RadioLink's 3-axis multi-function flight controller has the ability to both assist in training and add desirable levels of stability to any elevon or taileron-controlled (delta wing configured) model. In Stability Mode, which is ideal for training, the model's bank and pitch angles are limited to 70 degrees in roll and 45 degrees in pitch. This provides a perfect aid to the training process, preventing raw beginners from over-controlling and getting into serious trouble. Gyro Mode, meanwhile, offers exceptional stabilisation to help counter the effects of wind and facilitate a much smoother flight; a wonderful feature for foamies and lightly-loaded models that suffer when it's gusty, particularly on landing. With the ability to switch remotely between functions and, better still, turn them off, this is a controller that can comfortably be used for training to BMFA A-Certificate standard and disabled during the test. Compact and light its a device you'll find useful in a variety of models for both indoor and outdoor flight. Trust us, you won't realise you need one till you've got it.