The SPS engine is mounted on gimbals and can be aimed so that its thrust vector (the direction in which it pushes) acts through the spacecraft's centre of mass. Systems: The burn would be made using the large SPS (Service Propulsion System) engine at the rear of the Service Module, under the control of the Guidance and Navigation system.Instead, the burn would set the spacecraft on a precise trajectory for return to Earth.
Purpose: This PAD is for a small contingency burn in case the crew decide not to enter lunar orbit.At 34 hours, 48 minutes this is Apollo Control, Houston. However, we would anticipate if activities move along as they appear to be at this point - we are somewhat ahead of the Flight Plan - that perhaps again tonight we would be able to get the crew into their rest period and sleep period a little bit early. That will begin, according to the Flight Plan, at about 37 hours Ground Elapsed Time. This will be a very long rest period tonight scheduled 10 hours. During the next hour or so, the activity here in Mission Control will be revolving around getting the crew set up for their rest period and eat period. They reported that the cables had been checked and appear to be long enough to take them into the Lunar Module.
#Xstand apollo 11 tv#
During the TV transmission, the crew advised that they may possibly be able to take the color television camera into the Lunar Module with them tomorrow at about 56 hours, 30 minutes Ground Elapsed Time. Apollo 11 is presently 131,000 nautical miles from Earth, traveling at a speed of about 4,300 feet per second. This is Apollo Control at 34 hours, 46 minutes.
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