jklong03
Squadron leader
Utah, USA (Yes, it is a state!)
Posts: 226
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Post by jklong03 on Jun 25, 2013 14:17:34 GMT 1
As I rebuild by beloved Anne (SuperCub LP) with a new brushless setup and ailerons and a new spectrum RX, will I notice a change from replacing the stock HZ servos for the rudder and elevator with these : Power-Up-17G servos which I intend to use for my ailerons. I'm just guess almost any aftermarket servo will be "smother" than the stock HZ ones? |
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Post by flydiver on Jun 25, 2013 16:28:41 GMT 1
For this application I doubt you'll notice any difference.
It's very very hard to get viable informative reviews on servos and ESC. For most folks they are binary > work or not work. After that it's whether they still work after a crash. Long term metal gear servos do wear more than plastic and may develop slop. Doesn't seem right but the plastic ones are 'smoother' and sort of self-lubricating (they are all lubed) so they last longer if they don't break.
Jitter is a different issue indicating a poor 'pot' (potentiometer). Some brands and models seem more prone to that, but getting reliable feedback about it is very difficult since most of what you hear is the people with problems.
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jklong03
Squadron leader
Utah, USA (Yes, it is a state!)
Posts: 226
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Post by jklong03 on Jun 25, 2013 19:55:20 GMT 1
Thanks Fly, I'll just leave those two alone and save myself the money then, but hey, gotta give me credit for a reasonable question, huh?
jk
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Post by flydiver on Jun 25, 2013 20:22:57 GMT 1
It was a reasonable question. A hidden issue is servo power consumption, also almost impossible to get good data on. This becomes important with Spektrum once you get up to 3S and 4 servos. Read this over and follow the servo links. It is a complicated issue but one that you need to know or you'll pay the price with an airplane, not infrequently your very first fully modded Cub. supercubclub.proboards.com/thread/1858 |
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jklong03
Squadron leader
Utah, USA (Yes, it is a state!)
Posts: 226
|
Post by jklong03 on Jun 25, 2013 20:57:14 GMT 1
It was a reasonable question. A hidden issue is servo power consumption, also almost impossible to get good data on. This becomes important with Spektrum once you get up to 3S and 4 servos. Read this over and follow the servo links. It is a complicated issue but one that you need to know or you'll pay the price with an airplane, not infrequently your very first fully modded Cub. supercubclub.proboards.com/thread/1858I noticed that most of that thread was from about 4 years ago. I'll admit to only doing a cursory reading of the thread, but don't the more modern Brushless ESCs with switched mode BECs avoid this problem? This is the BEC I'm looking at getting with my 480 Outrunner motor, (yes, it's a little bit of overkill, but hopefully will be useful in future projects and its not that much more expensive than a 30 Amp model. 45 Amp Brushless ESC |
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Post by flydiver on Jun 25, 2013 21:40:30 GMT 1
Yes, robust SBEC help to avoid the brown out issue from the BEC perspective. Not nearly as much was known or understood about Spektrum limitations. People thought Spektrum cured everything.
A very common upgrade years ago with the NiMh Cub was 4 x 9g HXT servos (good servos, cheap, but high draw) and a lousy GWS brushed ESC. Cubs simply fell out of the sky to the dismay of very puzzled pilots.
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