A flying wing needs mixer setting up in your radio for Aileron and Elevator to work correctly. Using flight controller you might not need to worry about this, but without an FC you’ll have to set this up manually.
Depending on what radio you have, the setup process can be different.
For Spectrum, simply go to wing tail mix and activate ‘Elevon’.
For Flysky i6: go to Functions menu -> Elevons and activate them.
If you are using an OpenTX transmitter like the TX16S, T16 and Taranis, it’s slightly more work than other systems, as you’d have to do this manually.
Simply duplicate a quadcopter model, and apply the following Mixer settings, and that’s it.
It’s recommended to add some Expo to Aileron and Elevon for more precise control (E25% and E35% in the following image).
That’s it, if you want more detail, check out Flitetest’s video:
Let me know if you have any questions.