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Old Jul 05, 2011, 02:14 AM
Houng-wen Lin
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Shijr, Taiwan. DungGwan, China. City of Industry, California.
Joined Sep 2001
19,445 Posts
Discussion
What's servos perfect match for Large Electric Helis?

I like to hear from your experience about new age's Large Electric Helis.

How strong of the torque?

How fast of the servo rotate speed?

Less current when heavy loaded. Longer life span...

I know, you will expect less backlash, nicely gears fit....

Not too costy!

Boeing supply the Dream Liner. But we like to supply dream servos!



S03N3 Strong Digital MG 2BB servo had test datas just measured as below:

4.8V 0.188sec 29.0kg-cm 4000mA

6.0V 0.160sec 35.0kg-cm 4700mA

7.4V 0.134sec 42.0kg-cm 5300mA

8.4V 0.126sec 44.0kg-cm 5800mA

Guess this is the best brushed core motor standard size servo among all!

Like her sisters, she come with full CNC metal case.

Test datas recently Up grade of GWS S03N3 servos: ( measured at late June. 2011 )

●STD
0.131Sec/25.0Kg-cm@4.8V、
0.110Sec/32.5Kg-cm@6.0V、
0.100sec/37.5Kg-cm@7.4V、
0.094sec/40.0Kg-cm@8.4V

● FAST
0.115Sec/21.5Kg-cm@4.8V、
0.094Sec/26.5Kg-cm@6.0V、
0.078Sec/30.0Kg-cm@7.4V、
0.070Sec/35.0Kg-cm@8.4V

●XTRA FAST
0.094Sec/17.5Kg-cm@4.8V、
0.080Sec/22.0Jg-cm@6.0V、
0.067Sec/26.5Kg-cm@7.4V、
0.063Sec/28.5Kg-cm@8.4V
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Old Jul 05, 2011, 02:17 AM
Houng-wen Lin
GWS4CEO's Avatar
Shijr, Taiwan. DungGwan, China. City of Industry, California.
Joined Sep 2001
19,445 Posts
However, if you don't need too much torque, rather to have faster speed, then the GWS S03Q3 will perform faster:

●Q3 STRONG
0.075Sec/11.6Kg-cm@4.8V、
0.064Sec/14.0Kg-cm@6.0V、
0.054sec/16.8Kg-cm@7.4V、
0.050sec/17.6Kg-cm@8.4V

●Q3 STD
0.064Sec/ 9.0Kg-cm@4.8V、
0.055Sec/10.9Kg-cm@6.0V、
0.046Sec/13.0Kg-cm@7.4V、
0.043Sec/13.6Kg-cm@8.4V

●Q3 FAST
0.059Sec/ 7.3Kg-cm@4.8V、
0.050Sec/ 8.8Kg-cm@6.0V、
0.042Sec/10.5Kg-cm@7.4V、
0.039Sec/11.0Kg-cm@8.4V

●Q3 XTRA FAST
0.047Sec/ 5.0Kg-cm@4.8V、
0.041Sec/ 6.5Kg-cm@6.0V、
0.038Sec/ 8.0Kg-cm@7.4V、
0.036Sec/ 9.0Kg-cm@8.4V

How you like a standard size servos to be likewise?

Let's make it to be realized!
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Old Jul 05, 2011, 03:34 AM
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Denver, CO
Joined Dec 2005
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I like my servo's to last a long time, be reliable, not draw rediculous amounts of current, and have good bearing support of the output shaft.
I like ratings that tell if its holding torque, or dynamic. And speed ratings that tell the degree's.
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Old Jul 05, 2011, 08:03 AM
A man with too many toys
United States
Joined Feb 2001
17,374 Posts
For helicopters you want efficient servos with brushless motors. I use mainly Futaba BLS servos myself.

With the increased use of all the flybarless controllers you don’t want to cut corners on cheap servos. These days it’s not just about speed and torque but more about response time and ability to take very high input frame rates. Some of the buys with the CGY750 flybarless controller have experienced overheating and failures when using cheap servos. That gyro would be a good test for any new servo on the market.


.
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Old Jul 05, 2011, 08:08 AM
A man with too many toys
United States
Joined Feb 2001
17,374 Posts
Quote:
Originally Posted by GWS4CEO View Post
I like to hear from your experience about new age's Large Electric Helis.

How strong of the torque?

How fast of the servo rotate speed?

Less current when heavy loaded. Longer life span...

I know, you will expect less backlash, nicely gears fit....

Not too costy!

Boeing supply the Dream Liner. But we like to supply dream servos!

S03N3 Strong Digital MG 2BB servo had test datas just measured as below:

4.8V 0.188sec 29.0kg-cm 4000mA

6.0V 0.160sec 35.0kg-cm 4700mA

7.4V 0.134sec 42.0kg-cm 5300mA

8.4V 0.126sec 44.0kg-cm 5800mA

Guess this is the best brushed core motor standard size servo among all!

Like her sisters, she come with full CNC metal case.

