most look like a small jet engine
No, helicopters do not look like trees.
They are either powered by a turbine engine like a jet engine or a piston engine.
The rotor is like the engine to the propeller. A propeller is the fan like blades on the top that spin to make the helicopter fly.
just like an airplane
name of the animal which look a helicopter
very much like any aircraft.
There is a few places that you could look for rc helicopter parts online, you can look on sites like amazon. but you could also look on sites like future shop or radio shack, that sell things like that
A helicopter with a jet engine. The engine is adapted to give power to a transmission, rather than thrust.
Google " Sikorsky VS300 " and you will find a pic of it
Blackout is designed after the AH-64 Apache Helicopter.
the engine