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I recently completed a 3d printed double acting steam engine with my Creality printer. Other than a couple issues with tolerances (probably due to using mixed filament types, PETG and PLA+), I believe it turned out very well. Credit to the designer palexander609 distributed for free on...

I hope this is the right portion of the forum for my post, if not, please forgive me! I had a need for 4140 pre-hard and thought I had found a chunk on eBay, at least that’s what they listed it as. I’m quite a newbie when it comes to steel composition, and when the piece arrived, it is marked...

I found a very interesting addition for my HF Mini Mill that's especially useful. It is a crank handle to be used on the fine downfeed when boring, and is all 3D printed, making it cheap and easy for anyone with an FDM printer. The initial G Code was ginned up for a Prusa printer, and as I...

I decided to build Rudy’s Pioneer and started up with the materials at hand. Since I had a piece of nice DOM seamless tubing, I thought I’d start with that, even though it’s 1 1/4” ID instead of the plan callout of 1 1/8” ID. I heat shrunk and pressed an aluminum sleeve for the cooling fins...

After completing my Webster build, I have started my next engine, Rudy’s Pioneer. As a 2-stroke, I noticed that his design does not provide for a top-end oiling system, relying instead on a traditional 2-stroke gas/oil mix for fuel-lubrication. I’d like to build the engine to run on propane...

Hi, and first off, forgive my ignorance! I just completed a Webster that’s been an on and off project for a couple years due to family issues. I tried to make the carb listed in the plans, but had absolutely no success in getting it to work so I went to a Traxxas RC carb like many others have...

I love the gear driven action of Elmer's #5, but I wonder if it could be scaled up and/or redesigned as an IC model instead? Lots of movement, interesting mechanicals, potentially a hit and miss? Twin flywheels, ball Governor, anything else to overly complicate an already difficult build? Just...

Well, I guess I posted my original article in the wrong area, so I’m sorry if this is considered a repost, but after all, I am a newbie! I promised a Stirling engine to my 7 year old grandson so he could take it to school and share with his classmates. He’s very interested in the principles...

I promised a Stirling engine to my 7 year old grandson so he could take it to school and share with his classmates. He’s very interested in the principles that allow a Stirling engine to operate, but being that he just turned 7, and I don’t think it’s safe or prudent to allow a 7 year old to...

I was perusing fleabay and this caught my eye. More pics here...