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HomeAircraftHelicopterRadio - Servo - Gyro - Gov - Batt › Concept 30 tail servo replacement needed to handle torque/heat/Gy401
06-07-2018 03:25 AM  11 days agoPost 1
InvertedDude

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USA

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Any ideas on tail servo replacement. The Futaba 9254 is getting too hot for my comfort. I need a tail servo that will work with GY401 that can handle heat and torque. My 9254 servo is getting around 155F and that is just too hot. I have done everything to smooth the throw/lessen torque. The servo needs to be double the torque the 9254 to keep the temps down.

The concept is smooth and vib free, I have switched to many gyro tapes and fooled around different options. I just need a stronger servo that can handle the 2mm wire drive with little extra torque from the old style design.

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06-07-2018 03:56 AM  11 days agoPost 2
InvertedDude

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USA

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Ds620 servo
I do have this servo....seems to have double the torque and heatsink.

Speed is slower to .09.

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06-07-2018 04:17 AM  11 days agoPost 3
InvertedDude

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USA

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DS620
Performed much better....but Temps at 141F!

Outside Temp 93F

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06-07-2018 05:46 AM  11 days agoPost 4
banshee rider

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Phoenix AZ.

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I would say that either the servo is bad or there is something else going on

That servo may blow out in fast backwards flight because its not very strong but it should not be overheating

I have used them on all kinds/sizes of machines without a heat issue
I think I have one on an old Freya with a CGY750 right now
no heat issues blowout issues yes

ageing is manditory maturity is optional

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06-07-2018 05:58 AM  11 days agoPost 5
InvertedDude

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USA

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banshee rider
In the beginning, I did have some weird harmonic vibes that just rung it doorbell. I was able to fix it but I suspect the frame is crap and spread vibes easily. I am using a good thick foam gyro take and pretty much stopped most of the issues. Kinda suspicious there are some unseen vibes making my tail servo get hot. The other servos including the 9252 on collective remain cool.

This has dogged me since I build this machine and it was built new.

The tail servo wire is from the Raptor 50 and it works great....just tail getting hot. I have tried Gy611/9256 from a good known working and the same issue....it gets hot!

Tried Spartan DS760 with 9254/9256 same issue.

Engine is slick smooth!

I would like to find a way to lower the temp so the tail servo lasts longer.

This is a concept 30, so no 3d or hard FF....just baby smooth easy. This doesn't explain why the tail servo is hot.

I can try a Gy520 with Bls251 to see if brushless runs cooler?

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06-07-2018 02:14 PM  10 days agoPost 6
BeltFedBrowning

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Kansas City

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If you have vibes, the 251 will not run cooler.

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06-07-2018 02:29 PM  10 days agoPost 7
InvertedDude

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USA

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BeltFedBrowning
The concept is very slick and smooth....I wished you were around so you can hear it for me. There is something unseen.

I was considering buying Savox 1290MG since it uses 1520 pulse/333 hertz with an operating range of 20C to 60C (140F).

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06-07-2018 02:39 PM  10 days agoPost 8
InvertedDude

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USA

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RR member expressed
That he used Savox 1290MG as a tail servo on a gasser with over 120 flights.

Gassers kill servos, but if this one can tolerate the abuse. I just placed one on order.

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06-07-2018 08:40 PM  10 days agoPost 9
JuanRodriguez

rrProfessor

The Villages, Florida

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InvertedDude
RR member expressed
That he used Savox 1290MG as a tail servo on a gasser with over 120 flights.

Gassers kill servos, but if this one can tolerate the abuse. I just placed one on order.
I responded to your PM..... sorry, no experience with Savox.

But I can tell you that back in the day when the Fut 401 was popular, MANY MANY ran the Fut 9253/9254 servo without ANY overheating issues....

So, either there is something funky going on with your setup OR you wound up with a bad servo or a servo that went bad......

Edit: In re-reading this thread, I see that Banshee came to the same conclusion that I've just posted...... So, I would start looking for whatever issues are causing your over heating problem......and / or replace that servo with another 9253/54.....

Been there, done that and old enough to know better.....

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HomeAircraftHelicopterRadio - Servo - Gyro - Gov - Batt › Concept 30 tail servo replacement needed to handle torque/heat/Gy401
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