John L said:So essentially, if you don't have all green flashes at take-off.. it may be considered a more risky flight? I live out in the country, southern PA. I've never had any fly away or control issues but even out in the open here I can never seem to get all green flashes before launch. Some car GPS's don't work very well here either sometimes. If I take the phantom up in the sky for a bit and then land it, it will come back with all green lots of times.