Blue Bird BMS-127WV+ Servo Specifications | ||
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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) | 2.5 Kg.cm | 35 oz.in |
Stall torque (6V) | 4 Kg.cm | 56 oz.in |
Stall torque (8.4V) | 5.3 Kg.cm | 74 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 | 2 ball bearings | |
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-125, Integrated Drive System/Mono for the Blue Bird BMS-125WV, Frame with bearing for the Blue Bird BMS-125WV |
Review by: CTBUK
Truly brilliant servos. I now use them in all my 10-30e size 3D planes.
On 6v they are really fast and powerful. On 8.4v they are simply awesome!
Review by: Anonymous
Very fast, high quality, MG, BB small servoI've bought and used 3 different models of BBird servos. I've liked them all. This plastic case servo is fast, all MG, BB. No jitter. Under $25. The performance is comparable to KST at a lower price point. All BBird servos have a one year warranty. BBird servos are made in TW, which I think is a step above mainland Chinese quality.
Review by: Kjell
Strong, accurate and very fast servo.
Review by: Kev
Blue Bird servogreat little servo never have any issues with them
purchased a fair few from Neil over the years
excellent service
Review by: Chris Clark
BMS-127WV servoGreat speed and centring. And plenty of power, all in a very lightweight package.
Perfect match for my 1.1m 3D planes.
Review by: Lee Waples
Fantastic servo and excellent service as always.
VERY quick delivery and well packed.
Review by: Ian W
Blue Bird BMS-127WV servoI first used these servos in an RCRCM Typhoon a couple of years ago, in which they have performed faultlessly, being both fast, and accurate. I'm now installing them in another slope project, and recommend them, (and Hyperflight's service), highly.
Review by: Ross Cooper-Smith
Really nice alternative for both 9g and 14g servosI've been seeing good reviews online for Blue Bird, and picked up four of these to replace some 14g MG92B servos. Even on 5V they're a fast servo, not too noisy in operation, and they centre and hold very nicely.
And they definitely get bonus points for having the full specs on the box, and a small servo datasheet included showing you the dimensions, max angle throws, and operating pulse range.
Review by: Greg McGill (glidermang)
Servo Purchase OrderWhen local sources for Blue Bird servos dried up, I turned to Hyperflight. As per usual, they responded quickly and efficiently. Even after shipping, their price is competitive. Note: people purchasing from Hyperflight need to realize that shipping worldwide is slow these days, no fault of Hyperflight.
Review by: Dick
Replacement for BMS-106HVHad 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: Nuno Duarte
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: anick
bought for a Snipe RES glider, for the "S", very powerful. probably on 1s will be used.
Review by: Anonymous
Good servo for micro helisGreat 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.