# Air Unit Radio Swap

{% hint style="info" %}
When operating the **DeltaQuad Evo Government Edition**, it is possible to swap the air unit for an H30 radio module. The application is plug-and-play, allowing for an easy switch between radio systems with the provided Ground Control Stations.

The same is true for the DeltaQuad Evo Stealth Edition, where the H30 radio air unit can be swapped for a Silvus air unit.
{% endhint %}

## Tools needed - Torx 10 (T10)

<figure><img src="/files/k1aSyRbgfKr29kWM9xTs" alt="" width="375"><figcaption></figcaption></figure>

## Threadlocker (medium strength)

<figure><img src="/files/CpiHmKOT2azzch0dRFjj" alt="" width="375"><figcaption></figcaption></figure>

## Preparation

1. Find a flat surface like a table big enough to fit the DeltaQuad Evo's fuselage.
2. Take the fuselage of the DeltaQuad Evo out of the flight case.
3. Put the fuselage on its landing gear on the table.
4. Remove the hatch.

## Changing the Pusher Motor Pod

1. Remove the two top screws of the avionics bay hatch.

<figure><img src="/files/c4ZzpdZ6cZ7NHr5QEoJ6" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/0WEnSnnJB2roJhMnlFjq" alt=""><figcaption></figcaption></figure>

2. Slightly lift the avionics bay and pull it forward.

<figure><img src="/files/7SpXJ5ahZZiAk0nn8ZjS" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/924F9Sdbbnb1Marac8ZX" alt=""><figcaption></figcaption></figure>

3. The air unit is installed at the back of the **Flight Management Unit (FMU)**. First, detach the two SMA antenna cables by unscrewing the SMA plugs."

<figure><img src="/files/g30HXRkTobaPu4JDdBXW" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/t5q2DaO611GfQZnj8Q4T" alt=""><figcaption></figcaption></figure>

4. Loosen the two screws attaching the air unit to the FMU.

<figure><img src="/files/2Z0q51znNnM4K3ipS0mm" alt=""><figcaption></figcaption></figure>

5. Detach the air unit from the FMU by pulling it **upwards**. At the bottom of the air unit is a connector that fits into the corresponding connector on the FMU.

<figure><img src="/files/4BiMfFFUTIrxdQDUezFS" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/he9hcDeLpt6UpTdRmcHN" alt=""><figcaption></figcaption></figure>

6. Install the new air unit by following the steps above in reverse order. Connect the new air unit to the FMU by sliding it downwards onto the FMU. Reconnect the two SMA antenna connectors.

<figure><img src="/files/Guh2JVplSQZKiqJkoS96" alt=""><figcaption></figcaption></figure>

7. Install the two screws on top of the air unit and apply **threadlocker** to the tip of each screw.

<figure><img src="/files/1krPEqHjkapYGn3W9Eb0" alt=""><figcaption></figcaption></figure>

8. To install the avionics bay hatch, catch and align its clamps with the rear edge of the avionics bay. Follow step 2 in reverse order to achieve this.

<figure><img src="/files/zR1D6Eqdl4Q9vxmK1g5X" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/9JTHIf03BXKZpdLwtrcq" alt=""><figcaption></figcaption></figure>

9. Close the avionics bay by tightening the two top screws. Please use threadlocker for these screws.

<figure><img src="/files/JNTluh3ZEmRPakiZOm38" alt=""><figcaption></figcaption></figure>

The new radio air unit is now installed. Double-check that all screws are snug but not overtightened to avoid any damage.&#x20;

If you should encounter problems during the installation process please contact **<support@deltaquad.com>** for further assistance.


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