Apollo 17 Liftoff from Moon - December 14, 1972

Recent questions

• What is the significance of the phrase "Engine arm is ascent"?

  The phrase "Engine arm is ascent" indicates that the rocket's engines have been activated and the vehicle is beginning its journey into space. This phrase marks the initial stage of the rocket's ascent, where the engines are powering up to propel the rocket off the ground and into the sky.

• What does the term "Pitchover" refer to in rocket launches?

  "Pitchover" in the context of rocket launches refers to the maneuver where the rocket changes its orientation from a vertical position to a slight angle. This adjustment is necessary to ensure that the rocket follows the correct trajectory as it ascends into space. By pitching over, the rocket can start to tilt towards its intended flight path, allowing it to reach its target altitude and orbital inclination.

• What is the significance of the number "308" mentioned in the summary?

  The number "308" mentioned in the summary likely refers to a specific parameter or measurement related to the rocket's ascent. In the context of a rocket launch, numbers are often used to communicate important data such as altitude, velocity, or other performance metrics. In this case, "308" could represent a specific altitude or velocity milestone reached by the rocket during its ascent.

• Why is it important for the "H-dot" to look good during a rocket launch?

  During a rocket launch, the "H-dot" refers to the rate of change of altitude, also known as the vertical velocity. It is crucial for the "H-dot" to look good, meaning that the vertical velocity is within the expected range, to ensure a successful ascent. Monitoring and maintaining a stable vertical velocity is essential for the rocket to reach its intended altitude and trajectory without deviating from the planned flight path.

• What does the term "AGS solid" signify in the context of rocket launches?

  The term "AGS solid" in the context of rocket launches indicates that the Abort Guidance System (AGS) is functioning properly and is ready to be activated if needed. The AGS is a critical safety feature that is designed to guide the rocket to a safe abort trajectory in the event of an emergency during the launch. A solid AGS ensures that the rocket has a reliable system in place to respond to any potential issues that may arise during the ascent phase.