> For the complete documentation index, see [llms.txt](https://hrftank.gitbook.io/hrftank/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hrftank.gitbook.io/hrftank/i-getting-started/readme.md).

# Overview & Features

Heavy RC FPV Tank

{% embed url="<https://www.youtube.com/watch?v=woVqPZ1tKaw>" %}

Hey! I’d like to introduce you to the **HRF Tank** - a tracked RC FPV vehicle designed around 3D printing and readily available RC and workshop components.

The project started several years ago, and I’ve been working on it on and off ever since, gradually improving, rebuilding and expanding it. I’ve finally decided to make it public and invite other DIY, 3D-printing and electronics enthusiasts to build their own versions and develop the platform together.

I hope the project’s complexity won’t scare you off. The HRF Tank is designed to be modular, and many of its systems can be simplified or replaced with your own solutions.

**PS:** I’m not an engineer - this is an amateur hobby project. So if you spot any mistakes, questionable design choices or unnecessarily complicated solutions, don’t be surprised. Feel free to let me know in the comments on Printables or on Discord (*coming soon*). :smile:

<div data-with-frame="true"><figure><img src="https://673609632-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FhmKl11OGPwbKiNEUvA5L%2Fuploads%2Fiqpld8IVEU0ePhxTO3Qw%2F20260919_125419%2016%20na%209.jpg?alt=media&amp;token=ba12dd0d-ce40-45a4-b079-7b6d6928e4a0" alt=""><figcaption></figcaption></figure></div>

<div align="center"><figure><img src="https://673609632-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FhmKl11OGPwbKiNEUvA5L%2Fuploads%2FhHlIgVlQUvw4w1ZgxjXG%2F20260919_125445%2016%20na%209.jpg?alt=media&amp;token=9c3cabc5-39b6-44cb-a024-a32ec0997c73" alt="" width="563"><figcaption></figcaption></figure> <figure><img src="https://673609632-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FhmKl11OGPwbKiNEUvA5L%2Fuploads%2FdQ6t01flwXYocNl4ARRP%2F20260919_125435%2016%20na%209.jpg?alt=media&amp;token=bfdba38b-2189-4da9-9d67-51871c809bbc" alt="" width="563"><figcaption></figcaption></figure> <figure><img src="https://673609632-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FhmKl11OGPwbKiNEUvA5L%2Fuploads%2FgAaATqqcYKQXjkSmd6os%2F0d892515-38e1-41e3-944b-05be622b7c78.PNG?alt=media&amp;token=e893788f-f4dd-465c-82ab-b9cb98d4dbf0" alt="" width="563"><figcaption></figcaption></figure> <figure><img src="https://673609632-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FhmKl11OGPwbKiNEUvA5L%2Fuploads%2FCeKzLGAiaj7FBxXd7dKy%2F25beb4fe-7bbe-4c82-a431-0b4010674410.PNG?alt=media&amp;token=6e2f11b9-7967-4291-a3f0-238a60fa8cb3" alt="" width="563"><figcaption></figcaption></figure></div>

## Specifications & features:

* **Dimensions (L × W × H):** 66 × 39 × 25 cm (26 × 15.4 × 9.8 in)
* **Mass:** 12-14 kg (26-31 lb), depending on configuration
* **Modular design:** optimized for 3D printing, modification and repair
* **Internal layout:** three separate compartments for the motors, electronics and battery
* **Suspension:** Christie-type suspension with 30 mm of travel and 70 mm of ground clearance
* **Gearboxes:** 1:15.5 reduction ratio for increased torque
* **Road wheels:** 10 wheels for better load distribution and improved performance on rough terrain
* **Dynamic track tensioner:** maintains track tension during suspension movement
* **Tracks:** 70 mm double-pin tracks with optional rubber-like TPU pads
* **FPV cameras:** front and rear cameras for improved situational awareness
* **Drive system:** two 3660 brushless motors with reversible ESCs
* **Cooling:** optional liquid cooling for the motors and ESCs, with five onboard temperature sensors
* **Custom controller PCB and PDB:** lighting, cooling and temperature control, wireless telemetry, and a separate 12 V power system supporting both 3S and 4S Li-Po batteries
* **Headlights:** two 3 W LEDs with lenses and heat sinks
* **Tail lights:** dynamic rear lighting that reacts to throttle position
* **Coming soon:** a 360° rotating turret with an additional camera and/or gel ball blaster

