The first part of the centrifugal impeller looks very similar to an axial compressor. The jet pump featured a stainless steel impeller. The compressor is made up of an impeller, a diffuser and a volute housing. This first part of the centrifugal impeller is also termed an "inducer". Propellants are fed via a single shaft, dual impeller turbo-pump. The rotating assembly of blades and hub is known as an "impeller", "rotor", or "runner". A small shaft would break after the impeller pump froze. Propellants are fed via a single shaft, dual impeller turbopump. In a pump, cavitation will first occur at the inlet of the impeller. The strip was rotated inside a cylinder by a tin impeller above a candle. This ratio becomes 1.0 for a true axial flow impeller. The intake system and supercharger impeller were also redesigned. The coolant was expanded through the upper impeller where it lost pressure, boiled and cooled. In general, agitators usually consist of an impeller and a shaft. Viscous drag on the back surface of the impeller disc causes disc friction losses.