1.5" Scale Nathan Injector Operates Like the Real Thing!

[@rrsteamer]

Very impressive. A very nice piece of work. Having dealt with actual Nathan engineering, this about as real and quality operation without having the “4000” parts that originals had. Yes you obviously could not include everything that the originals had, but what you have made is about as close to the safest method to add boiler water and with ease of operation once properly adjusted. It will be interesting to see after a few years of operation how tight if the steam and water valve seats remain tight and how long a set of nozzles will remain useable before wear or cutting takes. That comes with service problems from conditions. The original 4000s had their problems also. As you may have discovered, in 1948 Nathan had to make a major changes to the bodies due to liming up of passageways and relocation of the jet nozzle within the body. There were other changes made as service conditions were noted and improvements made to suit. Your study of the nozzles engineering to obtain the correct relationship of tapers, diameters and spacing based on steam pressures is very much admired. You are probably aware of how many variations Nathan had to come up with to satisfy different steam pressures, water capacities for the three different sizes of 4000s. Anyway nicely done! C. B. Ahrens

[@jackvandersonJr]

Work of art! Thanks for walking though some trouble shooting steps and explaining what is happening in each case. Always nice to learn a little.

[@metalmill52]

Wow, a working marvel of mechanical beauty!

[@DonCormack]

It would be awesome if you could make a video showing how you calculate the delivery volume related to injector nozzles.

[@kleetus92]

That is absolutely beautiful!

[@glenncerny8403]

Nice. I know what I want for Christmas. :)

[@drjohnmarino]

Really impressive! What is the price on these ?

[@EccentricEngineerYT]

This batch was $1,895 each. If I make more in the future they will likely be a bit higher.