Micro 3.7g Servo GH-S37D Mini Digital Servo

I'm new at Rc plane building, but found these to be working great. Thay are prity strong, in fact, strong enough to strip their own gears. I haven't stripped one yet, but maybe build better or limit the travel in your controller. If you hear it clicking thats a good sign it will strip. A+ I'll buy more for future projects :)

Bought the box of five... they arrived quickly. I tested all and they all worked. There is a fair amount of difference between them in the sound they make, with some of the gear-trains being quite noisy... but there seems to be no difference in function. Travel was fairly uniform between them, and position repeatability was adequate for what I'm using them for. They are not the "quickest" of servos. These will all be going in sub 250 gram casual fixed wing fliers and in that application these will be just fine. As someone that has been in this hobby for 50+ years, I'm amazed at how far down the price curve RC gear has come.

For those who don't already know, the 3.7g rating refers to the weight of the servo itself with no wires or servo arm. This doesn't make a lot of sense, because you can't use the servo without the wires and servo arm. This is normal for most servos listed as 3.7 grams. My scale put these at 4.96 grams. Very small and compact.

Way better than expected. The set I got are as good as emax I typically use in this size

Of the five only one works smoothly. 2 died within a few minutes of testing. 2 are very erratic. No movement then sudden jump to catch up and a lot of gear noise.

Great performance

It is a perfect fit for my Mini airplanes and control arms are perfect. Great all around!

Great product