Part comparison

Blue Bird BMS-28A vs Futaba S9177SV

A side-by-side comparison of source-backed specifications within the same subcategory.

14 shared specs4 scored

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No imageBlue BirdBlue Bird BMS-28ABMS-28A

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FutabaFutaba S9177SVS9177SV

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Directional spec summary

Counts across 4 numeric specifications with a clear higher-or-lower direction.

Part A leads

Tied

Part B leads

These are metric-by-metric differences, not an overall performance score. Check the values below.

Specifications

14 specifications compared side by side.

Blue Bird BMS-28A / Futaba S9177SV
Compare bySpecification	ABlue BirdBlue Bird BMS-28A	BFutabaFutaba S9177SV
Physical1
Weight	74 g	74 g
Performance3
Stall torque	2.746 Nm	4.021 Nm1.275 Nm higher
Stall torque @ 7.4V	28 kg·cm	41 kg·cm13 kg·cm higher
Speed @ 7.4V	0.1 s/60°0.01 s/60° lower	0.11 s/60°
Electrical2
Minimum voltageUse-dependent	6 V	4.8 V
Maximum voltage	7.4 V	7.4 V
Mechanical & integration4
Motor kind	Rc servo	Rc servo
Drive principle	servo actuator	servo actuator
Architecture	Integrated servo module	Integrated servo module
Gear material	metal	metal
Control & communication3
Communication interfacesUse-dependent	PWM	PWM;S.Bus2
Control modesUse-dependent	PWM servo	PWM/S.Bus2 servo
Servo signal	PWM	PWM
Other specifications1
PWM pulse center	1500 µs	1500 µs

ABlue BirdBlue Bird BMS-28A

BFutabaFutaba S9177SV

Physical1

Weight

Part A74 g

Part B74 g

Performance3

Stall torque

Part A2.746 Nm

Part B4.021 Nm1.275 Nm higher

Stall torque @ 7.4V

Part A28 kg·cm

Part B41 kg·cm13 kg·cm higher

Speed @ 7.4V

Part A0.1 s/60°0.01 s/60° lower

Part B0.11 s/60°

Electrical2

Minimum voltageUse-dependent

Part A6 V

Part B4.8 V

Maximum voltage

Part A7.4 V

Part B7.4 V

Mechanical & integration4

Motor kind

Part ARc servo

Part BRc servo

Drive principle

Part Aservo actuator

Part Bservo actuator

Architecture

Part AIntegrated servo module

Part BIntegrated servo module

Gear material

Part Ametal

Part Bmetal

Control & communication3

Communication interfacesUse-dependent

Part APWM

Part BPWM;S.Bus2

Control modesUse-dependent

Part APWM servo

Part BPWM/S.Bus2 servo

Servo signal

Part APWM

Part BPWM

Other specifications1

PWM pulse center

Part A1500 µs

Part B1500 µs

Product sources

Product sources used by this comparison

Blue Bird BMS-28AOpen source ↗

Futaba S9177SVOpen source ↗