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Two early types of liquid-fuel, rocket motors.

Two early types of liquid-fuel, rocket motors. Left, the original ARS motor; right, a four-nozzle motor for ARS No. 4 rocket.jpg Lunar Orbiter.ThumbnailsThe Apollo Lunar Hand Tool CarrierLunar Orbiter.ThumbnailsThe Apollo Lunar Hand Tool CarrierLunar Orbiter.ThumbnailsThe Apollo Lunar Hand Tool Carrier

Two early types of liquid-fuel, rocket motors. Left, the original ARS motor; right, a four-nozzle motor for ARS No. 4 rocket.

Thrust stud for fastening to rocket
Blast chamber
Fuel feed
Oxygen feed
Nozzle
Water jacket
Nozzles
Thrust and fuel column attached to rocket
Fuel feed