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Here's next week's video, early for Patrons. This one goes out publicly on Tuesday 27th. 

I really want to make a multi-cylinder version of this, probably with variable valve timing - and have it drive me on some sort of vehicle with cordless leaf blowers or EDFs driving the air.

Files

Previews only

Air Engine - PREVIEW VERSION

I was watching a video from YouTuber Matthias Wandel 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: https://www.youtube.com/watch?v=XRmFAopH80o His downloads: https://woodgears.ca/ You can support me on Patreon, join my Discord, or buy my Merchandise: *************************** Discord: https://discord.com/invite/fc6MedG7eW Patreon: https://www.patreon.com/xrobots Merchandise: https://teespring.com/stores/james-bruton *************************** Other socials: *************************** Instagram: https://www.instagram.com/xrobotsuk Twitter: https://twitter.com/xrobotsuk Facebook: https://www.facebook.com/xrobotsuk/ *************************** Affiliate links - I will get some money of you use them to sign up or buy something: *************************** 10% off at https://www.3dfuel.com/ - use code XROBOTS at the cart screen. Music for your YouTube videos: http://share.epidemicsound.com/xrobots *************************** 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

Comments

Andy Ihnatko

Brilliant! This is the sort of invention that a "crackpot inventor" character in a children's show would come up with. "But Professor...this is totally impractical." "Of course it is. This is just a proof-of-concept. Once I get it hooked up to a leaf-blower...ZOOM!"

ingmar meins

Haha fun version of (Mut-ee-us or Mat-hee-as) design. Sorry hurts my ex-German ears haha ;-)

Steve Coleman-Williams

I wonder if making the valve passages into cylinders or cones would improve things a bit too - i bet your getting all sort of exotic edie currents in them taking away a good percentage of the suction

XRobots

That is possible - I think electronic valves might be good which would give more mechanical freedom

Steve Coleman-Williams

Yea issue there will be the fine tuning with the fly wheel - in principle it is easy, especially with inline pots etc, but there is a reason even modern ICE cars still use timing chains and not just ECUs

XRobots

It would probably need an encoder at least, Tom Stanton did an air powered bike like that.

Steve Coleman-Williams

What about a dual "cylinder" one? Not withstanding my previous comment about timing etc

XRobots

I think more cylinders is the next plan - the next one 90' out of phase since they are both two stroke, then any more 45' and 135' (?)

XRobots

It would do well on YouTube if it was - I don't know that much about engines, so it'll take some thought.

Steve Coleman-Williams

They are pretty simple engine to be fair the difficulty would be what in petrol terms is the compression and expansion strokes are simultaneous - and on opposite sides of the engine https://www.youtube.com/watch?v=pCteBhr4dGY the first part of this video explains it really well. Things to note are the cavity is loosely a fat figure of 8, and there are always 3 chambers Would be good for youre use as in relation to their size they are pretty powerful