I've been getting into building and flying electric models this summer (Summer, what summer ) but I'm finding it very difficult to understand the variety of ways that are used to describe motors. Its almost as if the manufacturers think it should be kept a closely guarded secret unless you're already in the know. I'm beginning to get my head around the '2816/12' type description although even there I have now come across a different format in the '28/10/38' style which leaves me back at square one. Then there are the '400' etc motors - what does that mean? For example today I bought a very cheap kit as a bit of fun - a small delta wing - which says it needs a 400 size motor. OK, I could presumably buy a Speed 400 or a Park 400 and not worry about it but, as these would cost £60+ including ESC I would like to look into other cheaper alternatives. But how to find out where to start? Does anyonehave an easy to understand cross reference between these different systems? Even better does anyone know of any published comparisons where you can start off knowing the Wattage you want (I guess most people know the sort of model weight they are buying for and the type of performance required which surely makes this the obvious starting point?) and work this back to motor option to achieve it? Or should I just stop trying to understand what I'm doing and ask every time? Help!