> For the complete documentation index, see [llms.txt](https://docs.freeflysystems.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.freeflysystems.com/products/products/alta-x/untitled-5/12mm-rails-kit.md).
# 12mm Rails Kit
Installation Instructions
1. Flip your aircraft to access the underside of the chassis
2. Set it on a clean, flat horizontal surface to avoid damaging props if they are installed
3. Using the 4x included M3x10 'Combohead' screws and hex ball driver, loosely fasten each of the two rail adapters to the lower chassis, taking note of the position of the GPS unit to determine forward flight direction.
1. Refer to the [lower chassis mounting pattern guide](/products/products/alta-x/untitled-3/technical-drawings-and-cad.md#mounting-interfaces-chassis-underside). This accessory mounts to the 'green' 160mm square pattern.
2. The adapters can be mounted either parallel or perpendicular to the direction of flight, depending on your application. Most applications align with forward flight direction.
3. The adapters can also be mounted angled inwards or outwards, depending on which suits your specific application best
4. Open the red locking levers and innsert the two 12mm x 500mm rails to the desired position within the clamps.
1. Note that while the adapters are not tightened down, the tubes will be able to bring the adapter bores into alignment.
5. Proceed to tighten the red locking levers and then tighten the 4x chassis fasteners fully.
6. Flip aircraft right-side-up and proceed to attach your payload and landing gear solution.
---
# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.
## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation by asking a question.
Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters:
```
GET https://docs.freeflysystems.com/products/products/alta-x/untitled-5/12mm-rails-kit.md?ask=&goal=
```
`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.
Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.
