Some five years after the start of the website finally you can now also use it to identify helicopters! Like for airplanes you can fill in checkboxes with main characteristics to narrow down your search. Go have a look here.
Additionally, I have added dedicated pages for three helicopter types, the Eurocopter EC120 and EC130, and Sikorsky S-92. More will be added in due time. If you have any suggestions for improvement please let it know!