Specifications

motor direction if your rotor head is spinning in the wrong direction. Therefore, I recommend

avoiding sensored brushless motors unless you already know the timing is for the desired dir-

ection of rotation.

If you plan to use a sensorless brushless motor, you will need a sensorless brushless motor

controller. This motor type is not usable with a sensored brushless motor controller (such as

the older Schulze Booster-40b).

An ESC used for main motor control must have the following characteristics are required (or

must be programmable):

• No brake. If the ESC has a brake, then the motor may strip the main gear when the throttle

is reduced.

• No reverse. A helicopter rotor should never spin in reverse.

• Slow start-up. If the ESC does not have a slow startup, the heli may spin when throttle is

applied, tip over, or strip the main gear.

• No low voltage cutoff or programmable very low voltage cutoff. (As low as possible, must

be less than 0.7 volts/cell for Nicad/NiMH or less than 2.5 volts cell for LiPo.

Most airplane ESCs are not suitable for helicopters because they have low throttle resolution,

include a brake and have a fairly high low-voltage cutoff.

For the micro helis, the following are poular as main motor ESCs:

• Pixie-7P (brushed ESC, 7 amp)

• Schulze Future 11.20e (brushless, rather heavy)

• Castle Creations Phoenix 10 (brushless, very light)

• Piccoboard/Piccoboard Plus/Piccoboard Pro

• GWS ICS-100E (brushed main motor ESC, 5 amp)

• Cool Running H-12 (brushless, 12 amp)

• Cool Running H-25 (brushless, 25 amp)

For the Corona, the following work:

• Castle Creations Pegasus 35 (brushed)

• Castle Creations Phoenix 35 (brushless)

• Hacker Master 40-3P (brushless, do not use the BEC on this ESC because the ESC will

overheat on 3 servos?)

For the ECO 8/16, the following work:

• Schulze Future 12.46k

• Schulze Future 18.46k

• Hacker Master 40-3P Heli

Helicopter Parts Selection