Weight
Part A74 g
Part B74 g
Part comparison
Blue Bird BMS-28A vs Blue Bird BMS-35A
A side-by-side comparison of source-backed specifications within the same subcategory.
14 shared specs4 scored
No imageBlue BirdBlue Bird BMS-28ABMS-28A
VS
No imageBlue BirdBlue Bird BMS-35ABMS-35A
Directional spec summary
Counts across 4 numeric specifications with a clear higher-or-lower direction.
Part A leads
1
Tied
1
Part B leads
2
These are metric-by-metric differences, not an overall performance score. Check the values below.
Specifications
14 specifications compared side by side.
| Compare bySpecification | ABlue BirdBlue Bird BMS-28A | BBlue BirdBlue Bird BMS-35A |
|---|---|---|
| Physical1 | ||
| Weight | 74 g | 74 g |
| Performance3 | ||
| Stall torque | 2.746 Nm | 3.481 Nm0.735 Nm higher |
| Stall torque @ 7.4V | 28 kg·cm | 35.5 kg·cm7.5 kg·cm higher |
| Speed @ 7.4V | 0.1 s/60°0.04 s/60° lower | 0.14 s/60° |
| Electrical2 | ||
| Minimum voltage | 6 V | 6 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 materialUse-dependent | metal | titanium |
| Control & communication3 | ||
| Communication interfaces | PWM | PWM |
| Control modes | PWM servo | PWM servo |
| Servo signal | PWM | PWM |
| Other specifications1 | ||
| PWM pulse center | 1500 µs | 1500 µs |
ABlue BirdBlue Bird BMS-28A
BBlue BirdBlue Bird BMS-35A
Physical1
Performance3
Stall torque
Part A2.746 Nm
Part B3.481 Nm0.735 Nm higher
Stall torque @ 7.4V
Part A28 kg·cm
Part B35.5 kg·cm7.5 kg·cm higher
Speed @ 7.4V
Part A0.1 s/60°0.04 s/60° lower
Part B0.14 s/60°
Electrical2
Minimum voltage
Part A6 V
Part B6 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 materialUse-dependent
Part Ametal
Part Btitanium
Control & communication3
Communication interfaces
Part APWM
Part BPWM
Control modes
Part APWM servo
Part BPWM 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 ↗
Blue Bird BMS-35AOpen source ↗