Nick:
Is it possible to answer these implied questions (or give the latest position) for onshore and offshore performance?
Is there such a thing as performance gurantees?
(HeliComparator) Having (probably rightly) been given grief for battling on so long, I am not going to be the one to raise the issues of Group A performance and definitely not the one to mention the OEI OGE hover performance of the 92. However I think you will find that neither aircraft have finalised Group A/ Cat A performance supplements yet and until they do, both are a little restrictive - for example from memory I think the current S92 clear airfield takeoff distance is fixed at 3800' (1150 metres). That will I'm sure change in the fullness of time following more flight testing.
(Hugh Martin) No one has yet compared Group/Cat A performance. Do the aircraft need 800 metres of runway to take off which is more than some fixed wing aircraft need?
I hope that anyone who has ordered 225's or 92's have included a performance guarantee in their contract with the supplier.