Test datas recently Up grade of GWS S03N3 servos: ( measured at late June. 2011 )

●STD
0.131Sec/25.0Kg-cm@4.8V、
0.110Sec/32.5Kg-cm@6.0V、
0.100sec/37.5Kg-cm@7.4V、
0.094sec/40.0Kg-cm@8.4V

● FAST
0.115Sec/21.5Kg-cm@4.8V、
0.094Sec/26.5Kg-cm@6.0V、
0.078Sec/30.0Kg-cm@7.4V、
0.070Sec/35.0Kg-cm@8.4V

●XTRA FAST
0.094Sec/17.5Kg-cm@4.8V、
0.080Sec/22.0Jg-cm@6.0V、
0.067Sec/26.5Kg-cm@7.4V、
0.063Sec/28.5Kg-cm@8.4V


What is the size and weight? Will thy fit in my Trex 700?


How about a 760us/550Hz high speed rudder servo?


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Old Jul 05, 2011, 01:19 PM
Houng-wen Lin
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Shijr, Taiwan. DungGwan, China. City of Industry, California.
Joined Sep 2001
19,445 Posts
Quote:
Originally Posted by Roto Rob View Post
I like my servo's to last a long time, be reliable, not draw rediculous amounts of current, and have good bearing support of the output shaft.
I like ratings that tell if its holding torque, or dynamic. And speed ratings that tell the degree's.
The speed that we talked about is identical same as FUTABA for 60 degree. Stall torque will bring the MAX current similar to:



S03N3 Strong Digital MG 2BB servo had test datas just measured as below:

4.8V 0.188sec 29.0kg-cm 4000mA

6.0V 0.160sec 35.0kg-cm 4700mA

7.4V 0.134sec 42.0kg-cm 5300mA

8.4V 0.126sec 44.0kg-cm 5800mA

Guess this is the best brushed core motor standard size servo among all, yet, they run very smoothly, current rating are rather too small: )!

Like her sisters, she come with full CNC metal case.

Where you can get it? No where at this moment.

How much of this servos? All metal CNC cases version: Digital $100/ea; Linear $95

But you can buy from www.caliberhobby.com prebooking your orders if you are living in USA. or mail: service@gwsus.com

From GWS China: china@gws.com.tw if you living in China, Hong Kong and Macao.

Who living in Taiwan or other countries arround the word: service@gws.com.tw
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Old Jul 05, 2011, 11:13 PM
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Joined Apr 2008
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Have these servos been tested on 6.4v or higher with Futaba CGY750 flybarless system to see how hot the servo get after 5 or 6 minutes of 3D flying?
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Old Jul 06, 2011, 05:00 AM
A man with too many toys
United States
Joined Feb 2001
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Quote:
Originally Posted by chopper62 View Post
Have these servos been tested on 6.4v or higher with Futaba CGY750 flybarless system to see how hot the servo get after 5 or 6 minutes of 3D flying?
LOL Yes those CGYs are notorious for smoking servos that are not specifically designed for high update rate and constant motion. Even the standard Futaba servos will smoke. You have to use Futaba brushless motor servos with electronics that are designed for use with flybarless controllers. A GWS would probably smoke very quickly LOL.


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Old Jul 06, 2011, 06:30 AM
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United States
Joined May 2000
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How many have you smoked rc man?, and what servos. Flying CGY750 on raptor G4/E720 with 9255's and I have 102 flights on the machine now. Temps near 100 on servos after flight. Ambient in the 90's here. rx/servo power regulated to 6V from a 3-cell lipo. Step down to 5V for tail servo. My flights are "smooth 3D" not smack-style, but I fly 10 minute flights(lower headspeed than most, 1800 currently, and I manage collective fairly well, hence the long flights) and back-to-back flights. The first 50~75 flights were with 9155's (92's are lower deadband heli servos where the 91's were airplane servos I simply had on hand). By the way, the 9255's aren't even recommended for 6V, only 4.8/5, so if the 750 was a problem it would show up with them. They are very low deadband so they work constantly, and My heli setup allows for very high gains so they work even harder. Gains are 122 and 135 for cyclics (you can go into the 750 and crank them above 100 to the limit of 150)
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Old Jul 06, 2011, 10:10 AM
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Joined Apr 2008
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Quote:
Originally Posted by GWRIGHT View Post
How many have you smoked rc man?, and what servos. Flying CGY750 on raptor G4/E720 with 9255's and I have 102 flights on the machine now. Temps near 100 on servos after flight. Ambient in the 90's here. rx/servo power regulated to 6V from a 3-cell lipo. Step down to 5V for tail servo. My flights are "smooth 3D" not smack-style, but I fly 10 minute flights(lower headspeed than most, 1800 currently, and I manage collective fairly well, hence the long flights) and back-to-back flights. The first 50~75 flights were with 9155's (92's are lower deadband heli servos where the 91's were airplane servos I simply had on hand). By the way, the 9255's aren't even recommended for 6V, only 4.8/5, so if the 750 was a problem it would show up with them. They are very low deadband so they work constantly, and My heli setup allows for very high gains so they work even harder. Gains are 122 and 135 for cyclics (you can go into the 750 and crank them above 100 to the limit of 150)
There is a long post over at RunRyder regarding hot servo (130* +) when the servos are on higher voltage with the CGY750.
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Old Jul 06, 2011, 10:14 AM
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I'm very aware of that thread , have even posted in it with my temps, as have others. The person mentioned "too hot to touch or he'd get burned", and apparently tried to create mass-hysteria,.. then when his real numbers were finally posted,.. they are lower than others. There are also some on there running higher voltage to the servos than manuf. recommendations. i think you have to take all that into account before making a false accusation that a product is "notorious" for doing something wrong.
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Old Jul 10, 2011, 11:13 AM
Houng-wen Lin
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Shijr, Taiwan. DungGwan, China. City of Industry, California.
Joined Sep 2001
19,445 Posts
Quote:
Originally Posted by chopper62 View Post
Have these servos been tested on 6.4v or higher with Futaba CGY750 flybarless system to see how hot the servo get after 5 or 6 minutes of 3D flying?
I will get this gyro to link with our servos to test as your suggestion.


