Electron Electric Geardoor, Airbreak or Canopy actuator.
To open and close your gear door, airbrakes, canopy...etc.
The linear actuator can be controlled directly from your receiver.
Stroke is 25mm
Link to the User manual: User manual of the Electron Linear Actuator
The electron linear actuators are designed for rc models and they are able to open e.g. gear doors and airbrakes on your model.