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  Radio Accessories > Servos > Servos - Brushless Bookmark this Page

Futaba - FUTM0521 FUTBLS251 BLS251 513886204180 4513886204180
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  Tech Notes

Possible Substitutions

Replacement & Optional Parts

Parts Compatibility

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Futaba BLS251 Brushless Heli Rudder Servo
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Futaba BLS251 Brushless Heli Rudder Servo
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Parts Saver Eligible:Yes

Stock Number
Stock Status
Possible Substitutions

Tech Notes
        This is the Futaba BLS251 Brushless Digital Heli Rudder Servo.
           Designed specifically for helicopter rudder operation.

***Compatible with the Futaba GY520, GY601, GY611 and GY701 gyros.***

This servo can produce high-current draw from your batteries. If using NiMH or LiPo batteries, make sure they are capable of delivering sufficient amps.

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 Metal gear Compatible with Super Narrow Pulse of (760Ás) drive. One-year warranty

INCLUDES: Futaba BLS251 Brushless Digital Heli Rudder Servo with universal connector, 0.83" (21mm) diameter round horn pre-mounted 1.8" (45mm) diameter round horn 1.2" (32mm) diameter 6-point horn 1.5" (38.5mm) 4-point horn Servo mounting hardware

REQUIRES: Installing in helicopter and plugging into gyro

SPECS: Torque @ 4.8V: 53 oz-in (3.8 kg-cm) Speed @ 4.8V: 0.06 sec Dimensions: 1.6 x 0.8 x 1.5" (40 x 20 x 36.8mm) Weight: 2.1oz (59.5g)

COMMENTS: This servo will NOT work with the GY240 or the GY401 gyros.

jxs 6/25/07 updated 11/09/07kh ir/jxs updated jpg 2/14/08 updated rda 4/2/08 updated jpg 8/13/09

– If you need more information, use these Futaba resources –
Click Here: Manufacturer's Product Web Page
Web Site:
Phone: 217-398-8970
  Postal Address:

Click here for Units of Measure Conversion Calculators

Parts Compatibility
Parts Compatibility for Futaba BLS251 Brushless Heli Rudder Servo
This item is an optional part for the following:
 LXAATC Futaba GY701 Governor  (Parts List)

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