I may as well ask this question as I often hear these terms bandied about concerning types of planes and their uses
what is the difference between ... : a fun fly, sports model, scale model, racing model, stunt model , '3d' plane , a pylon racer etc

and why do you see some of these planes having tiny props and others having long, pitched ones

help me know what you guys are going on about in these forums

regards

Tom.