Actually, this plane does have throttle.

Glow-engine powered planes of this kind need a 4th servo to control the throttle. Since this plane is electric, it uses an ESC (Electronic Speed Control) which plugs into the battery, reciever, and motor and acts as a throttle for the electric motor, controlling the amount of current to the motor, therefore changing the power output, which in effect is a throttle. [8D]

You'd need more than servos to get this one flying: You'd need 3 servos, a reciever, ESC, and transmitter if you dont already have one. The RTF version has all of this put together in the bundle, so you dont have to hunting to buy the individual components, and it will be cheaper than buying everything seperately. Also, is has the required parts, so you wont have to worry about buying the right or wrong thing: what comes in the RTF pack is right for the plane.

If you DO already have a transmitter, it MIGHT be cheaper to go the individual-buying-of-pieces route, but if you dont, nothing really can beat the RTF.