I was talking to my Physics teacher about this at lunch. If I was to have an rc Helicopter which i had hovering perfecting (if only i had the skill) on a train at rest. What would happen in terms of the position of the helicopter as the train accelerated? Would is stay at the same point in reference to the train (e.g above my table) or would it stay is the same point in the air and the train would move without it? My teacher and i thought that at first the helicopter would go backwards but then just stay hovering slightly behind where it was when at rest. Any insights or thoughts plz.