Stall torque
Part A3.481 Nm0.539 Nm higher
Part B2.942 Nm
Part comparison
Blue Bird BMS-35A vs Hitec D840WP
A side-by-side comparison of source-backed specifications within the same subcategory.
11 shared specs3 scored
Directional spec summary
Counts across 3 numeric specifications with a clear higher-or-lower direction.
Part A leads
2
Tied
0
Part B leads
1
These are metric-by-metric differences, not an overall performance score. Check the values below.
Specifications
11 specifications compared side by side.
| Compare bySpecification | ABlue BirdBlue Bird BMS-35A | BHitecHitec D840WP |
|---|---|---|
| Performance3 | ||
| Stall torque | 3.481 Nm0.539 Nm higher | 2.942 Nm |
| Stall torque @ 7.4V | 35.5 kg·cm5.5 kg·cm higher | 30 kg·cm |
| Speed @ 7.4V | 0.14 s/60° | 0.11 s/60°0.03 s/60° lower |
| Mechanical & integration4 | ||
| Motor kind | Rc servo | Rc servo |
| Drive principle | servo actuator | servo actuator |
| ArchitectureUse-dependent | Integrated servo module | Rc servo module |
| Gear materialUse-dependent | titanium | Steel |
| 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-35A
BHitecHitec D840WP
Performance3
Stall torque @ 7.4V
Part A35.5 kg·cm5.5 kg·cm higher
Part B30 kg·cm
Speed @ 7.4V
Part A0.14 s/60°
Part B0.11 s/60°0.03 s/60° lower
Mechanical & integration4
Motor kind
Part ARc servo
Part BRc servo
Drive principle
Part Aservo actuator
Part Bservo actuator
ArchitectureUse-dependent
Part AIntegrated servo module
Part BRc servo module
Gear materialUse-dependent
Part Atitanium
Part BSteel
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-35AOpen source ↗
Hitec D840WPNo public source