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Blue Bird BMS-127WV Servo - 4.8Kg.cm 0.05s 11.3g 10mm

Product Code: BMS-127WV
 (4 reviews)

Price: $22.67

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Description

The Blue Bird BMS-127WV is the highest speed servo in the new Blue Bird BMS-125WV/126WV/127WV range of 11g servos. At 8.4V the BMS-127WV's speed is an amazing 0.05 seconds per 60° of movement. The torque is slightly compromised but is still a very good 4.8 Kg.cm. It is suitable for all ailerons and elevators on lighter F5J models, most gliders up to 3 m wingspan and many RC sports models and helicopters. It is especially good for heli tail rotors. At 10 mm thick it is suitable for mounting in small fuselages and thin wings and tails.

The WV in the name stands for Wide Voltage, indicating that this servo has wide range of acceptable supply voltages and is suitable for 1S LiPo, 4 or 5 cell NiMH and 2S LiPo operation.

The Blue Bird BMS-127HV is a great servo built to the same space saving form factor as the MKS DS6100 and HV6100. It is similarly precise, with no free play in the geartrain, and is much faster than the competing product. The large output spline is identical to Futaba 25 tooth splines, so replacement output arms are readily available. Note the output spline is not the same as MKS so the servo cannot be used with most MKS accessories.

Although looking like the BMS-105HV, the BMS-127 WV uses new components and an improved internal design and does not suffer the longevity problems that affected some high hours BMS-105 installations. The BMS-107HV was not affected by the problem anyway.



Blue Bird BMS-127WV Specifications
Body dimensions 23.2 mm wide x 10.0 mm thick x 23.0 mm high 0.91" wide x 0.39" thick x 0.91" high
Max dimensions 32.0 mm wide x 10.0 mm thick x 25.0 mm high 1.26" wide x 0.39" thick x 0.98" high
Stall torque (3.7V) 2.1 Kg.cm 29 oz.in
Stall torque (6V) 3.4 Kg.cm 47 oz.in
Stall torque (8.4V) 4.8 Kg.cm 67 oz.in
Weight 11.3 g 0.40 oz
Lead length 16 cm 6.3 in
Operating speed (3.7V) 0.11 sec/60°
Operating speed (6V) 0.07 sec/60°
Operating speed (8.4V) 0.05 sec/60°
Operating voltage 3.5V to 8.4V
Operating temperature 0 to 40 °C
Bearings Plain
Gear material Metal alloy
Case material Nylon
Motor type Coreless DC motor
Working frequency 250 Hz
Dead band/resolution 2 µs
Pulse width for ± 60º (L) 900 µs - (0°) 1520 µs- (R) 2100 µs
Digital Yes
Programmable No
Position feedback Potentiometer
Supplied accessories 2 plastic output arms, 1 arm retaining screw, 4 mounting screws, Blue Bird sticker
Optional accessories Ply Frame for Blue Bird BMS-125WV

Reviews 4  


 Review by:

Replacement for BMS-106HV

Had a Bluebird BMS-106HV fail in my AHI wing so I bought a couple of these as a straight replacement. They fit perfectly.
Ordered at 14:30 hrs and received them first thing the next day. Thanks Neil for your excellent service.


 Review by:

not as aspected.

the servo looks strong as expected but makes continuous noise. even at the neutral point. I hope it lasts long enough


 Review by:

bought for a Snipe RES glider, for the "S", very powerful. probably on 1s will be used.


 Review by:

Good servo for micro helis

Great cyclic servos for micro helis, can also be used on the tail if run on 8v. They will fit an Oxy2 but you need to sand about 0.3mm off the end of the lower mounting tab and make sure it's pushed up against the upper bearing block when installed so the end of the tab won't brush the screws on the maingear assembly. These servos run at 250hz maximum so make sure you change the servo frequency in the FBL controller setup before plugging them in.


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