I guess everybody already knows this, but I just learned that they intend to launch all LM’s with air rather than oxygen in the cabin. As a result, the spacecraft never sees an oxygen environment with pressure greater than about 6 psi. Furthermore, no testing is done on any of the systems with pure oxygen…
Month: July 1967
Notes from ASPO Manager’s staff meeting – July 24
I hope I didn’t hurt your feelings by going to George Low’s staff meeting instead of yours, but he specifically asked me to come and I felt you would agree that would be best. If not, please advise. I did pick up a few items that may be of interest to you which it is…
Landing point dispersions given communication loss in lunar orbit
During Chris Kraft’s staff meeting of July 17 there was a long discussion regarding the necessity of a beacon to help the recovery people find the spacecraft. It was pretty well concluded that it was not needed as long as we knew where the spacecraft landed to within several hundred miles. Of course, if the…
Spacecraft computer program flow chart status
Just a note to you oats who are interested in flow charts for the spacecraft computer programs. MIT has had a small group headed by John ?enize who have done what appears to be an excellent job of establishing standards to be followed in the development of flow charts. A group of SDC people have…
Greater dispersion at entry on AS-501 with the new IMU
You have expressed concern about the somewhat poorer performance of the new platform in Spacecraft 017. While at MIT last week Dan Lickly and I spoke to John Miller about this. John says the component which contributes the most to dispersion in flight path angle at the entry interface is the Y gyro, as you…
There will be no S-IVB ephemeris in the RTCC after separation
We have had a couple of meetings of FCD, FSD, MPAD and IBM people to discuss some of the RTCC computer program requirements for the lunar landing missions. One item coming out of these discussions, which may interest you, is that there is currently no intention of carrying an ephemeris for the S-IVB after it…
Configuration control of the spacecraft computer program for 504 is imminent
This note is to inform you of our current plans regarding final definition of the CSM and LM spacecraft computer programs for the lunar landing mission – Colossus and Sundance. It is anticipated that MIT will mail the complete Chapter 4 of the Guidance System Operation Plan (GSOP) on July 26. This is the chapter…
LMSS RTCC program test documentation needed
This may be a waste of time what with the LMSS on its way down the tubes, but during that review of the RTCC computer programs a few weeks ago it was obvious that the contractor has no intention of providing any test specification or test results documentation. In fact, I am pretty sure their…
We’re gonna’ find out if the PAC is a good substitute for the flight ropes
You re-opened an old concern of ours at the simulator meeting Tuesday and I just want to tell you we are going to take another good hard look at it. I am talking about how we can convince ourselves that the PAC performs in a manner truly equivalent to the flight ropes. As you quickly…
Spacecraft computer storage requirements for restart protection
In response to a question by George Low the other day, I checked into the amount of computer memory used to provide restart protection. On Sunburst, the LM-1 program, almost 1200 words or 4 percent of the total will entirely fill memory, 4 percent would be about 1500 words. Incidentally, 225 words of that 1200…