# X55 Setup Guide

X55 Setup

* With the X55 in the travel case, insert the landing gear into the landing gear mount and close the latches. Make sure the landing gear spring pin snaps into the hole in the Landing Gear Mount.

![](https://2204187310-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FEEy9Jtkhq7S6GY1u4d4N%2Fuploads%2FyiZBhCOykV4nCpNnAjUb%2F0.png?alt=media)

* Check and verify that there is no damage to the landing gear tube structure.
* Lift the arm holder knobs to release the arms. Unfold the arms and remove the prop protectors.

![](https://2204187310-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FEEy9Jtkhq7S6GY1u4d4N%2Fuploads%2Fy0RIjhzVVK86EDJmZxS6%2Funnamed%20\(1\).png?alt=media\&token=6d91be90-e0ba-4d42-8609-5d2bc3e32f65)

* Secure the arms by tightening the knobs and securing the latches once fully tightened. The latch is a redundant safety mechanism to prevent the knob from coming loose during flight.&#x20;
* Unfold the propellers and make sure they are straight.



![](https://2204187310-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FEEy9Jtkhq7S6GY1u4d4N%2Fuploads%2FFRBN33g3D9PYFdxVAiEz%2F3.png?alt=media) ![](https://2204187310-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FEEy9Jtkhq7S6GY1u4d4N%2Fuploads%2FiZGYWnPLOPZGyuWSD5gw%2F4.png?alt=media)

* With the arm in the locked position, check to make sure there’s no excess movement/play by trying to rotate the arm in both directions, using the propellers as leverage. (applying wiggling force on the propeller)

![](https://2204187310-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FEEy9Jtkhq7S6GY1u4d4N%2Fuploads%2FiAxcmhh7UfO2qShbiPfU%2F5.png?alt=media)

* Check the propeller blades for damage, nicks, scrapes, or looseness/play. If a propeller blade has been nicked, it should be replaced. Check blade bolts and make sure they are tight.
* Check the Motors, make sure they spin freely, and that there is no scraping sound or grinding feeling.
* Secure both antennas to the landing gear using the provided hook and loop strap.
* Place the Power Module on top of the X55 and close all four latches.

![](https://2204187310-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FEEy9Jtkhq7S6GY1u4d4N%2Fuploads%2FFIuaUAoSlc9T4VDoQohL%2F6.png?alt=media)

![](https://2204187310-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FEEy9Jtkhq7S6GY1u4d4N%2Fuploads%2FOnZV3N10MsnM2IZMOfiO%2F7.png?alt=media)

* Secure the payload to the payload rails of the X55.
* Check the Center of gravity (CG) and try to make adjustments (front/back) to move the CG to the center of the X55.&#x20;
* Secure the payload to the payload rails once the CG is centered.

![](https://2204187310-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FEEy9Jtkhq7S6GY1u4d4N%2Fuploads%2F6JVcK6nb68SFTUdCrP2e%2F8.png?alt=media)

{% hint style="warning" %}
Bringing the CG as close to the center of the X55 as possible will improve the controls of the X55 and minimize unequal motor output.
{% endhint %}

* Check that all antennas, GPS modules, payload mounts, and electrical connectors are secure.
* Always turn on the remote radio controller before powering on the X55.
* Plug the Main Power Cable into the “Power In” on the X55 and the “Power Out” on the Power Module. While the X55 initializes, keep the X55 as still as possible.&#x20;

<figure><img src="https://2204187310-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FEEy9Jtkhq7S6GY1u4d4N%2Fuploads%2FT1hvQSCqeRma7kraT11h%2F10.png?alt=media" alt="" width="563"><figcaption></figcaption></figure>

{% hint style="warning" %}
If the X55 moves during initialization, the gyro sensor may not calibrate properly and will fail to start or give gyro-related warnings.
{% endhint %}

## **Before Takeoff**

* Check the radio controller and secondary GCS battery level (only if applicable - e.g. using a laptop for telemetry and control), and make sure they are sufficient for the duration of the operation.
* Check the battery/fuel level of the Power Module to make sure there is sufficient capacity for your intended flight operation.
* Check failsafe settings to ensure they match your expectations.
* Check that the button and switches on the radio controller are set correctly based on the desired flight mode.
* Verify that there are no flight warnings in the GCS (QGC, Mission Planner, etc.) and that there is a good GPS fix (generally more than 12 satellites).

