Algodoo

Amazed by the surge in interest of my 1m scale Ross engine w/ Gears (which I consider one of my worst gear boxes), I've gone and downscaled my Agrellan engine; as features in the Triaros, and 10m w/ Gears version, to the 1m scale, which is evidently the most often used scale for vehicles. (Realism, eh?).

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Controls:
For Clockwise output, tap Q.
For Anti-Clockwise output, tap A.
To stop the engine, press Z.

Effectively has 15 gears; 3 sets of 5.
Press R for Low set,
Press G for Mid set,
Press F for High set.

Gears are cycled on from 1-5, and are all on Toggle; be sure to deselect the current gear before changing.
[And that applies to changing sets aswell].
[Also, F-4 and F-5 see the gear train resonate; simple thing to do is not bother with those 2 gears]

Connect the Green output disc to a drive train or something, and you'll be good to go.
- Do note, however, that this scene is in 230 Hz. You will need to weaken the piston springs if you want to run at a lower frequency.