time: 115 s Diameter: Length: Propellants: Nitric acid/UDMH Engines: Aerojet AJ10-37 Stage Number: 3 - Vanguard 3 Mass: Empty Mass: Thrust (vac): Isp: Burn time: 31 s Isp (sea level): Diameter: Length: Propellants: Solid Engines: Grand Central 33KS2800 See also Vanguard 1 Satellite Vanguard 2 Satellite Vanguard 3 Satellite Explorer program Sputnik program Viking rocket Comparison of orbital launchers families Comparison of orbital launch systems References Further reading Green, Constance, and Lomask, Milon, “Vanguard A History,” SP-4202, National Aeronautics And Space Administration,Government Printing Office, Washington D.C., 1970 Foerstner, Abigail M., “James Van Allen: The First Eight Billion Miles ,” University of Iowa Press, Iowa City, Iowa, , 2007 McDougall, Walter A., “..the Heavens and the Earth: A Political History of the Space Age,” Basic Books, New York, , 1985 Sheehan, Neil., “A Fiery Peace in a Cold War,” Vintage Books, New York, , 2009 Stehling, Kurt r., “Project Vanguard,” Doubleday & Company, Inc., Garden City, New York, Library of CongressCatalog Card Number 61-8906, 1961 Sutton, George P., “History of Liquid Propellant Rocket Engines,” American Institute of Aeronautics and Astronautics, Reston, VA, , 2006 External links Vanguard - A History - NASA SP-4202 online The Vanguard Satellite Launching Vehicle: An Engineering Summary - NASA (PDF) Free paper models of Vanguard rockets From Robert Goddard to Vanguard. 1956 in spaceflight 1957 in spaceflight 1958 in spaceflight 1959 in spaceflight Project Vanguard Rockets and missiles Space launch vehicles of the United States Microsatellite launch vehicles Articles containing video clips