{% hint style="warning" %}
We recommend at least 12 satellite connections to ensure a good GPS signal
{% endhint %}

* Press and hold the arm switch for a few seconds to pre-arm the X55. The LEDs on the GPS will turn blinking green, indicating that the X55 is ready for arming.

![](https://2204187310-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FEEy9Jtkhq7S6GY1u4d4N%2Fuploads%2FmioxXWExNVBCt4kxs244%2F13.png?alt=media)

* Make sure none of the motors are emitting a beeping sound.
* Check and make sure the propellers are clear to spin.

{% hint style="danger" %}
The X55’s props spin at a high rpm and can cause severe injury and damage. Always make sure the propellers are clear to spin and stay at least 5m away from the X55 during takeoff.
{% endhint %}

* Select Altitude Hold mode or Loiter Mode.
* To start the motor, hold the left stick at full low throttle and full right yaw to the arm. Ensure the motors are spinning.

<figure><img src="https://2204187310-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FEEy9Jtkhq7S6GY1u4d4N%2Fuploads%2FDPbm3u7g62Azsqzpa3S5%2Fcontroller.JPG?alt=media&#x26;token=d14a5394-5b02-46b7-8e24-ac76073883cd" alt=""><figcaption></figcaption></figure>

{% hint style="danger" %}
The X55’s props will start to spin at idle speed even if the throttle is all the way down.
{% endhint %}

* Apply power to lift off and ascend quickly off the ground (1-2 meters). Confirm the X55 is stable and responds correctly to the stick inputs.
* Check that battery voltage has not dropped significantly under load and that all the values are as expected on the ground control software.
* Proceed to the mission/desired flight mode with caution.

## **During Flight**

* Check the voltage reading at regular intervals.
* Be aware of meteorological changes during flight.
* Be aware of any manned/unmanned flights around the operation area.

{% hint style="danger" %}
The recommended land voltage is 44V. We recommend that the pilot brings the aircraft back to the intended landing location before or around this voltage, and does not rely on the failsafe actions to handle low battery procedures.
{% endhint %}

{% hint style="danger" %}
It is the pilot's responsibility to always maintain a visual line of sight with the X55, and to avoid flying over people, or near any aircraft. Use visual observers if necessary.
{% endhint %}

## **Descent, Landing, and Power Down**

* Make sure the landing area is clear.
* Descend with a steady angled flight path towards the landing area, and avoid descending vertically into the downdraft.
* Slowly descend the X55 to touch down with minimal horizontal movement to avoid rollover.
* Upon landing, disarm the motors by holding the throttle all the way down and moving the stick to full left yaw.

<figure><img src="https://2204187310-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FEEy9Jtkhq7S6GY1u4d4N%2Fuploads%2Fo5mhtRCxI2iXAdITrsjN%2Fcontroller2.JPG?alt=media&#x26;token=b54aea06-b161-4ce1-bdfe-1978dfd85dd8" alt=""><figcaption></figcaption></figure>

* Ensure that all motors are stopped and disarmed before approaching the X55.
* Press the arm switch to further disarm the X55 before removing the payload/ disconnecting the Main Power Plug.

![](https://2204187310-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FEEy9Jtkhq7S6GY1u4d4N%2Fuploads%2FUwPE3cp9DigJist2OfH8%2F18.png?alt=media)

## **After Each Flight**

* Inspect all motors for any signs of damage, grinding, or debris.
* Inspect all propellers for any signs of damage or play.
* Inspect all booms for any signs of damage/play.
* Inspect landing gear for any damage or cracks.

## **After the Last Flight**

* Remove the Power Module from the X55.
* Release the knob latch and unthread the knob.
* Fold the propeller blades and install the propeller protectors to secure the propellers and prevent them from moving around.
* Fold the booms inwards and lift up the spring plunger mechanism and insert the arm retaining part into the holder.

![](https://2204187310-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FEEy9Jtkhq7S6GY1u4d4N%2Fuploads%2FVndJENQJSoCX4ebFC31g%2Funnamed%20\(2\).png?alt=media\&token=9b59a851-05ee-43a1-9b47-9ac56b6e03a8)

* Remove the antenna hook and loop straps, and fold the antennas up for storage.
* Place the X55 into the case carefully, and pay special attention to the GPS when putting the X55 into the travel case.
* Remove the landing gear

![](https://2204187310-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FEEy9Jtkhq7S6GY1u4d4N%2Fuploads%2FPnoMpeVs7FZxUBxEUfeo%2F20.png?alt=media)
