| Coaxial radio controlled model helicopters are an ideal | | | | - cheaper since less electronics are required. |
| introduction to rc helicopter flying gue to their stability | | | | - very stable in the hover making them ideal for |
| and slow responsiveness. This makes them far easier | | | | orientation practice. |
| to master than the traditional single rotor / tail rotor | | | | - most are available ready to fly requiring no building or |
| counterparts. With a bit of practice they are stable | | | | setup. |
| enough to be flow indoors in a confined space so your | | | | - generally they are very tough and can survive |
| canpractice anywhere. | | | | crashes well. |
| A conventional rc helicopter has a single rotor and a | | | | Disadvantages |
| tail rotor to control yaw ie the direction in which the | | | | - the motors need to be evenly matched so the |
| helicopter is pointing. A coaxial helicopter however | | | | torque generated by each rotor is similar. |
| has two rotors on top of the helicopter and no tail | | | | - very slow and unresponsive. Getting them to move |
| rotor. These rotor rotate in opposite directions and the | | | | from the hover can require quite violent stick |
| torque generated by each rotor cancels the other one. | | | | movements ! |
| This results in extremely stable hovering. Yaw is | | | | - at extreme cyclic throws the rotors can clash |
| controlled by adjusting the speed of one of the two | | | | causing a crash |
| rotors. Coaxial helicopters are available in 2, 3 and 4 | | | | Generally coaxial radio controlled helicopters are small |
| channel versions. We would recommend a 4 channel | | | | in size ranging from 3 inch rotor spans up to about 15 |
| coaxial helicopter as this provides for controls pitch, | | | | inch. Whilst some coaxial helicopters can be |
| bank, throttle, and yaw. | | | | considered nothing more than toys some of the better |
| Coaxial helicopters have a number of advantges and | | | | 4 channel models from companies such as ESky and |
| disadvantages. | | | | E-Flite are an excellent introduction to the world of |
| Advantages include | | | | radio controlled model helicopter flying. |
| - easier setup due to them requiring no gyro. | | | | |