Browse Items (8239 total)

• 

  "July 16th confirmed as definite for Apollo 11."

  News article covering NASA's announcement of Apollo 11's launch-date: July 16th.
• 

  "Five manned Apollo flights scheduled this year."

  News article detailing the planning of five more projects after the successful mission of Apollo 8.
• 

  "Countdown trials start for launch."

  News article detailing how the crew of the Apollo 8 are preparing for launch with a "dry run."
• 

  "Dec. 21 - 4:51 a.m. -One of great explorations of all time begins."

  News article detailing how Apollo 8 is ready for launch and the anticipation surrounding it.
• 

  "Astronaut trio sees 'successful' Apollo 9 mission."

  News article detailing the hope from the Apollo 9 crew that their mission will be a success.
• 

  "Moon brought near by Apollo 8 mission."

  News article detailing the recovery of the Apollo 8 crew after its successful mission.
• 

  "All systems 'go' for liftoff of Apollo 10."

  News article detailing that the final preparations for the lift-off of the Apollo rocket have been completed.
• 

  "Six-engine cluster of the Saturn S-IV rocket."

  A press-release detailing the successfuly firing and the specfic launching information of the Saturn I-V rocket-launch.
• 

  "The significance of parameters affecting the heat transfer to the liquid hydrogen in the Saturn S-IVB stage for the lunar orbit rendezvous mission."

  The Saturn S-IVB stage has a requirement for orbiting around the earth for up to 4.5 hours with approximately 60 percent of its initial propellant remaining at the end of the coast (prior to restart) . Extensive analyses must be performed to insure that this requirement is met. Both the maximum and minimum heat transfer rates are important because the maximum rates affect the hydrogen boiloff losses and thus the initial propellant loading requirements. The minimum rates are important because the boil off gases are used to maintain a minimum axial thrust level by venting the gases continuously through aft facing nozzles. This provides for a settling of the propellant throughout the orbital coast and alleviates the need for periodically venting the tank under zero gravity.
• 

  "Signal distribution in automatic checkout systems."

  This paper deals with several selected aspects of the signal distribution in automatic checkout systems. These are: 1) The use of relay matrices as control elements; 2) The inclusion of self-checking capabilities; 3) Problems of systems integration. These aspects are not unique to automatic checkout systems. However, due to the nature of automatic checkout systems as presently being designed around digital circuitry, they find either fuller or different applications than in other types of systems. Also, while they are on the surface somewhat disconnected in nature, they tend to interrelate during the implementation of an automatic checkout system.