Better parts. Better servos. The formula is simple.

760µs/560Hz (tail rotor gyro only)

Price: $79.99

    Item #: DS120BLHV
    Availability: In stock
    Usually ships In the same business day

    Crafted expressly for tail rotor applications (760µs/560Hz) where high performance is required in a standard-size package, this may be the perfect tail rotor servo for your Goblin 630, Pantera P6, T-Rex 600, or any 700-class model. These are the highlights;

    1. Features a brushless motor. Electronic commutation means there's no excess heat and 5X longer life because electrons don't wear out.

    2. To reduce weight we created a composite case. Instead of a simple extrusion, we CNC-machined the center case from a solid billet of 6061-T6 aircraft aluminum. Next, we mold the upper and lower case sections with tough Nylon 6,6 and to reinforce it, we press bronze inserts for the gear shaft pockets. The composite construction results in a case that's significantly lighter than an all-aluminum case, which because the tail rotor servo is behind the main shaft helps the CG without sacrificing strength.

    4. The case is assembled with 10 (ten) Allen-head machine screws instead of four (like competing designs) for greater rigidity.

    5. Dual dual ball bearings? Yes, of course, but instead of ordinary ABEC-3 bearings, this servo has two ABEC-9 bearings for ultra high precision.

    6. You also get metal gears, and key to higher speed is using lightweight gears (25T spline). Added to which, these gears are wider than usual thus increasing the surface area for long wear.

    7. Optimized for high voltage (HV) battery packs (7.4V nominal) or 8.4V from a BEC.

    8. Since centering is the sine qua non for a high performance servo, this servo has MIL-SPEC components. Along with a genuine Nobel potentiometer, this means the best possible performance because we don't compromise in our goal of building the best mini-size servo money can buy.

    9. If you believe protecting the electronics against vibration is important then you'll be happy to learn how instead of a cheapo piece of foam we protect the electronic components of the PCB (printed circuit board) against vibration with potting compound. This is exactly how the military and NASA bullet proof their electronics. And quite honestly, it's a pain in the hind quarters, but we think of it as going the extra mile because like you, we're modelers too. Or put another way, we fly what we sell.

    Bottom line? The ProModeler tail rotor servo is the one you want because it's better. It's better because it's brushless, strong, fast, and centers superbly. It's plenty strong for models up to 800-class.

    Overall Customer Rating of 3 Reviews:

    Still buttery smooth after 3years!


    First thing I noticed is the DS120BLHV moves the tail very crisply - and fast! In service since January 2015 it’s been very reliable despite a handful of crashes. It's buttery smooth and performance is great. Thank you for making a great product and providing top notch customer service!

    - Viktor Zorin, Gasselterboerveenschemond, Netherlands

    Per WikiPedia - Gasselterboerveenschemond is a hamlet in the Dutch province of Drenthe. It is a part of the municipality of Aa en Hunze, and lies about 21 km east of Assen. It is the longest placename of the Netherlands that is written as one word. (editor)

    Excellent Tail Servo


    I have been flying this servo with Vbar Neo and Futaba CGY750 with great success. This servo has the holding power, speed, and precision to propel your helicopter in fast tail forward flight and I recommend it without any reservations.

    - Mark Dean, Suitland, MD, Team Synergy

    The U.P of Michigan

    Blazing fast, great centering!


    Fantastic servo! Blazing fast, great centering, the o-ring seals are great as the tail servo is usually the one that gets a bath in nitro exhaust oil.

    - Will Verley, Kingsford, MI