered multiple small satellites on an Atlas V. • NASA’s Lunar Crater Observation and Sensing Satellite (LCROSS): ESPA was the spacecraft hub for the LCROSS shepherding satellite in 2009. • ORBCOMM Generation 2 (OG2) launched stacks of two and three ESPA Grandes on two different Falcon 9 missions and in total deployed 17 satellites.
[Show full text]
The Annual Compendium of Commercial Space Transportation: 2012
Federal Aviation Administration The Annual Compendium of Commercial Space Transportation: 2012 February 2013 About FAA About the FAA Office of Commercial Space Transportation The Federal Aviation Administration’s Office of Commercial Space Transportation (FAA AST) licenses and regulates U.S. commercial space launch and reentry activity, as well as the operation of non-federal launch and reentry sites, as authorized by Executive Order 12465 and Title 51 United States Code, Subtitle V, Chapter 509 (formerly the Commercial Space Launch Act). FAA AST’s mission is to ensure public health and safety and the safety of property while protecting the national security and foreign policy interests of the United States during commercial launch and reentry operations. In addition, FAA AST is directed to encourage, facilitate, and promote commercial space launches and reentries. Additional information concerning commercial space transportation can be found on FAA AST’s website: http://www.faa.gov/go/ast Cover art: Phil Smith, The Tauri Group (2013) NOTICE Use of trade names or names of manufacturers in this document does not constitute an official endorsement of such products or manufacturers, either expressed or implied, by the Federal Aviation Administration. • i • Federal Aviation Administration’s Office of Commercial Space Transportation Dear Colleague, 2012 was a very active year for the entire commercial space industry. In addition to all of the dramatic space transportation events, including the first-ever commercial mission flown to and from the International Space Station, the year was also a very busy one from the government’s perspective. It is clear that the level and pace of activity is beginning to increase significantly.
[Show full text]