Hi Folks,
I have noticed that some commercial model engine suppliers (E.G. Hemmens and Monahan) have water pumps driven directly from the crank shaft. They also have the valves arranged in a horizontal manner.
In all the Model Engineering mags, water pumps are usually geared down to 4 or 5 to 1 to avoid innefficiency, I believe, and the valve boxes are always vertical so that there is a degree of ‘gravity assist’ to valve seating.
If anyone is using plant with these characteristics, I would be interested in their experiences of performance and reliability.
Thank you, All the best, Fred Graham