Ronnie,
Try to get your hands on a copy of the book 'Helicopter Test & Evaluation' (Cooke & Fitzpatrick ISBN 0-632-05247-3). Expensive to buy but free from the library.
Pg 247- 257 gives a good explanation of governor operation and it's relationship to static and transient droop. The explanations are also closely modelled on the Lynx/ Gem.....as is alot of other stuff in the book.