hi, ch8 3 way switch, all the way toward you well open the hatch, in the middle well close it, all the way down smoke this is nice to write in the sky and looks sweet in high altitudes you might want to use your binoculars tell you get use to it, speed around 370MPH and it handles way nice put a lot of time in this f-15. ch5 is air brakes as soon as you touch down flip the switch towards you to engage break. ch7 is retracts. ch6 is flaps i don't you them. this is a blast to fly. it is way fun to land, just give it some distance from the airport it does Clyde in nicely using very little throttle. hope you like it.{ live it up}