An RC flight simulator is a computer program that allows pilots of
radio-controlled aircraft to practice on a computer, without the risk and
expense of a damaging a real model. Besides the obvious use of training
beginners, they are also used for practicing new aerobatics and evaluating a
model before buying it, and of course for flying when it's dark and raining!
There are a number of commercial packages available, such as Hangar 9's FS One,
SVK Systems ClearView, Great Planes RealFlight G3 and IPACS AeroFly for well
over $300. There are also some freeware packages, the most popular being Flying
Model Simulator (FMS) and believe us, the freeware works just as well as the
$300 copy! The Esky Flight Simulator is by far the BEST selling flight simulator
program in the world now!
BONUS! Most simulators allow the importing of add-ons such as new models
and landscapes. There are many web sites dedicated to offering free content like
this. Try to Google them : )