| The distance traveled can be measured by counting the revolutions of an impeller towed behind the vessel or mounted in its hull. |
| The flow of air exits the impeller and enters a vaneless diffuser, where it is straightened out and sent into the scroll. |
| Most of this blockage takes place at the leading edge of the vane or in the middle of the impeller. |
| In the vaned impeller, the fluid undergoes an abrupt acceleration and change of direction as it enters the rotor. |
| The impeller on the water pump was just about gone and the bushing holding it to the shaft was cracked. |
| Almost half of the tiny craft was a fusion impeller, making it the most maneuverable ship in the fleet. |
