Does anyone know where I can find reliable hourly operating cost information for certain aircraft? I've done some Googling but haven't found a lot of concise data. All manufacturers seem to to have their own data claiming their aircraft is the cheapest to operate.
I'm looking especially for the ERJ-145, E-170/175, Q400, and ATR-72. I know that the ATR is the cheapest/hour but I'd like to know the magnitude of the difference between it and the Dash/jets since it is also the slowest.