4,500RPM Air Engine

The first 100 people to use code STANTON will get 60% off of Incogni: incogni.com/stanton

The sound of that twin cylinder was mighty impressive Tom

Tom's air engine project has been hands down my favourite home-made science video series to follow on Youtube for years. This thing started as a curious fun project and is slowly turning into a slick usable design

I love the twin cylinder that you built. I want to see you build a 6-cylinder radial engine just for the heck of it. Would sound amazing!

It's only a matter of time before Tom creates an air powered V6

I work in bottle engineering, and part of the test we perform on the samples we make is a burst test. A 300ml bottle for highly carbonated products if well blown, can easily reach up to 15bars before bursting (not that i would reccomend reaching that pressure, as we do it with a proper machine that uses water instead of air). A 1500/2000ml falls a bit short of 12bars. Anyway. Beware that by making the hole on the bottom of the bottle, you are definitely weakening the overall resistance of the base, i would try to pressurize the bottle by adding another valve to the cap instead. Keep up experimenting!

Now make a radial engine version of it with even more cylinders!

Contrats on the video, the quality of your content is insane. As a mechanical engineering student, I realize the amount of hours you put into every single video is absolutely insane. Keep up the hard work! Well keep supporting!

Seeing the huge difference with the last flown design is just insane. Can't believe how far your designs have come

I can’t believe how much more efficient this design is compared to your first. It’s crazy the innovations you’ve come up with for the problems you encounter, true engineering and design

I love seeing your creative approaches to optimizing something so small, the redesigns, and all the quasi-microscopic changes that go into yielding a slightly higher efficiency each revision. This is probably one of my favorite series!

The 10x performance increase is just incredible. Optimisations like that are game changing. I bet you get approached by model airplane manufacturers and stuff soon if not already

I wonder if having the cylinders offset would be a better option than having the curved rods. Traditional aircraft engines as well as BMW motorcycle engines (which I think were actually for aircraft originally) are also built with offset cylinders. With this miniature 3D printed design it might not even make a difference that could be measurable but might make for a good test. With the bore and especially the stroke, the change in curved rods to going with straight rods may show a difference in the torque as well as reduce the friction on the piston walls with the rods parallel to the pistons and cylinder walls and also reduce any air loss due to the pistons riding slightly cockeyed in the cylinders due to the rods being connected to the crankshaft at a small offset distance. Great work, Tom! I really like the content that you present on your channel.

Wow, the progression between all of your pneumatic engines is impressive. I love the simplicity of the mechanical feedback loops, they are so clever! Great videos as always Tom.

We sure have come far in the compressed air engine technology!

OH! I just read your bio and realized that you have a degree in aerospace engineering! I'm a highschool student and this series has really really interesting to me and actually kind of inspired me to look into and go after aerospace engineering once I graduate from high school and I didn't even realize that that's exactly the path that you took lol. Thank you for making this series, it's truly an inspiration to me and I would bet many many others as well.

It’s been really fun to watch the progression of the engines. Keep up the good work, and the content coming.

Your animations are really helpful and high quality, I wish more DIY orientated engineering channels had them

The amount of work behind these projects is simply amazing. Well done!

8:57 I laughed when I heard this. Back when I was 15 I experimented with car valves. I stuck one through the bottom of a returnable pet bottle, and with safety glasses on, just pumped it up till it burst. (Its just PET, it won't shatter like a grenade lol) Turns out it expands at 16!!!bar (232psi) and then just slowly looses air through some cracks. The idea of him being excited at 4bar, and looking scared at 7bar is therefore really entertaining for me.