Protech ZOOM 425 ccpm Specifications download pdf (Page 41)

heading hold gyro. It is not really recommended for microhelis because it is very prone to over-

heating and will shut down abruptly when it overheats. It will also not re-arm until it cools down

which can take 10-15 minutes. If you must use one, be sure to mount it where it will get airflow

(NOT inside the cabinet on the side of the heli).

The Century CN2000-4 gyro+mixer board is also similar to the Piccoboard and is also not up-

gradable to a heading hold gyro.

The Century CNE052 mixer board is similar to a Piccoboard without a gyro (i.e. mixer + dual

ESC). You must use a separate gyro with this board.

All of these combo units (Piccoboards, PHA-01, CN2000-4, CNE052) are only usable on sub-

micro and microhelis. They will not work on larger helis such as the Corona, ECO 8, Logo 10,

etc.

6.1.4. FMA Copilot

Some people have used the FMA copilot on their Corona heli. This is a device which will

"level" the helicopter for you if you release (center) the cyclic control. It will not work indoors

because it needs to see the horizon to work properly. It does not replace a gyro, so you will still

need a gyro.

The FMA copilot is nice, but really isn't really necessary unless you are having problems learn-

ing hovering. If you have a limited budget, then it is more important to buy a good heading hold

gyro than the FMA copilot.

Also, you will likely outgrow the FMA copilot after a few months and remove it whereas you will

not outgrow a good heading hold gyro. Therefore I recommend buying a good heading hold

gyro first, and purchasing an FMA copilot later if you become frustrated with learning hovering.

6.1.5. Revo mixing

If a transmitter without revo mixing capability is used with a yaw rate gyro, then some sort of

revo mixing capability is required on the heli. Some heli motor controllers such as the Picco-

board, TREC, and 3-in-1 boards include revo mixing capability.

Dionysus Designs also manufactures a separate revo mixing board which allows the use of

both brushed and brushless main and tail motor ESCs.

6.2. Servos

6.2.1. Swashplate (cyclic) servos

Torque, speed, and precision should be considered for swashplate servos.

Note

All servos controlling the swashplate MUST be the same type. Do not mix servo

types otherwise cyclic control will be erratic.

6.2.1.1. Corona/ECO 8/16 choices

The servo generally recommended for the Corona is the HS-85MG because these last longer

then the HS-81MG when abused by beginners.

Helicopter Parts Selection

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Protech ZOOM 425 ccpm Specifications Page 41