Signor (Signorita?) Emanuele,
Welcome to PPRruNe. You'll find many people here who, like you, are learning to fly helicopters. And even more people who are world-renowned experts at the R22 and any other subject imaginable, from river-rafting to crochet. Use the Search function to find information on the R22, for example. Of course, the experts here don't always agree. That's when a thread runs twelve pages and the posts become single sentence put-downs. So fire away with your questions -we are all Standing By to help you and prove how clever we are
Ciao,