426 Hemi Working Model Engine (1:6 Scale) - Part 2. It Works!

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Here's my model engine modified to run like a real one, even though is electric. It has a starter solenoid, speed sensor, temperature sensor and a DC motor to move the pulleys and the flywheel.

The idea of this project is to simulate a real engine but with electrical parts, instead of fuel, so is safe to run indoors and is easier to build.

My previous internal combustion engine model was made by hand. Here's the video: https://www.youtube.com/watch?v=B2LqtCjqjEU

My hemi model is much better than my first model, not only in appearance but also in realism.

I took the engine model “Revell 1/6 Dodge 426 Hemi Street Engine” and did a lot of modifications:
- Make holes to fit the DC motor to reach the water pump pulley.
- Put ball bearings on every single spinning part, except the water pump since it uses the motor’s bush bearings.
- Fit a solenoid on the starter so the small gear can go in contact with the flywheel teeth when the solenoid is powered. Originally was always engaged to the flywheel.
- Put several cables for decoration and to connect all electrical components.
- The exhaust manifold originally was half-open so I fill it with epoxy putty.
- Paint and did some detailing to a few parts to look more realistic.
- Re-position the distributor to be in the correct place and to avoid interfering with the fuel lines.

There were a lot of challenges to complete these modifications. For example, some pulleys are not center correctly so they wobble and were hard to try to compensate. The major wobbling part is the fan, but is like this originally. Not much I can do about it. Also, some plastic parts are very brittle.

Part 1: https://www.youtube.com/watch?v=RvNJ1IN3Sk0

Want to build a similar model engine?
Details on my website: https://sites.google.com/site/interlinkknight/hemi
Pulleys with scale, pulleys, how pulleys work, physics

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