The HK Mi Series servos represent the next break through in high precision servo technology. Using Magnetic Induction, rather than a potentiometer, for an unsurpassed level of accuracy and performance.
It is rated to 7,4V So I suest not to use a 2S LiPo, because it has 8,4V fully chrged. A 2S LiFe is fine, but be sure not to use a so called receiver LiFe with 5C rating only, thatß*s not good. Use a 20 or 30C LiFe instead cause this servos may take high peaks of current. I use it on the tail with 6V and it is fast like a flash.
After turning your helis tail, it does not stop, it nails on. :-)), even though it runs smooth and has much torque also. So this is a "all you may want to have" servo.
Bought 4 to install into my new 3DHS 71" AJ Slick electric. They use a Futaba spline, but since it comes with strong arms as well as standard arms, I found no need to upgrade. The leads are 30cm long which leave the perfect amount outside the wing to connect the ailerons on the AJ Slick. They use the JR connector for universal compatability. They are super fast to the point they will follow a bouncing stick if you let it go. Has serious power to not faulter under the strain of a fullspeed snap roll. This does come at the price of high current, and they are noisy when holding a particular position that is at a fractional step, but a click of trim usually shuts them up. I found this to be a nuisince at most as it just tells me how hard these servos work to keep a precise position. I was a bit weary about using them in a high performance investment like the Slick, but so far I don't reget it at all!
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I buy this servo and place inside my rc sakura s. this servo so fast and so accurate. I just use Flysky GT3B radio. The result is incredible. I recommend for everyone need cheaper servo.
This servo is outta this world. I am using in my 1/10th scale VTA car. Fits perfectly in the Team Associate Tc5. Super fast and amazing torque. Also it stays really cool with the metal housing and I have not had one issue yet.
I received this servo today and already placed it in my 1/10 electric touring car.
It has an insane speed and very good feel.
I need to test it in the race track but first impresion is that this is a high end racing servo!