Great Planes C-55 Brushed ESC - GPMM2055 User Manual

Great Planes Hardware

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C-25, C-35 and C-55 High-Power High-Frequency

Electronic Speed Controls w/BEC

INTRODUCING THE ELECTRIFLY LINE OF

HIGH-POWER BRUSHED ESC’s

The ElectriFly

line of High-Power ESC’s feature the

“Safe Start” system to prevent accidental motor starts by
disabling the motor circuitry until the throttle stick is
moved to full throttle, then to the “off” position.

Other features include BEC (Battery Elimination Circuitry)
which allows the motor battery to power the receiver and
servos. When the motor battery voltage is reduced to a
set voltage per cell, the low-voltage cut-off circuitry stops
the motor while continuing to supply power to the
receiver and servos. This eliminates the need for and
weight of a separate receiver battery. The ElectriFly line
of ESC’s comes with thermal protection that reduces the
throttle to 70% when the maximum temperature is
reached. These ESC’s can easily be adjusted for use
with NiCd/NiMH or Li-Po batteries. These ESC’s function
with brushed motors only!

SPECIFICATIONS

C-25

Dimensions:

0.98" x 0.43" x 0.71"

[25 x 11 x 18mm]

Weight: 0.85oz.

[24g]

Input Voltage:

6-10 cells NiCd/NiMH

2-3 cells Li-Po

Continuous Current:

25 amps

Max Rated Current:

35 amps

BEC Voltage:

5V / 1.5A

Low-Voltage Cutoff: 0.8 volts per cell NiCd/NiMH

2.75 volts per cell Li-Po

Battery Plug:

Star

®

Plug

Switching Frequency:

1.3 kHz

C-35
Dimensions
:

1.30" x 0.43" x 0.71"

[33 x 11 x 18mm]

Weight: 1.08oz.

[31g]

Input Voltage:

6-12 cells NiCd/NiMH

2-4 cells Li-Po

Continuous Current:

35 amps

Max Rated Current:

45 amps

BEC Voltage:

5V / 1.5A

Low-Voltage Cutoff: 0.8 volts per cell NiCd/NiMH

2.75 volts per cell Li-Po

Battery Plug:

Star

®

Plug

Switching Frequency:

1.3 kHz

C-55
Dimensions
:

1.42" x 0.43" x 0.71"

[33 x 11 x 18mm]

Weight: 1.22oz.

[35g]

Input Voltage:

6-12 cells NiCd/NiMH

2-4 cells Li-Po

Continuous Current:

50 amps

Max Rated Current:

65 amps

BEC Voltage:

5V / 1.5A

Low-Voltage Cutoff: 0.8 volts per cell NiCd/NiMH

2.75 volts per cell Li-Po

Battery Plug:

Star

®

Plug

Switching Frequency:

1.3 kHz

IMPORTANT PRECAUTIONS

Read and follow these instructions carefully before
using.

• Do not operate the airplane on or near water. Never

allow water, moisture or any foreign material onto the
ESC’s PC board.

• Never use more cells then specified for the main

battery pack.

• The ceramic capacitors must be properly installed on

the motor to prevent radio interference.

• Always disconnect the motor battery from the ESC

when not in use.

• Always switch on the transmitter before switching on

the ESC.

• Use heat-shrink tubing to insulate any bare wires from

the motor battery to the ESC and from the ESC to the
motor to prevent a short circuit.

• Allow the ESC to cool before touching.

STEP 1 THE RECEIVER PLUG

The receiver plug attached to the
speed control plugs directly into a
Futaba

®

“J” receiver. However, if you

are using an Airtronics “Z,” Hitec “S” or
JR receiver, you will need to slightly
modify the receiver plug on the ESC. To modify the plug,
use a hobby knife or wire cutter to carefully cut off the
alignment tab on the side of the receiver plug as shown.

TRIM OFF

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