[AR] Re: Flight Controller Features
- From: "John Dom" <johndom@xxxxxxxxx>
- To: <arocket@xxxxxxxxxxxxx>
- Date: Wed, 13 Jan 2016 17:51:19 +0100
Henry Spencer wrote on 120116:
Apollo computers could and normally did run for whole missions -- many
days -- without rebooting. The reboots during the Apollo 11 landing were
not due to the computer being unreliable; they were due to a human oversight
that resulted in the computer becoming overloaded, as tasks stacked up
during a complex phase of flight. Are such things really unthinkable for
rocket flights today?
Re-reading that part in First Man there were 2 independent guidance
computers in the LM, called PNGS and AGS (abort one). Data from both had to
correspond. They also had a star tracker for gyro platform calibration and a
radar aboard for altitude data. During the Apollo 10 landing rehearsal,
Cernan made a mistake flipping the AGS switch on the wrong moment causing
wild craft oscillations.
jd
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