Water pump

The water pump drives from the cam shaft gear at crank shaft RPM.In the full size engine it is large enough to circulate water by centrifical  force, however at the same RPM the small impellor would not move any water.I have made this pump to have a rotor offset in the housing.The rotor will have slots with either sliding tufnol blades or teflon rollers.I will test which works best.This pump will be positive displacement.

The pump body was profiled from 16 mm brass plate by CNC The outlet was part of the profile.The gland and the web were attached by silver solder.Great care was needed to accurately measure the positions of the outlet ,the offset of the shaft from the timing case to mounting flange on the side of the engine and finally the height of the shaft above the top of the engine.From these dimensions the diameter of the pump was determined.

The outlet was made round by a second setup using CNC.The final shape was hand filed.

The aluminium block will be made into the distributor.