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I designed that pump about 20 years ago and the company went bankrupt since then. I don't have access to any of the design files anymore. A quick search and the actual gerotor manufacturer was Nichols-Portland which is one of the many divisions of Parker-Hannifin. I remember they published a...

Looks similar to a gerotor. I designed a hydraulic pump once using one of these. I was trying to get 1000psi. Only when I started violating the recommended tolerances did it put out the required pressures. Strangely, I had to put in more clearance than what was recommended by the gerotor...

Is there some engineering subject that you don't know?!?!?! Anyways if I read your comments correctly, you're saying the inrush of air when the intake valve opens is the cause of the noise. I can see that because it will take a certain pressure differential to counteract the spring tension on...

I agree with your assessment when working with check valves. But think of an industrial scroll compressor. That type of compressor has no valves. In my proposed design, each cylinder inlet stroke takes in .31 cu-in of air which equals .0021 moles. Those .0021 moles are then pushed into the...

Yup, very quiet indeed. It sounds like most remaining noise is from the motor. Yet, the more I think about, I want the satisfaction of designing and building my own design. This is more for validation of my ideas that anything else. Thanks, ...Ved.

This short video is showing where the design for the air compressor is going.... P.S.: I realized that my inlet air porting is faulty in the CAD rendering. I'll need to think a bit more about it....

For a week or so, I've been working in the CAD system to flesh out the next, and what I think is the largest source of air compressor noise: Check Valves. A cheap, loud, single cylinder air compressor has two check valves. One for and inlet on the cylinder's "suck" stroke and one for air exit...

I'd say my end goal is another project. I already have an air compressor from California Air Tools and it's one of the quietest on the market. My first compressor (circa 1998) was a "5hp" Craftsman direct drive. It put out loads of air, but damn was it LOUD! I'd guess around 90 dBa. Several...

Next up in the design process is to figure out what I can expect from a motor selection. I want the pump to have the ability for an output pressure of 120psi. I want to use a commonly available compressor duty motor that runs at a relatively low speed. Also, I don't want to exceed most US...

Now that the Dancer Engine is complete, I'm starting to think about my next big project: I'm going to attempt to build a quiet air compressor. I have some ideas, but first of all, one of the goals is to minimize the air pulses (chuffing) coming out of the pump. Note that this is pure...

David (aka Grasshopper or Davidyat) was working on a beam engine design by Brian Rupnow. David wasn't able to get it running. He said it's binding somewhere. Being that he only lives six miles from me, he gave me a box with the engine in it for me to troubleshoot and see if I can get it...

I painted the engine, put it on a wooden base and soldered up a "steam" manifold. This puppy is complete. You can get the plans for this engine here: https://www.homemodelenginemachinist.com/threads/veds-dancers-end-engine.34546/ And of course, the final video:

Nice work you do..

I'm far enough on this project that I feel safe to post the design. You can find it on a separate thread here: https://www.homemodelenginemachinist.com/threads/veds-dancers-end-engine.34546/#post-386298 Enjoy. ...Ved.

And finally the solid model (step format, zipped). Enjoy the design. ...Ved.

Ok, this is the last pdf post.

...And even more pdfs...

More pdfs...

This is a continuation of my Dancer's Engine. Because the previous Plans thread was too long, here's a new thread with just the plans. First couple of posts the PDF drawings:

Next step: Disassemble, paint then reassemble: Wooden Base and brass plumbing to finish it out will be the next task. ...Ved.