Found another function of crow on these thread. Not sure if this can be called crow because of the very small amount of deflection but if it is, crow can be also used to increase cruising speed. I'm not recommending this but it can be also use for higher speed applications other than landing. Above cruising speed of our jets at zero deg angle, the altitude can increase rapidly as airspeed goes higher even though without any elevator input or changes in AoA, that is because of the natural camber of the wings. To minimize this effect other than using elevator or trim (when stab is almost 0-deg) is to deploy a very small crow that is close to eliminate the natural camber of the wings as airspeed progress then reduce trim and throw of elevator if required. In this way the aircraft has higher cruising speed without increasing too much load and drag to the entire wings including stabilizer. The disadvantage is higher stall speed however flaps can be used in small increment for lower speed.