On the Apollo spacecrafts, what did the Service Module Reaction control subsystem quad do?

elburcher

The system provides the small velocity changes required for service propulsion subsystem propellant settling maneuvers (ullage). Only roll axis control is provided during service propulsion engine thrusting. In addition, it provides velocity changes for spacecraft separation from the third stage during high altitude or translunar injection abort, for separation from the boost vehicle after injection of the spacecraft into translunar trajectory, LM rendezvous in lunar orbit, and for CM-SM separation. http://www.thebest.net/jduncan/asnr/p147-158.htm Aug 01 02, 1:48 AM

Kainantu

It was used to carry out ullage requirements, perform stabilization maneuvers during flight and to separate service and command modules prior to reentry. The unit had sixteen small rocket engines which were arranged in clusters of four, hence the name quad. Propellants were nitrogen tetroxide and hydrazine 50/50 Each engine was 14 inches long,the largest diameter being six inches. Each engine weighed 5 pounds and had a had a thrust of 100 lbs. Aug 01 02, 2:09 AM