ST-124-M3 inertial platform

[1] It was number 124 in a series of similar devices, including the ST-80 (used in the Redstone), the ST-90 (used on the Jupiter and on early Saturn I flights), and the ST-120 (used in the Pershing missile).

[2] The ST-124 was designed by Marshall Space Flight Center and manufactured by Bendix Corporation, Eclipse-Pioneer Division, in Teterboro, New Jersey.

[1] The ST-124 stabilized platform was part of the guidance, navigation, and control system of the Saturn V. Data from the ST-124 were used by the Launch Vehicle Digital Computer (another Instrument Unit component) to compare actual flight data to programmed flight plans and to calculate guidance corrections.

[3] Frank Cornella delivered the instruments (Gyros and accelerometers) from Teterboro New Jersey to Marshall Space Flight Center in Huntsville Alabama[citation needed].

They generated signals that were shaped in feedback circuits and sent back to torquers on the inner, middle and outer gimbals that exactly countered the rotations, nulling the gyro outputs and keeping the platform stable.

Commands from the theodolite were transmitted via cables inside the vehicle, to torquers in the ST-124 to orient the stable platform toward the correct azimuth.

[clarification needed] Heat generated by torquers and other electrical equipment inside the ST-124 was carried away by cooling coils built into the aluminum covers.