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Blue Bird BMS-105HV Servo - 0.09s 10.9g 10mm

Product Code: BMS-105HV
 (22 reviews)

Price: $23.78

More than 20 in stock


The Blue Bird BMS-105HV is a the highest torque servo in the very highly regarded Blue Bird BMS-105HV/106HV/107HV range of 10g servos. At 8.4V the BMS-105HV's torque is 5.3 while still having an excellent speed of 0.09 seconds per 60° of movement.

The Blue Bird BMS-105HV is a great HV servo built to the same space saving form factor as the MKS HV6100. It is similarly precise, with no free play in the geartrain, and it is even more powerful and 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 accesories.

HyperFlight is pleased to be able to supply the complete range of this excellent and increasingly popular range of Blue Bird servos. Many expert modellers are fitting these servos to the latest ultralight F5J models like the Ultima and the Infinity.

Note this servo used to be called the Kawatomo CB-1005HV and some products (eg bearing servo frames) still refer to it under this old part ID.

Blue Bird BMS-105HV/Kawatomo CB-1005HV Specifications
Body dimensions 22.5 mm wide x 10.0 mm thick x 22.8 mm high 0.89" wide x 0.39" thick x 0.90" high
Max dimensions 32.5 mm wide x 10.0 mm thick x 25.0 mm high 1.28" wide x 0.39" thick x 0.98" high
Stall torque / Speed @ 6V 4.1 / 0.12 s/60° 57 / 0.12 s/60°
Stall torque / Speed @ 7.4V 4.8 / 0.10 s/60° 67 / 0.10 s/60°
Stall torque / Speed @ 8.4V 5.3 / 0.09 s/60° 74 / 0.09 s/60°
Weight 10.9 g 0.38 oz
Lead length 15 cm 6.0 in
Operating Voltage 6.0V - 8.5V
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 1000 - 2000 µs
Digital Yes, 12 bit A2D
Programmable No
Position sensor Potentiometer
Operating temperature -20 to +60 ºC
Supplied accessories 2 plastic output arms, 1 arm retaining screw, 4 mounting screws, sticker set
Optional accessories Frame with bearing for the Blue Bird BMS-105HV, Integrated Drive System/Mono for BMS-105HV, Frame for MKS DS6100

Reviews 22  

 Review by:

What a little powerhouse!

I originally ordered these for a Snipe precise, so fast and so small! Loved it. It has since become my go-to servo for rudder/elevator in F5J/ALES competition planes. Absolutely love them. I have 8 of them in operation on my 4 contest ships and I've never had an issue.

Again- these are fantastic servos, fast, precise and about 30% cheaper than those other brand's servos. I highly recommend them! They are also great for wing servos in gliders (with the IDS servo frames that Neil sells.)

Buy with confidence!

Jay D

 Review by:

Have not installed servos into glider yet.
Satisfactory test with servo tester.
Excellent service and delivery.
No buzzing.
Very pleased

 Review by:

satisfied customer from Belgium

After a few days, the Bluebird BMS 105 hv. servo supplied. There was a servo that kept running around, but the servo cable was already removed by me, to make it easier to install in the wings so the guarantee was canceled and could not be exchanged. I received a 50% discount on a purchase of a new servo, which I did. Again after a few days this was delivered, which is an excellent service.
I have not yet been able to test the servos in practice, but I am confident. In any case, the servos are fast and play free.


 Review by:

F5J Glider

Very good servo.Low price!!!

 Review by:

Quick, Strong, Low noise, Good price

 Review by:

Quick, hard, precise !

Works great on the V-Tail of my X2-F3F-Sloper! Withstands 180 mph DS-ing....

 Review by:


Top Servo for all functions

Comment by:


I bought from you Blue Bird BMS-105HV Servo - 0.09s 10.9g 10mm.the servo problem. not holding point.
He has a sailboat!I ask replacement!

 Review by:

Great servo, purchased ten, waiting to use in models, although have used my jeti servo tester...testing shows good results at 6 volt and 7.2.

 Review by:

I am happy with these Servos. They are very powerful, with good centering, no slop in the geartrain and no ugly noice!
Use them all arround in an NAN Xperience Pro f3j. So far everthing is good. In use since two month, about 10h airtime.
As allways great service and support from Neil!!!

 Review by:

The servo works exactly and vigorously I would at any time I buy it as a servo for a V control unit in a F3J glider

 Review by:

Very good servo, center's very well, very fast and working at 5 V also. The gear and the case are stronger than his opponent's, MKS 6100.

 Review by:

More than Sufficient!

A great alternative to the equivalent MKS, KST, ATLAS etc, at almost half the price. The servo is powerful with good centering, no slop in the geartrain and no noice!!

 Review by:

Great servo

Great servo for the price powerful, good centering, no slop in the geartrain. Quality of a higher price point servo I'm using them in my f3j and f5j models for rudder and elevator. So putting a lot of trust in them.

 Review by:

Great servo great service

A superb alternative to the equivalent MKS at almost half the price. We have eighteen of these in regular use with no issues.
The usual excellent service from Hyperflight of course.

 Review by:

After use report

This is an after use report. Two of the BMS-105HV servos I purchased and using for flaps have completely failed in flight and at the same time. They were being used at 6 volts. Not sure I will purchase again.

 Review by:

Bluebird CB 1005HV/Kawatomo 10mm 10.9g se

These little servos are gems! I believe that in many ways they are superior to the Mks 6100 that they resemble so closely. Zero slop, superb resolution and entering with quite amazing power and speed.
For less than 20 they are quite remarkable, we have a dozen of these in service and they all behave and sound the same!

 Review by:

Kawatomo (blue bird) cb-1005HV servo

As a devotee of MKS 6100 servos I had to try these,but didn't expect too much. I bought four, they sound and before identically to each ,centre perfectly and are at the very least as fast and powerful as the originals. I will certainly buy more. Of course the service from hyperflight was as usual superb.

 Review by:

good servo but better all and Neil for after market service!

 Review by:

Excellent servos, very good centering and very good price!!

Comment by:

Blue Bird CB-1005HV

A very nice servo that centre's well, is quick and not too expensive. Although not installed in a glider they perform just fine in my EDF Hawker Hunter. They are much better at returning to centre than some of my recent Hitec purchases. Recommended.

 Review by:

At last! Excellent Micros at a reasonable price.

All five servos are excellent! No play and exact centering. First rate service from Hyperflight.

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