Main engine
Surveyor's main rocket engine nozzle sits outside the propulsion module on the end opposite the equipment module. When fired during major maneuvers, this engine will provide a thrust of 659 Newtons. If applied at sea level, that amount of force would be strong enough to suspend a 148 pound person in mid-air.

The main engine derives its power by burning a combination of nitrogen tetroxide (N2O4) and hydrazine (a derivative of N2H4). Engineers working on the project call this chemical combination "hypergolic." This term refers to the fact that the two chemicals will spontaneously combust when they come into contact with each other. In other words, no spark is needed to ignite the engine.
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(From NASA)