<div><figure><img src="https://673609632-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FhmKl11OGPwbKiNEUvA5L%2Fuploads%2F6GNq1UFiXsgZdOSP6Zmy%2F20260919_125530.jpg?alt=media&amp;token=7633f200-76fd-4680-8333-be5b806f7f65" alt=""><figcaption></figcaption></figure> <figure><img src="https://673609632-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FhmKl11OGPwbKiNEUvA5L%2Fuploads%2F75kbgEEsLlFDVDfxHmRF%2F20260919_125539.jpg?alt=media&amp;token=4798480c-fbeb-48e8-aeb1-57d517c26748" alt=""><figcaption></figcaption></figure> <figure><img src="https://673609632-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FhmKl11OGPwbKiNEUvA5L%2Fuploads%2FZXVturBYs7jB3G4WCKFr%2F20260919_125558.jpg?alt=media&amp;token=aec1737a-c9c2-46d3-a52d-b7c0d47e0cd1" alt=""><figcaption></figcaption></figure></div>

<div><figure><img src="https://673609632-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FhmKl11OGPwbKiNEUvA5L%2Fuploads%2Fbj2T25pAupWleju8HtQO%2F20260919_125635.jpg?alt=media&amp;token=09884878-390d-4c54-8f35-0436e0232b83" alt=""><figcaption></figcaption></figure> <figure><img src="https://673609632-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FhmKl11OGPwbKiNEUvA5L%2Fuploads%2FXid6RFexv5tLqv33dD04%2F20260919_130515(1).jpg?alt=media&amp;token=fb717ca4-25a8-4bde-ace2-9f89f1d7c560" alt=""><figcaption></figcaption></figure> <figure><img src="https://673609632-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FhmKl11OGPwbKiNEUvA5L%2Fuploads%2FtfngYiojvxMu2Ut80I4a%2F20260919_130730.jpg?alt=media&amp;token=5314f234-4a84-4385-9e1a-b39982e1f381" alt=""><figcaption></figcaption></figure></div>

<div><figure><img src="https://673609632-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FhmKl11OGPwbKiNEUvA5L%2Fuploads%2FXg9pWzWpkSdNvwMsw0Z6%2Fprzek%20przek.jpg?alt=media&amp;token=e5f56b8f-c22f-4384-8bda-f5be9576513c" alt=""><figcaption></figcaption></figure> <figure><img src="https://673609632-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FhmKl11OGPwbKiNEUvA5L%2Fuploads%2FaD3yKGvQofdhxV2gKXNj%2Fchlodnica.jpg?alt=media&amp;token=20335356-befa-4ed8-a78d-f2cebb25c835" alt=""><figcaption></figcaption></figure> <figure><img src="https://673609632-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FhmKl11OGPwbKiNEUvA5L%2Fuploads%2FYRE4drKYILpwQSpirMnX%2Fpcb%20pdb.jpg?alt=media&amp;token=eea87dc6-81f7-4add-8319-63172fa32679" alt=""><figcaption></figcaption></figure></div>

{% hint style="info" %}
The whole design is intended to be easy to customize. You can build a relatively simple version using standard RC electronics, or gradually add more advanced features as your project develops.

For example, liquid cooling is completely optional. It is useful for demanding setups, but it also adds cost, complexity and additional components. Feel free to build the “vanilla” version of the platform first and add more advanced systems later.
{% endhint %}