My Oval Engine Now Fires At Will! Major Milestone For DIY Oval Rotary Engine 2.0
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I present to you the travelling combustion chamber oval rotary engine 2.0! A.k.a. TCCORE 2.0, great acronym right?
And this thing is leaner and meaner than ever!
First up is the anatomy, and finally we have an engine that rotates without much resistance….unlike my previous design.
For the previous design I cut my seals by hand like a caveman, and that’s because I didn’t know something that most of my comments section did - you can 3d print TPU, aka thermoplastic polyurethane aka rubbery stuff with a high temperature resistance that’s great for seals! That’s why all the seals on this engine have been 3d printed on my Bambulab H2D printer, in fact, save for the little springs in here the entire engine is 3d printed.
But this time around I didn't use basic filaments for the engine parts. I used the most expensive and the most badass filament Bambulab has to offer. PPS-CF, that’s Polyphenylene sulfide infused with carbon fiber. PPS is already in itself an engineering plastic which is resistant to high temperatures, solvents and most other chemicals. When you add carbon fiber into the mix you get a filament that’s an absolute powerhouse in terms of pretty much every property you can think of.
The only downside of this fiber is that it’s very brittle, so this engine is actually made from the most flexible and the most rigid filaments out there, which I think is kinda cool.
Today I managed to achieve massive progress and an important milestone no matter how you look at it. I went from a metal engine that did absolutely nothing to a 3d printed one that fell apart after 3 combustion events and now to a 3d printed one that can do combustion at will and occasionally thinks it's a flamethrower and obviously it can survive all of this easily without melting or falling apart.
Obviously, none of this would be possible without my Bambulab H2D which is capable of printing these very very impressive materials and is capable of achieving very accurate tolerances 100% consistently. I'm genuinely thankful that I live in a time when it's possible to do projects like this on a DIY level because outsourcing this would cost a fortune. A capable 3d printer is an incredibly cost effective and time saving approach because I have gone through dozens of ideas and seal dimensions and designs and rotors until I got to this stage. Having someone else make it for you and ship every version to you would not only be terribly expensive but would also take forever.
I also want to thank all of you for all of your useful input and ideas. I'm very new to 3d printing and I wouldn’t know you can print TPU without your comments. That being said you can't really print TPU just like that. I tried. Here's tpu without drying the filament and here's TPU with the filament dry. Fortunately, one of mt viewers sent me a very nice email where he taught me a lot and also told me about the Bambulab AMS HT…this is the secret sauce in my formula. It's fully integrated into the bambulab ecosystem so you just plug it into the printer, load the filament, it automatically sets the time and temperature and even rotates the filament while drying to achieve consistently perfect results every time.
And finally why is this new version called an Oval rotary engine and why is the previous version an eliptical rotary engine? Don't they look the same? Well yes, they do, but mathematically they are very different. An elipse is defined by only two lines. The major and the minor axis. An oval is any closed rounded shape. It can be an egg or an elipse or anything similar. So all elipses are ovals but not all ovals are elipses. This is not an elipse. This is an artificial shape. I created it by extending lines from the midle and then creating a spline. The benefit of this shape is that it reduces friction because it makes for a smoother and easier travel path for the seal. I implemented this already on my rotary vane and sure enough I noticed it when I traced the video. It's just one of the many details hidden inside this engine that I will cover in the next video
A special thank you to my patrons:
Daniel
Zwoa Meda Beda
valqk
Toma Marini
Cole Philips
Allan Mackay
RePeteAndMe
Sam Lutfi
Cakeskull
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