|01-30-2015, 10:41 PM||#1|
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I am: John C
Join Date: Mar 2012
Location: Kitchener ON
Radio of choice:
# of RCs: 10+
Feedback: 30 / 100%
Total Props: 2
JR 8911HV Servo
Model Number: 8911HV
Power Plant: Other - See message area.
New or Used: Item is used but excellent condition.
Trades: I am interested in possible trades.
Asking Price: $125.00
Accepted forms of payment: EMT, Cash, Money Order
Shipping : I will ship at buyers expense.
My Location: Kitchener On N2N1T7
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I have 1 JR 8911HV Servo that I took on a trade. I have no use for this.
•Designed for high-voltage—native 2S Li-Po operation
•Digital precision for increased accuracy and performance
•Provides high torque for large aircraft in a standard-size servo package
•Metal gears provide longer life cycle and a higher level of durability
The 8911HV servo is the perfect option for pilots who want the outstanding performance of JR's legendary servos without the high cost. The 8911 provides impressive torque for giant-scale applications and is covered by JR's outstanding 3-year limited warranty.
Battery chemistries such as LiPo, LiIon, and LiFe have become very popular within the RC community. They are the standard for powering electric motors and have also gained popularity as receiver battery packs. The issue is the output voltage of these batteries is higher then the previous standard 4 - and 5-cell NiCd and NiMH packs, 4.8V and 6V respectively. The higher voltage is not an issue with the receivers but can be for the servos. Many servos will not operate at these higher voltages for very long before burning out the motors or electronics.
To get around this issue modelers have had to use a regulator to drop the voltage to an acceptable operating range for their servos, usually around 5 to 6 volts. The addition of a regulator adds a component that, should it fail, can cause the loss of a model.
JR’s HV servos are designed with motors and electronics that operate off the direct voltage of a 2-cell LiPo, LiIon, or LiFe receiver battery pack (6.6V to 7.4V nominal voltage). This eliminates the need for a regulator and lowers the chance for a power failure that can cause a catastrophic failure of your model. Also note that the HV servo specs are shown at the higher voltage (7.4V 2S LiPo) but will still operate on a standard 5-cell 6V NiCd, Ni MH battery with a reduction in performance of approximately 10% in speed and torque.
Bushing Or Bearing: Bearing
Deadband: Less than .001ms
Gear Material: SuperSteel
Gear Type: Metal
Motor Type: Coreless
Digital or Analog: Digital
Servo Voltage: 6.0–7.4V (High Voltage)
Speed: .12 sec/60 deg; (2S Li-Po battery)
Torque: 470 oz-in (2S Li-Po)
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How high is too high?
When you ask yourself
Where did my plane go?
MAAC# 84894 / IMAC# 7441
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