Having crashed my RC helis before twice due to VRS, I try to avoid coming straight down whenever possible. However, sometimes it just has to be done for one reason or the other. So I was wondering, up to what kind of speed is it generally ok to descend straight down? I try to not descend any faster than 1m/s (most of the time half that really), but it's kind of slow. Let's assume it's a Phantom 2, fully loaded with gimbal, gopro, fpv, and iosd (1300-ish grams).