Pegasus coaxial RC helicopter

A popular first-time electric rc helicopter is the Pegasus coaxial helicopter, shown below...

The first difference that you'll notice is that the Pegasus has two contra-rotating main rotors and no tail rotor. These two main rotors are why rc helicopters like this are called coaxial or dual rotor.

The tail rotor of a conventional helicopter is used counteract torque, which is a natural force that is generated by any spinning object eg the main rotors of a helicopter. But with the Pegasus, the two main rotors spin in opposite directions to one another and so both rotors cancel out the other one's torque, which means that there is no tendency for the fuselage to want to spin round. Hence, a tail rotor isn't needed.

This dual rotor helicopter is fully RTF (Ready To Fly) and features a realistic helicopter cockpit instead of the normal situation with most other rc helicopters, where the cockpit area is used to house the batteries or radio gear.
The motor is powered by a powerful rechargeable Li-Po battery pack which gives higher performance and longer flight times than NiMH packs.

Above, some details of the Pegasus dual rotor rc helicopter

The Pegasus is a nice choice of helicopter for anyone looking to buy an RTF rc helicopter with a semi-scale look. It's an easy helicopter to fly with very stable flight characteristics - ideal if you've never handled a radio control helicopter before!