I am trying to make comparisons for a thesis paper. Comparing hover ceiling numbers of various helicopters does not give an easily comparable indication of vertical climb performance. I realize its a tough number to come by, but the biggest issue I have been encountering in my research is that operators who do a lot of max performance takeoffs (i.e. vertical) along with OGE hover, desire a greater power margin in the aircraft they are flying. Aside from suggesting that they lower their mission gross weight, I was looking for a way to compare that performance requirement between airframes.
I browsed the link you sent me, doesn't sound like they show much more than any other spec sheet. Just looking for a way to extract the necessary answers. Thanks.