0

Horizontal Scotch Yoke Steam Engine

Last night on the show+tell, I talked about the little steam engine I built last fall. It’s a horizontal single-cylinder, 1cc displacement, with a scotch yoke drive mechanism. It’s a combination of manually-machined and CNC-machined parts from aluminum and brass stock. Everything but the mounting bolts, the shaft bearing, and the scotch yoke dowel pin were made by me. It runs at about 3500RPM at 30 psi. Below is a short video I made of it running:

You can also check out this little stop-motion vid I did of the drive mechanism:

Finally, if you want to learn more about how scotch yokes work, and see how they differ from the typical crank arm and connecting rod linkage, you should check out this excellent demo at Wolfram Research, which illustrates the accelleration and velocity curves of each.


Join 6,000+ makers on Adafruit’s Discord channels and be part of the community! http://adafru.it/discord

CircuitPython in 2018 – Python on Microcontrollers is here!

Have an amazing project to share? Join the SHOW-AND-TELL every Wednesday night at 7:30pm ET on Google+ Hangouts.

Join us every Wednesday night at 8pm ET for Ask an Engineer!

Follow Adafruit on Instagram for top secret new products, behinds the scenes and more https://www.instagram.com/adafruit/


Maker Business — Aquarium troubles: the cost of iteration and troubleshooting with a manufacturers abroad

Wearables — Plastic gem know-how

Electronics — Counting Pin Numbers

Biohacking — Exploring Our Inner Reality : Entopic Visions

Python for Microcontrollers — CircuitPython 3.0.0 Release Candidate 0 released!

Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at AdafruitDaily.com !



6 Comments

  1. adafruit_support

    Nice work John!

  2. Wow, very clean and professional. Well done!

  3. Great work on this!

  4. Nice John!!! Excellent work!

  5. that second vid would make a cool gif

  6. Thanks, everybody! 🙂

Sorry, the comment form is closed at this time.