I am working on a project to compare the fuel burn of CRJ200s, ERJ145s, Saab340s and ATRs (42s and 72s). Obviously the turboprops burn less fuel, but I want to understand exactly how much less. I would really appreciate any information on average hourly fuel burn on any of the noted types. Also - would love to get any other operating information. If you have flown the type - was it generally reliable or was it always in the hangar. Many thanks in advance.