Recent content by GreenTwin

That is a cool feature. .

There was a glitch over the holidays with the hosting company that got ironed out (that is my understanding of it; I am not affiliated with that site). Perhaps they will get things worked out again. I have added a considerable amount of foundry material here, just so that it will be spread...

Yikes, just when I was starting to feel that I had some sort of casual understanding of it all. . Edit: I have noticed in some industrial applications that you can get unexpected fluid and gas flow, stratification, etc. due to the momentum of the fluid or gas. I have noticed uneven flow inside...

I think much of the old steam engines (cylinders, etc) were cast in gray iron. I am not sure about things like one-piece pistons, crankshafts, connecting rods, etc. They made steel earlier than I thought (according to one source), but I am not sure when it came into normal production for engine...

As others have mentioned, there can be a great deal of difference between a calculated hypothetical maximum temperature and actual operating conditions, where many things can reduce the temperature inside the cylinder. Hypothetical calculations are just that, hypothetical; ie: not real-world...

Looking through prints in the old books, there is no consistency in piston design, but the one-piece domed design does seem to be commonly used on some engines. Perhaps used on high power marine engines such as Naval engines to keep the weight and reciprocating mass to a minimum. The domed...

Looks like a great start. .

Welcome to the forum. I am sure someone can identify that gearbox for you. .

Obviously we have an open public forum here, and so anyone/everyone is welcome to comment on a topic. If someone wants to have a private conversation with another member, we have a private message system for that purpose. .

Cretors made the original popcorn engines for their popcorn/peanut wagons in the late 1800's and early 1,900's. Bob Pearson in Kansas obtained the original Cretors patterns from the factory in Chicago, perhaps in the 1980's, and he made new Cretors No. 01, 02 and 06 castings from the original...

Atmospheric pressure is about 14.7 psi. For the first line, if the "compression ratio" is 6:1, then that is the reduction in the volume inside the cylinder when the piston travels from bottom-dead-center to top-dead-center. The pressure difference is the difference between the pressure inside...

Best watched with the closed captions turned on.

Good atomization of fuel is more complex than one may imagine. From a white paper by a Delvan burner nozzle engineer, smaller atomization does not necessarily make for a hotter or cleaner burning fuel. And as I recall, higher viscosity fuel has a higher flow rate through the same nozzle as...

A Coles Cretors kit I suppose ? Very nice looking kit. .

I think all of Find's engines are barstock construction. In my opinion, I think Find gives plenty of good information about what he did, and how he did it, and more information that I would normally expect from many/most model diesel engine builders. I think Find is a bit of a freelance type...