I am to trial flight for SU-27 but the weather was really bad.
If you have carefully look at video .You can find out of the section leading edge slats and flaperon mix airbrake.
Of course i will to be sure to trial "COBRA".I am to discover make it so easy.
http://www.wjj.idv.tw:81/rc/RC.box/SU27%2092.11.23.mpg [27.9MB]