While it's true that nitro planes are faster, They don't perceive to be. Allow me to explain...

We humans perceive speed by how long it takes a moving object to pass its own length. In other words, if you have a 5 foot long object, and a 1 foot long object traveling at 1 foot per second, it will take 5 seconds for the 5 foot object to completely leave its original space, whereas that 1 foot object will have left ITS original space 5 times. So even though they are traveling at the same speed, the 1 foot object will appear to be traveling 5 times faster.

And, because the plane is larger and faster, that explaines why you need a larger area to fly in!

So find your local club, and get help! You'll be glad you did!