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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 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