Los dos son servos normalillos.
FUTABA S3001 UNOS 16 EUROS
Control System: +Pulse Width Control 1520usec Neutral
Required Pulse: 3-5 Volt Peak to Peak Square Wave
Operating Voltage: 4.8-6.0 Volts
Operating Temperature Range: -20 to +60 Degree C
Operating Speed (4.8V): 0.23sec/60 degrees at no load
Operating Speed (6.0V): 0.19sec/60 degrees at no load
Stall Torque (4.8V): 44 oz/in. (3.2kg.cm)
Stall Torque (6.0V): 57 oz/in. (4.1kg.cm)
Operating Angle: 45 Deg. one side pulse traveling 400usec
360 Modifiable: Yes
Direction: Counter Clockwise/Pulse Traveling 1520-1900usec
Current Drain (4.8V): 7.2mA/idle
Current Drain (6.0V): 8mA/idle
Motor Type: 3 Pole Ferrite
Potentiometer Drive: Indirect Drive
Bearing Type: Ball Bearing
Gear Type: All Nylon Gears
HITEC UNOS 16 EUROS
Control System: +Pulse Width Control 1500usec Neutral
Required Pulse: 3-5 Volt Peak to Peak Square Wave
Operating Voltage: 4.8-6.0 Volts
Operating Temperature Range: -20 to +60 Degree C
Operating Speed (4.8V): 0.19sec/60 degrees at no load
Operating Speed (6.0V): 0.15sec/60 degrees at no load
Stall Torque (4.8V): 42 oz/in (3.0 kg/cm)
Stall Torque (6.0V): 51 oz/in (3.7 kg/cm)
Current Drain (4.8V): 7.4mA/idle and 160mA no load operating
Current Drain (6.0V): 7.7mA/idle and 180mA no load operating
Dead Band Width: 5usec
Operating Angle: 40 Deg. one side pulse traveling 400usec
Direction: Clockwise/Pulse Traveling 1500 to 1900usec
Motor Type: Cored Metal Brush
Potentiometer Drive: 4 Slider/Direct Drive
Bearing Type: Top Ball Bearing
Gear Type: Heavy Duty Resin
360 Modifiable: Yes
Connector Wire Length: 11.81" (300mm)
Dimensions: 1.57" x 0.79"x 1.44" (40 x 20 x 36.5mm)
Weight: 1.52oz (43g)
Futaba lleva rodamientos y algo más de fuerza. Hitec es un poco más rápido. Para lo que dices querer hacer cualquiera te vale. Por preferir a mismo precio, el futaba..