Encyclopedia Astronautica
1969.06.03 - Engineering evaluation of Apollo 10 launch vehicle

The early engineering evaluation of the Apollo 10 launch vehicle, Saturn V AS-505, indicated that the major flight objectives were accomplished.

Indications were that all detailed test objectives were also accomplished.

The basic performance of the Saturn V was satisfactory, but the following problem areas were identified for more extensive investigation:

- The S-IVB stage auxiliary hydraulic pump performance degraded during S-IVB second burn. The hydraulic system cycle after second burn also indicated degraded pump performance.

- Astronauts reported low-frequency lateral and longitudinal oscillations throughout the S-IVB first and second burn, with high-frequency vibration superimposed beginning at 4 minutes 40 seconds into second burn and continuing until engine cutoff. While the associated amplitudes of both high and low frequency were well within structural and component vibration qualification levels, a priority effort to identify the source of these vibrations was under way.

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