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I was watching a video from YouTuber @matthiaswandel about an air engine that he built a few years ago. In fact it was a rebuild of an earlier project which he didn’t film, so he made an updated version and made a video about it.
I thought this was really interesting and I wanted to understand how it worked better so I thought I’d build my own version. Matthias sells plans for lots of the things his makes, and he also has software for generating gears, so you should check that out as well as his channel if you don’t already subscribe.
I bought the plans for the air engine which come with lots of photos, plans to cut the parts out of wood, and also a 3D model which is for Sketchup. There wasn’t any indication of how much torque the engine would generate in Matthias’s video and I think I want to make a slightly higher power version, so I’m actually going to redraw all the parts in CAD from scratch.

Matthias's video:    • Wooden air engine build  
His downloads: https://woodgears.ca/

You can support me on Patreon, join my Discord, or buy my Merchandise:
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Discord:   / discord  
Patreon:   / xrobots  
Merchandise: https://teespring.com/stores/james-br...
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Other socials:
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Instagram:   / xrobotsuk  
Twitter:   / xrobotsuk  
Facebook:   / xrobotsuk  
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Affiliate links - I will get some money of you use them to sign up or buy something:
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10% off at https://www.3dfuel.com/ - use code XROBOTS at the cart screen.
Music for your YouTube videos: http://share.epidemicsound.com/xrobots
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CAD and Code for my projects: https://github.com/XRobots

Huge thanks to my Patrons, without whom my standard of living would drastically decline. Like, inside out-Farm Foods bag decline. Plus a very special shoutout to Lulzbot, Inc who keep me in LulzBot 3D printers and support me via Patreon.

HARDWARE/SOFTWARE

Below you can also find a lot of the typical tools, equipment and supplies used in my projects:

Filament from: https://www.3dfuel.com/
Lulzbot 3D Printers: http://bit.ly/2Sj6nil
Bearings from: https://simplybearings.co.uk/
Lincoln Electric Welder: https://bit.ly/2Rqhqos
CNC Router: https://bit.ly/2QdsNjt
Ryobi Tools: http://bit.ly/2RhArcD
Axminster Micro Lathe: http://bit.ly/2Sj6eeN
3D Printer Filament: http://bit.ly/2PdcdUu
Soldering Iron: http://bit.ly/2DrNWDR
Vectric CNC Software: http://bit.ly/2zxpZqv