dydx,
Here's a couple numbers for you to aid in conversions.

Gallon = 3.79 litres
Ounce = 29.57 cc's (liquid volume)
Ounce = 28.35 grams (Mass or weight), yes this one's confusing for us too.
Pound = 0.454 Kilograms

So the typical trainer will weigh in at around 2.5 kilograms and be powered by a 7.54 cc engine. It will carry about 236 to 295 cc of fuel for flights of approximately 10 to 15 minutes.

Here's a picture of a typical Receiver, except that it does not show the antenna, which in the U.S. is typically about 1 meter in length. Receivers, servos, transmitters, servo extensions, etc. can all be purchased individually.

Hitec Rx's can be used with Futaba Tx's (and vice versa), Airtronics and JR are compatible with each other. Servos can be used with any other brand, but some Airtronics would require swapping wires around in the connectors.

Hope this helps. [sm=spinnyeyes.gif]
Dennis-