Engines > Your Own Design
Chris's Worthington Brewery Pump
cnr6400:
:ThumbsUp: :ThumbsUp: :ThumbsUp: :popcorn: :popcorn: :popcorn: Liked the 4 x 4 sub video! That was working remarkably well. Flt Lieutenant Pyle Ott in the bubble cockpit has got the hang of it already. :cheers:
crueby:
--- Quote from: cnr6400 on August 12, 2025, 06:21:21 PM --- :ThumbsUp: :ThumbsUp: :ThumbsUp: :popcorn: :popcorn: :popcorn: Great to hear the Worthington pump build is starting! I'll send out the screamin Jimmy dump truck again with another 8 ton load of premium white kernel popcorn... :popcorn: :popcorn: :popcorn: The exhaust pipe is still loose, so you'll hear it several miles out.... :Lol:
With the shop elves recovering from their latest ethanol exploits, it might be a fine time to test your new cymbal set! or the air horns from a GP9 locomotive... :Lol :LittleDevil:
--- End quote ---
Oooh, air horns... yeah... I forgot about the row of steam whistles in the engine room too... :LittleDevil:
crueby:
--- Quote from: cnr6400 on August 12, 2025, 06:27:06 PM --- :ThumbsUp: :ThumbsUp: :ThumbsUp: :popcorn: :popcorn: :popcorn: Liked the 4 x 4 sub video! That was working remarkably well. Flt Lieutenant Pyle Ott has got the hang of it already. :cheers:
--- End quote ---
What you couldn't tell in the video was that the steering channel on the transmitter was reversed, so during the video, left on the stick made it turn right! Flipped the switch on that after the initial run!
crueby:
As mentioned in the first post, last week I did some experiments with the piston ring setup for the pump before heading off to Indy for the weekend. I obtained a few off-the-shelf cast iron piston rings, also dug out some scrap bronze and brass pieces to test things with. The iron rings would work, but are too narrow so would have to put two side by side to cover the port properly. Thats do-able, though not as great with the brass cylinder.
Other experiment was with the bearing bronze for the rings. I turned a couple rings to test with, as well as a section of 'cylinder' to fit it to. The bronze was turned to size, guessing at the thickness at first, and trimmed it to the width shown in my CAD model. You can see the 'port' in the cylinder wall for it to pass over, as well as the two piece piston head and the piston rod in this picture:
The shop elf trainee took some notes on the dimensions of things, including the ring diameters before and after cutting the ring with a jewelers saw:
His notes:
The shop elves took over at that point and got the ring fitted to the cylinder. The ring and bore were trimmed so that the ring would just fit in, with the gap just closed for a good seal.
then assembled the piston
and test fit it to the cylinder. Fits well, seals well - I could blow in the open end of the cylinder and move the piston. When covering the port, nothing leaked out there at one-lungpower-psi.
The piston/ring move smoothly, no scraping or galling on the cylinder, so I think I have a setup that will work for this engine when running it off the compressor. The actual piston bore will be larger for the model, but this was a good proof of concept test.
Kim:
Wonderful! Another great Crueby build! :popcorn: :popcorn:
Looks like you had fun at the sub meet! And your little pond crawler looks like it was a lot of fun.
Kim
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