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used CAD (cardboard aided design)
Achim,Sent you photos to an old email address I had for you. Jeff
Long time lurker here!Here are some photos of the cooling towers used by IHC. The one on the right is on a 30-60 tractor and is the same engine as the 50HP stationary you are planning to build.I’m in the debug stage on my rendition of the Doug Kelly design and piston rings and valve seats are not sealing so a rebuild of those items is planned. I chose the stationary version of the cooling system and used CAD (cardboard aided design) to get the size roughly comparable with the engine.
Achim,The water is directed against the screens to either side of the pipes to slow the fall and create a larger wetted surface for evaporation. To create an effective cooler on a much smaller scale I suspect you would have to use a slightly larger scale screen size due to the surface tension of water. Maybe also add a wetting agent to the water. Jeff
Hi Achim.Sorry for the delay in replying - saw your posts last night but I am not very good at typing on my tablet. Thanks also for providing the links regarding valve seating. Re the cooling tower that I made. It is based on photos and IHC brochures of their offerings. I scaled it up to be in sync with the engine. I used a 5/8" thin wall brass pipe slit in half lengthways and soldered in place at the top of the cooler above the outlet pipe which is peppered with small holes on the lower side. The mesh screen goes over the shield and is bent in such a way as to let any water that flows over the screen to fall into the tank. The outlet from the tank is at the bottom and connects to a pump. I am not sure how the scaling effect will prevent the water from going through the mesh due to its surface tension. An experiment with some antifreeze is in order. What I may need is a liquid that behaves like beer - I may even be forced to use some but am not sure of the resulting smell when heated!Jeff - now I see where Doug Kelly might have gotten his version of the tank for his model. Thanks for sharing.Achim - re the preheater. I based it on the tractor engine's system. I haven't yet put in a diverter plate to allow the mixing of the exhaust hot air and ambient but the photo below shows it. On my engine I also used roller tappets as per the second photo.Good luck with your build.Geoff