/diy/ - Do It Yourself

>>1572669
You rang? First figure out what design you want to go with and make a list of all the components you need to make it work. Draw doodle sketches until you have a basic design thought up.

Make a list of the calculations you need to make the components, for instance the pressure vessel on pic related requires hoop and longitudinal stress for thin walled pressure vessels and a fatigue calculation (I used asme ellip.).

Next I needed shear on my braze joints to verify they would hold with my factor of safety. The next calculations were thick walled pressure vessel calculations for both cylinders. Next I had to ensure both pistons would not buckle or yield when in either compression or expansion. Next I had to do heat transfer into the boiler to ensure the burner could boil the water, and heat transfer out of the system to ensure the surface area isn't too large. Then a thermodynamic analysis to ensure that I could generate steam at a fast enough rate to cycle the engine and generate torque at the output shaft.

To be fair, my engine is a phone charger, and assuming 100% thermal efficiency it would still take like 30 hours to xharge my phone, so its a shit design but technically it will work.


Of course, you can always buy plans for an engine model that someone else designed, but that really wouldn't be /diy/ then.

Hi guys I'm the tard with the crapped out atlas lathe that is building a small steam engine, I have more questions