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Futaba BLS251SB Brushless Heli Rudder High-Speed S.Bus2 Servo
[F-BLS251SB]

Model No.: F-BLS251SB

Price: US$124.80

Availability: This product is currently SOLD OUT
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Futaba BLS251SB Brushless Heli Rudder High-Speed S.Bus2 Servo

Best match for your 500/600/700 class+ helicopter!!

New S.Bus / S.Bus2 version of the BLS251 rudder servo!

The Futaba BLS251SB is a digital rudder servo designed for tail rotor control of helicopters. It succeeds the BLS251 with its new S.Bus feature and is directly programmable by the FASSTest 18MZ radio system. The is a ultra-fast and powerful rear brushless digital servo with metal gears and 2 double ball bearings. Its aluminum case helps dissipates heat fast.

BLS251SB Servo Features:
Equipped with a Brushless motor that lasts longer and operates at a lower temperature than Brushed motors
Samarium Cobalt magnets and dual ball bearings
30% faster response times, smoother operation.
Same power consumption and centering as Digital servos equipped with
Brushed motors
Standard size
Metal gears
Compatible with the Futaba CGY750, GY701, GY520, GY430, GY601 and GY611 gyros only. DO NOT work with GY240 or GY401.

BLS251SB Servo Specifications:
Control System: +Pulse Width Control
Neutral Pulse Width: 760us
Required Pulse: 3-5 Volt Peak to Peak Square Wave
Operating Voltage: 4.8 Volts
Operating Temperature Range: -20 to +60 Degree C
Operating Speed (4.8V): 0.06sec/60 degrees at no load
Stall Torque (4.8V): 52.8 oz/in. (3.8kg.cm)

360 Modifiable: Yes
Motor Type: Brushless Motor
Potentiometer Drive: Indirect Drive
Bearing Type: Dual Ball Bearings
Gear Type: Nylon with final output gear metal
Connector Wire Length: 12"
Dimensions: (40.6 x 20.3 x 38mm)
Weight: 2.2oz. (61g)


Package Included:

  • 1 x Futaba BLS251SB Brushless S.Bus2 Servo
  • 1 x 1.8" (45mm) diameter servo wheel
  • 1 x 1.52" (38.5mm) 4-point servo horn
  • 1 x 1.2" (32mm) 6-point servo horn
  • 1 x Instruction Sheet


RC711 recommends Futaba BLS251SB servo to use for rubber/tail servo on 500/600 class EP helicopters or 60/90 class GP helicopters.

This product was added to our catalog on Tuesday, 13. May 2008.
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