760µs/560Hz (tail rotor gyro only)

Price: $99.99

    Item #: DS120BLHV
    Availability: Out of Stock notify me

    Before adding this servo to your cart

    This 120oz-in servo is suitable for helicopter tail rotor applications only! This means neutral is 760µs instead of the 1520µs of servos connected directly to a receiver. Basically, a receiver's servo output sensitivity doesn't extend low enough to signal this servo - it responds only to gyro output.

    This servo represents great value 'and' outputs more torque than our competitors - for when high performance meets a budget - all in a standard-size package! Representing perhaps the perfect tail rotor servo for your Goblin 630, Pantera P6, T-Rex 600, or even 700-class models; these are some 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. Plus, we CNC-machined the center case from a solid billet of 6061-T6 aircraft aluminum instead of using cheapo pot metal. And ours, with cooling fins reduce operating temperatures compared to smooth side servos helping better keep things in check when the servo motor is working hard. Fins increase cooling area to better shed electronic-destroying heat!

    3. Then, to reduce weight, 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. This 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. finally, the case is assembled with 10 (ten) Allen-head machine screws instead of four (like competing designs) for greater rigidity.

    5. Beyond ordinary dual ABEC-3 ball bearings, this servo has been equipped higher precision dual ABEC-9 bearings for an ultra smooth feel.

    6. You also get all-metal gears (no plastic), and key to higher speed is using lightweight 7075 hard anodize (25T spline) output (the largest gear in the gear train). 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. Note; 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. In closing, 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 DS120BLHV tail rotor servo is probably the one you want because it's better than what competitors offer. It's better because it's brushless, strong, fast, and centers superbly. Note; if weight is a concern, or if you want our very best tail rotor servo, then eyeball our DS95BLHV mini, instead, because it's plenty strong for models up to 800-class but of course, this one costs more. And yes, we acknowledge the irony in our mini-class being considered our top-of-the-range but it is, what it is!

    Overall Customer Rating of 9 Reviews:
    Fort Worth

    The quality and design are top notch.

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    Sometimes it seems as we advance in our hobby, we can become a little 'snobby' about brands and part cost. It's understandable, we have a lot invested and want the best performance possible. But, if this was a 'Prada' or 'Hermes' brand costing 3X as much, I bet they'd be in all the designer helis - don't get any ideas, John! Anyway, this in my soXos Strike 7 and paired with exceptional hardware and electronics where it's a perfect match! The quality and design are top notch.



    One of the best heli t/r servos period!.

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    So I had finally settled down and decided to build my own electric 3D machine, as opposed to buying used machines . . . a little background info; I've been flying helicopters for close to 30 years and advancing continually. I have my own style of flying that is heavily reliant on the tail rotor, some flights consist of constant pirouette maneuvers; yes, pirouetting tick-tocks,  pirouetting-flips, pirouetting-loops during the entire pack. Not really smack flying necessarily (but I gravitate there occasionally).


    Being heavily into pirouette work, I need a tail rotor servo that delivers power in a very defined manner. It needs to possess the ability to hold a yaw input whether it varies or not for the entire pack without getting hot. It also needs to give me fine minute adjustments with authority. Anyway, this DS120BLHV is a decently powerful servo that can tackle large tail rotor inputs without stalling, but still have that silky feeling back at the sticks. This is something I've only felt with the ProModeler servos.

    Then there's the build quality. They look like they were built with a specific purpose, and then there's the great summary on the care that went into making this servo. Don't get me started on price comparisons of the competition because, there is no competition. These servos have power, precision, excellent build quality, and a great price point. Plus a live person you can easily reach out to if you have concerns.


    When I was searching for servos for this build I was overwhelmed by how many servo manufacturers were out there . . . and I noticed many of them had catchy graphics on them. Yeah, but what's inside? Dang you're expensive, how's the support? Anyway, while I'm sure many of those servos are great performers, they lose me out on the price point and don't have all attributes I mentioned earlier.


    Anyway, John, you make the best servos, thanks!


    Buda TX

    Perfect

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    So I bought this 760us tail servo and 1520us cyclic servos to go into a KDS 5.5. After 3 months of flying the servo is still performing perfect. Tail was super easy to tune using Brain 2 FBL. I am now going to move it over to a XL Power 550. Also ordered mini servos to match. So far I am impressed with the servo quality.


    Tacoma

    Great Servos

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    Have all 4 for my Logo 550 good quality, and really good price.

    Alabama

    Excellent Quality & Customer Service!

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    I don't think you can find a better quality servo at this price point. And Made in the USA! Not to mention, the customer service is the best! Thanks John for an amazing product!

    Ohio

    Awesome tail servo!

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    I only have a few flights on this servo. However, it works very well. Stops are crisp and hold power is great! Excellent product at a great price point!

    Still buttery smooth after 3years!

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    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

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    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!

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    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