Pprune is well up to strength on this! Irrelevences galore.
The original question is in partial panel IMC flying. You have no attitude or DI info, they are covered up. No information is available on angle of bank (or pitch). This is to simulate loss of the suction pump, which in the standard old style systems causes loss of both AI and DI.
As IO540 says, just put the TC onto rate 1 marker for the number of seconds for the required turn, at 3 deg/sec. I've always found it easy. I've never heard of a 'g' correction, but at rate 1 in a light aircraft it is negligible anyway.