The nose down pitching moment caused by a forward centre of mass must be opposed by rearward control column movement generating tailplane downforce and an increased wing angle of attack. Hence at the same IAS, an aeroplane with a forward centre of mass will be operating at a higher angle of attack than one with a rearward centre of mass; it will, as a consequence, reach crtical angle of attack at a higher IAS than the aeroplane with the rearward centre of mass.