Редактирование: Molecular Machinery (раздел)

===SRG-III Gear Train===

{{MolmacExtended
| Image = SRG-III Gear Train.gif
| Author = Mark Sims
| Date = August 31, 2005
| ComponentNumber = 4
| AtomNumber = 15,342
| Width = 11.3 nm
| Height =  7.5 nm
| Depth = 5.6 nm
| Other =
'''Gear Ratio''': 13:6 <br>
'''Speed Ratio''': 2.167:1
| FileName = SRG-III Gear Train
| Extension = mmp
}}

The SRG-III is the third parallel-shaft speed reducer gear created by Mark Sims. A hybrid of the SRG-I and SRG-II, it is the first molecular gear train ever designed. With 15,342 atoms, the SRG-III is the second largest nano-mechanical device ever modeled in atomic detail.

The animation loop in the infobox shows a segment of a molecular dynamics simulation that took almost 31 hours to complete on my Dell laptop. I've hidden the atoms in the front-top half of the silicon carbide casing to expose the gear train.

The rotary motor (not shown) is connected to the largest gear and has the following parameters:

* Torque: 10 nN-nm
* Initial Speed: 0 GHz
* Final Speed: 100 GHz

I used the following parameters for this simulation:

* Frames: 1100
* Steps per frame: 10.0 femtoseconds
* Temperature: 300

This animation loop shows the casing displayed in tubes mode.