My question for this situation - why are we continuing to put up with the dreadful level of information provided to us?
Turbine engines that are above spec lead us to not trust the charts, because the performance is better than expected. Turbine engines that are below spec get us into trouble. But at least with a turbine engine there is a way to know whether the engine is above or below spec.
Piston engines have no such check, but surely someone could develop one - Just to name one problem, piston engines can have poor compression, and the pilot wouldn't be aware of it till it's too late.
And none of the charts take into account wind.
Civil charts only publish one hover height for in-ground effect hover, and many out of ground effect charts are based on flying in to the hover, as opposed to climbing up to it.
So why are we putting our lives on the line for such poor information, when the technology surely exists to give us better, more clear and easily understood data???
Answers on a postcard please!