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06-10-2009, 12:17 PM
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dchin62973
Join Date: Jun 2008
Location: Smithtown, NY
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RE: Esky Honey Bee
I also modified the E-SKYHBFP to run using an 11.1 volt LIPO. The main reason was after installing the super skids 300 landing gear system, the heat sinks on the main motor and tail
motor, metal flybar rods, metal tail boom struts, metal rotor head core, titanum tail boom from super
skids, ON/OFF switch, etc, the heli weighed in at about 13 ounces. A standard 7.4 volt LIPO could
not lift the heli more than 2-3 feet above ground. The solution was to get a bigger 380 carbon brushed
motor or use a larger battery. The problem with a 380 motor is that its RPMs are too high and will
cause minor spinning as the tail motor cannot compensate. Not good when doing high speed flying or turning.
My answer - Go to a brushless motor setup with an 11.1 volt LIPO battery. T
he motors are lighter and more efficient th
a
n a regular carbon brushed motor. The carbon brushed
motors heat up during flight and heat sinks are required. You also have to wait until the motor cools
down before flying again otherwise risk the longevity of the carbon brushed motor. Brushless motors
run luke warm to the to the touch. No more heat sink heats b
ecause the brushless motor are governed by an ESC. There is less strain on the Rx thus reducing RF
noise and glitches.
[/list]
No
more fuses are
required between the main motor and Rx
since the ESC will bear the brunt of the
backlash. The MOSFET circuit in the ESC should be able to handle most crashes without possible
burnout to your RX
.
However, you
still need an
ATO 3 Amp Fast blow fuse
for the tail
motor since the
tail motor is still carbon brushed.
The typical
370 carbon bru
s
hed motor
lasts on average about 150 flights
using an
11.1 volt LIPO
battery
before burnout. A brushless
motors has no brushes to wear out. Hence a virtual long life span
.
Which
means you
can fly all day as long as you keep on
changing the LIPO battery.
[/list]
Finally, the brushless motor looks cooler as they are CNC machined made to precision
.
[youtube]http://www.youtube.com/watch?v=0CeYpyu_Z8c[/youtube]
[/list]
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