As soon as you turn an aircraft you increase the load on it's lifting surfaces. The rotor system would read this as increased weight that it has to counteract. In level flight it is 1G so the rotor is supporting the actual weight.
A thirty degree level turn produces a loading of 1.17G. An aircraft weighing 5000lbs now weighs 5850lbs.
A sixty degree level turn produces a loading of 2G, it is now 10,000lbs.
An R44 would manage the first but unless you are flying a powerful multi-engined helicopter at about 70knots you would be pushed to achieve the second.