Energy in the flywheel question

an engine rotating at 2000rpm has a flywheel of 15kg and a radius of gyration of 300mm attached to a smooth out engine cycle.

what energy is available from the flywheel at this speed in joules?

thanks.

E = ½I*w²

I = m*R² = 15*.3² = 1.35 kg∙m²
w = 2000*2π/60 = 209.44 rad/sec

E = ½*1.35*209.44² = 29609 J