Water jets
In my childhood library there were many DIY books. One of them, written for young pioneers, described a small setup that demonstrates how jet velocity depends on pressure.
At some point I managed to find three tin cans, cut off their lids, and weld them into a single tube. But for some reason the project never went any further. I can’t recall the exact cause. Most likely I failed to make the seams perfectly watertight, and the perfectionist inside me didn’t allow the experiment to be finished. Which is a pity — now I understand that the setup was literally one step away from completion, and the seams didn’t need to be completely watertight in the first place.
The column survived for decades, but after many moves — including our recent relocation to Yerevan — it was lost for good. Now, with a 3D printer at hand, I want to recreate this toy. So far, however, there are no real photos of the device.
The picture at the beginning of this article is pure neuroslop. What exactly is wrong with it? Share your thoughts in the comments.