What is a real good servo for the throttle? I see guys doing 3D and their engines have very fast throttle response. Which is the one you can recommend? Thanks.

FLAPHappy
You can usually get all the throttle response you need out of even the most basic servo . What really maters is the geometry of the linkage to get the most out of speed and position accuracy. Any servo with more than 50 in oz.of torque will usually surfice. If you have a computer radio with the ability to set a throttle curve and servo speed along with good mechanical geometry can make things easier on you . But the real key to good throttle response is a properly tuned engine . A poor tune and all the throttle servo speed in the world wont save you when the engine stalls.

After seeing and experiencing several in flight throttle servo failures, these days I recommend a throttle servo of the same quality you would consider adequate for any of your flight surfaces. I consider resolution very important on the throttle and you don't get that with a cheap servo. Certainly we expect the servo to be reliable. That said, yes you can get good throttle response with most any servo.

With today's digital servos trying to maintain near perfect centering, I think it's worth mentioning that if your linkage isn't running free (no detectable drag), or your end points (both of them!) aren't set so there's a little extra room on each end, you're going to smoke servos until you get it right.... makes no difference what you paid for it. From what I see here, as well as some of my own experiences (I smoked 2 servos getting one plane right) there's enough trouble here where extra time spent getting the throttle set up just right pays handsomely!

Point being, I think it's as much or more about setup as it is about having the "right" servo. That's my thought anyway. -Al

ahicks, I usually mention the importance of end point adjustments when referring to throttle servos. For some reason, I didn't this time around. I still maintain the throttle servo should be the same quality level as the rest of the servos in the plane. You are 100% correct though, any servo can fail if driven (stalled) against a throttle stop.

I have three JR 3421s that I had for years new, never used, now they are on my two throttle gassers, they are awesome for this application, fast, precise and strong. I will also have to agree with the previous posts that the geometry of the set up is very important to servo longevity, use end points and set up a curve to soften the low end.

I hope this helps.