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GPMM2070 BL-8 Brushless ESC 8 Amp
TECH NOTES
This is the Great Planes Electrifly 8 Amp Electronic Speed Control
for Brushless Motors.
Great for small, lightweight, high-performance airplanes
from flat-foams to built-up 3Ds with brushless motors.
**Additional Technical Info Will Be Added When It Becomes Available**
FEATURES: Works with all types of brushless motors including "out runner" styles
which are capable of handling 8A continuous current
Custom BEC (Battery Eliminator Circuit) handles up to 1.5A; great for
models requiring three high-powered servos
Fully proportional with brake and reverse
Compatible with Li-Po, NiCd, and NiMH type batteries
Programmable features include:
Brake Control: ON/OFF
Safe Start: ON/OFF, prevents accidental motor spin at start-up
Switching Frequency: 8kHz or 16kHz for long run times and cool
operation
Low Voltage Control: reduces or cuts motor control but maintains
radio control
Timing: soft (7°), hard (30° for out runners), or automatic
Reverse Rotation
180 day limited warranty
INCLUDES: One Great Planes 8A Speed Control with pre-installed universal
radio connector, micro battery connector and 2mm gold plated female
bullet motor connectors
REQUIRES: Installing in airplane and connecting motor and battery wires
SPECS: Input Voltage: 5-10 NiCd/MH cells, 2-3 Li-Po cells
(20V input w/o BEC)
Output Current: 8A continuous max., 9A surge max.
BEC: 5V / 1.5A
Operating Frequency: 8 or 16kHz programmable
ON Resistance: 0.013 ohms
Brake: ON/OFF
Acceleration: Soft, hard, or automatic
Low Voltage Cutoff: Programmable
Max. Temp. Cutoff: 230oF (110oC)
Dimensions: 0.87 x 0.16 x 0.83" (22 x 4 x 21mm)
Weight: 0.42oz. with wires (12g)
COMMENTS: The instruction sheet for the initial shipments of the Electrifly
BL-8 Brushless ESC failed to explain how to change the setting of
the brake function in the programming. The following step should be
performed after Step 7.C. in the instruction sheet:
D. BRAKE: To change the brake setting, simply pull the throttle stick
to minimum within five seconds of hearing the programming tones
noted in step C above. This will change the state of the brake
setting - if the brake was on this will turn it OFF, and vice-
versa. You can determine which setting is active by listening to
the arming tone. One tone indicates that the brake is enabled, and
two tones indicates that the brake is disabled. Skip to Step 8 if you
do not wish to make any other programming changes. To CHANGE ANOTHER
programmable feature disconnect the battery from the ESC and return
to Step B above."
Electrifly's RimFire motor (GPMP4500) is capable of handling up to
11 amps of current. This BL-8 ESC puts out a maximum of 8 amps of
current. When putting a BL-8 ESC and a RimFire motor into any
ElectriFly FlatOut airplane AND USING THE RECOMMENDED PROP, the
motor/ESC system will not need more than 8 amps. The motor will
not try to draw more current than the BL-8 ESC can deliver WHEN THE
CORRECT SIZE OF PROPELLER IS USED. This motor/ESC combo is
perfectly matched to the performance of the FLATOUT SERIES OF
PLANES AND THEIR RECOMMENDED PROP SIZE as well as similar type
airplanes. However, when putting a RimFire in a bigger model
which WILL need more than 8 amps, the BL-8 ESC will not be
powerful enough to deliver the maximum current that the motor will
require, and a larger ESC will be necessary.
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