From what Google told me and the help from you guys here I *think* i understand what i need to make a electric engine work from a RC.

I think the basic setup is:

- a receiver connected to a battery.

The remote transmitter sends signal to the receiver. The receiver gives power to the ESC and the ESC makes the engine work,

So my buy list is:
1 remote
1 receiver
1 ESC
1 battery and i´m good to go.

Did I miss something?

Can i press the confirm buy button?

Don't forget the steering servo which will hook into your receiver. Most of the time, if you purchase new, you will get a transmitter (radio) that includes a servo (not the best) and a receiver. Throw in your motor and off you go. For the battery do you best to afford a Lipo set up for the best overall run times, power and usability.

Hope this helps a bit. You seem to be doing alright so far!

You don't need a receiver battery - in an electric, the receiver is powered from the main battery. As long as the battery you listed is big enough to run the motor, it will power the onboard electronics (receiver and servos).

Receiver batteries are only required for nitro RCs.

Or in electrics where the voltage is too low or too high to properly power the receiver and servo. Such as in many 1 cell lipo or 4 cell Nixx setups, depending on the ESC, or in extreme high voltage setups. This is probably irrelevant information to the OP, and Im sure thats why you left it out, but just to be clear!

He was talking about building a hovercraft using an EDF arrangement....