HK15158A Digital BB/Coreless Mini Servo 25g / 2.8kg / 0.07s (USA Warehouse)

 william 46 points

Its plenty fast enough, only issue i would see is the Jr Plug, the Futaba plug is different... I planned to use this servo on my hk-500 but ended up going with a DS-525m..... Shouldnt be to much trouble to change the plug out, never tried so I couldnt really say, I run all JR Plugs

 2Doggs 274 points

the only difference between the JR plug and the Futaba is the JR lacks the polarity fin - so JR plugs will always fit Futaba RX's. This servo should work fine with the GY401, but I've had five of these burn out after around 100 flights on the tail of a ZYX equipped 450. The motor seems a bit fragile.

 william 46 points

MG-930 isn't very good tail servo to slow, would be a good ccpm servo though. Personally i like the Corona DS329MG for CCPM (it has better torque and a little faster then the 930) and then this HK15158A for the tail.

 2Doggs 274 points

I'm not sure anyone does a metal gear version - this is aimed mainly at tail use in a heli, where metal gears are not really an advantage.

 william 46 points

You running these on the swash or tail?? If your looking for a swash servo try Corona DS329MG or the MG-930 Roger suggested, as for a tail servo this is the best i've found so far.

 2Doggs 274 points

Probably not too well, since it only uses plastic gears.

 2Doggs 274 points

Yes, it's a good fit in the tail servo mount, though you need to use servo nuts and not use the rubber grommets. It can be set to run at 1520us/333Hz, i.e. D/S mode on the 401b. My main grips with this servo is that it has a bit of backlash in the gears, but it can work pretty well on a 450 tail. Do yourself a favour though, and get a better gyro! The GA-250 or GY-520 (from another seller)are both mini0mems gyros, and much better than the 401b.

 krashNburn 68 points

This servo works great for me (sport flying so far). 6 flights back to back on EXI450 Pro. Setting at 1520/70hz on assan GA250 gyro 68%. Comes down cold as a cucumber after 8 minute flights. Power is 2200mah 40c, turnigy helidrive sk3 motor 3600kv, 40a skywalker esc. Weather temp today at 52 degrees F. Am going to put this servo in my HK450v2 soon!!

 CHRIS SV AZ 193 points

yes you can. they fit perfect for the cyclic but i do not recomend them for the tail. i burned up 1 on a 500 tail and 1 on a 450 tail. cyclic no problems and very fast

 Liftforward 14 points

Yes, however I would recommend using a metal gear servo on the 500.

 earl 6 points

I second that! Definately want to use metal gear servos for a 500. Had these servos and they strip out really easy.

 2Doggs 274 points

Most tail servo burning up incidents are caused by binding in the tail linkage, which can quickly creep up on you. Keep that tail lubed! lots of people use them on 450 tails, and they would be a very low cost solution for a 500 tail. Fair bit of slop in the gears though, but then for $7....

 CHRIS SV AZ 193 points

leave it set to 1520. i used this servo on a 401b and an align gp750. align was set to 1520 and hk-401 does not have option to adjust

 2Doggs 274 points

I think it would only be safe to set the gyro to 80Hz - which the latest GA-250 will allow, There are so many reports of the servo burning out that I reckon there's a good chance it can't work at more than 80Hz.

 2Doggs 274 points

In fact I now think it's more likely that the servo an only run on 4.8v. I just killed mine on its 8th flight at 5.9v, 333Hz.

 krashNburn 68 points

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