3 ms·
I do not believe that. 1. I can't find a source that says less than a few nanometers. 2. 300 picometers is roughly the diameter of a helium diatom. The head
by hwillis 8y ago
I do not believe that.
1. I can't find a source that says less than a few nanometers.
2. 300 picometers is roughly the diameter of a helium diatom. The head cannot possibly float through hydrodynamic means if an air molecule can barely even fit under it.
- dogecoinbase 8y agoNeat, you independently discovered why the industry is moving to helium-filled drives.
- cyphar 8y agoBryan Cantrill made this claim in a talk recently[1], and the fly-height is apparently 800 picometers. [1]: https://youtu.be/fE2KDzZaxvE?t=1551 https://youtu.be/fE2KDzZaxvE?t=1551
- blattimwind 8y ago> The head cannot possibly float through hydrodynamic means if an air molecule can barely even fit under it. It can. Since siblings liked airplane analogies, here is another one: Consider the head to be an airplane. It has somewhat wing-similar features which provide a lifting force, but the actual read/write head sits below those features (like, say, a landing gear is below wings).
- Serow225 8y agoThis is correct :)
- the8472 8y agoYou can at least fit several layers of iron atoms into that gap, assuming they're part of the crystal lattice. So the surface does not have to be perfectly smooth. https://en.wikipedia.org/wiki/Atomic_radii_of_the_elements_(data_page)#Metallic_radius https://en.wikipedia.org/wiki/Atomic_radii_of_the_elements_(...