DS8911 Servo
 

Guys

I've been doing my normal running in process on a set of DS8911 25kg servos.
This is the same servo as the 8711 but with the heat sink case.
The interesting thing is that the two servos running side by side the 8711 you don't feel the heat through the plastic case. The aluminium case version really shifts the heat into the case.

Long term it will be interesting to see the long term effect.


Dave W

RE: DS8911 Servo
 

A metal case ? Interesting.

For those people who hard-mount their servos rather than using the rubber grommets etc - I wonder whether the heat cycles can contribute enough repeated expansion and contraction to effectively work the screws free over time ? Might be worth a little more periodic maintenace in those installations, just to be sure.

Gordon

RE: DS8911 Servo
 

Hey, I'm looking at a brand-new 8711 that I got a couple of weeks ago and it has the red aluminum case the same as the one you have that is labled an 8911. What gives? Are your numbers over there different than ours?

Bob

RE: DS8911 Servo
 

I guess so!
We have 8711/8715 plastic and 8911/8915 aluminium centre.

Gordon-only the centre is Alu

Dave

RE: DS8911 Servo
 

I bet it is a voltage hog. Any word on that?

RE: DS8911 Servo
 

Up to 4 amps at peak!

RE: DS8911 Servo
 

I only have two flights on a F-15 I did with two 8711's (8911's for the Euro folks) on the stabilators. I didn't notice any significant amount of increase load on the flight pack when I recharged it. I pushed it pretty hard on the second flight too. I don't think that the current draw is going to be significantly higher if the load on the servo isn't higher...

Bob

RE: DS8911 Servo
 

Guys

It's only going to be high if you are working it hard...as with most Digitals.
The way I see it is these are more aimed to large 3-D aeroplanes or 90 helicopters than jets where the servos do get worked quite as much.

Dave w