Algodoo

The general shape and color are based roughly on a 1967 Hitachi HR-16C narrow gauge diesel locomotive.

This scene aims to mimic an engine with a torque converter using scripts and a bunch of axles.

Things are put together where they seem fit.

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Controls

[W/S] - throttle
[I] - ignition (toggle)
[Arrow Up] - starter
[Arrow Down] - brakes (toggle)
[Arrow Left/Right] - reverser (-1/+1)
[X] - release vehicle

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Other Notes

- The working parts are hidden beneath the vehicle's body. And for some reason, changing their depth could break the scene's engine RPM reading.
- To access the working parts without changing their depth: right-click on the vehicle's body, which is a 34-object group. With the selection still active, change their Collision Layers from A to none, then navigate to the Layers tab inside the Options menu, and uncheck None.
- Most of the scene's script is built into the engine circle (rightmost), output circle (second from the right), and the stretched axle connecting the two, as their custom local variables. Some communicate using global variables (scene.my.*).
- If set the stretched axle's bendConstant to NaN, the engine-output relation acts kinda like a diesel-electric drivetrain.
- The analog-style speedometer reads the RPM of the last (leftmost) of the engine and gears circles; its digital-style counterpart reads its own horizontal velocity.
- It is possible to switch the speed unit: right-click on the digital-style speedometer, and doing so selects a 5-object group. With the selection still active, navigate to their script menu, and look for a local parameter named _unit near the top left. Change its value between "kph" and "mph" with the ""; any other value would result in the texts on the meter turning into a question mark.

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Reference

http://www.algodoo.com/algobox/details.php?id=65689

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Feel free to edit