S-IVB manual steering

[Monitoring DOI with the clock] is very crude since it only takes an overburn of 13 fps on a nominal 70 fps DOI to result in lunar impact and this sort of dispersion would occur within two or three seconds at half thrust.
Descent Orbit Insertion (DOI) monitoring and abort procedures are proposedApril 23, 1968Howard W. Tindall, Jr.
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No special spacecraft computer programs are to be developed for AS-208B and AS-503

January 10, 1967 - Howard W. Tindall, Jr. Posted on 24 March 2022 by flight

The decision has bean made by the Apollo Program Manager that unique computer programs need not be developed for missions AS-208B (LM) and AS-503 (CM). This decision was brought about due to concern that effort on these programs would affect development of the main line programs. It is certainly consistent with numerous other actions taken…

Crew familiarization and training for TLI

January 15, 1968 - Howard W. Tindall, Jr. Posted on 12 April 2022 by flight

During our many discussions on the need for command module steering of the S-IVB during TLI, a potential crew familiarization. training problem became apparent. Specifically, even if the P-15 CSM TLI Steering is retained, it is not obvious that it will be possible to make the AMS faithfully reproduce the attitude excursions which may be…