The starting current in the main and auxiliary winding of a single-phase induction motor is I_M = 5∠-80° A and I_A = 2∠-50° A. The rotor resistance referred to primary is \(R_2^{'} = 1\;{\rm{\Omega }}\). The rotor of number of turns of the auxiliary and the main winding \(a = \frac{{{N_A}}}{{{N_M}}} = 0.2\). The starting torque in synchronous watts is _________