Thank you for the advise.
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Old Jul 10, 2011, 11:21 AM
Houng-wen Lin
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Shijr, Taiwan. DungGwan, China. City of Industry, California.
Joined Sep 2001
19,445 Posts
A GWS would probably smoke very quickly LOL.???

Quote:
Originally Posted by RC Man View Post
LOL Yes those CGYs are notorious for smoking servos that are not specifically designed for high update rate and constant motion. Even the standard Futaba servos will smoke. You have to use Futaba brushless motor servos with electronics that are designed for use with flybarless controllers. A GWS would probably smoke very quickly LOL.


S03N3 Strong Digital MG 2BB servo had test datas just measured as below:

4.8V 0.188sec 29.0kg-cm 4000mA-Stall; 450mA-No load

6.0V 0.160sec 35.0kg-cm 4700mA-Stall; 580mA-No load

7.4V 0.134sec 42.0kg-cm 5300mA-Stall; 650mA-No load

8.4V 0.126sec 44.0kg-cm 5800mA-Stall; 790mA-No load

Hope this make things more clearly!
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Old Jul 10, 2011, 11:36 AM
Houng-wen Lin
GWS4CEO's Avatar
Shijr, Taiwan. DungGwan, China. City of Industry, California.
Joined Sep 2001
19,445 Posts
Quote:
Originally Posted by Roto Rob View Post
I like my servo's to last a long time, be reliable, not draw rediculous amounts of current, and have good bearing support of the output shaft.
I like ratings that tell if its holding torque, or dynamic. And speed ratings that tell the degree's.
Yes! I understand that you need to buy your servos from a long established company?

May be that you are not familiar with me? RC is full of my life!

I was selling RC products since 1971, established an after service station in Taiwan for Karft System since 1974 to back up Taiwan RC flyers.

Then, I started to produce servo and radio system since 1981.

In RC industry, I am the "SERVOMAN". I am not the one of those China copy cats which they had copied a lot of my invention in this days!

I had created GWS NARO 9g servo, first production in 1996 Spring. Although there are so many copy clones now. Yet, many other servo concepts were created by me!

However, I keep listenning to RC modelers' opinions. Because of I am just another RC flyer too! I care what your feeling about my servos.

But I wasn't flying too perfect like my servos had done!


When I show my new servos to JR's president, sales manager, and export manager during 2011 Beijing RC Model show ( April 30th~ May 3rd ) about many GWS new servos, I can see what their face were talking!

GWS is going to give this kind of servos even apporch to military standard applications. GWS did a lot of military UAV projects in the past years.
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Old Jul 10, 2011, 11:48 AM
Houng-wen Lin
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Shijr, Taiwan. DungGwan, China. City of Industry, California.
Joined Sep 2001
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There also some other standard size servos GWS will provide:

New test result of S03N2 servos at early July 2011

S03N2 D  
mA t/60 degree Kg-cm
1600mA 0.126sec 8.5Kg-cm
1700mA 0.104sec 11.0Kg-cm
1900mA 0.086sec 13.5Kg-cm
2100mA 0.077sec 14.2Kg-cm

S03N2 F D  
1600mA 0.098sec 7.5Kg-cm
1700mA 0.084sec 9.5Kg-cm
1900mA 0.071sec 11.5Kg-cm
2100mA 0.062sec 12.5Kg-cm          

S03N2 XF D  
1600mA 0.082sec 6.5Kg-cm
170mA0 0.071sec 7.5Kg-cm
1900mA 0.061sec 9.0Kg-cm
2100mA 0.055sec 10.3Kg-cm

This is light weight 29g standard servo

Also a stronger version as well:

S03N2+D  
4.8V 2100mA 0.134sec 12.4Kg-cm
6.0V 2400mA 0.114sec 15.8Kg-cm
7.4V 2800mA 0.102sec 18.2Kg-cm
8.4V 3000mA 0.095sec 19.5Kg-cm

S03N2+F D  
2100 0.110sec 10.3 Kg-cm
2400 0.098sec 12.7Kg-cm
2800 0.081sec 14.6Kg-cm
3000 0.074sec 16.8Kg-cm

S03N2+XF D
2100 0.089sec 8.5Kg-cm
2400 0.078sec 10.5Kg-cm
2800 0.070sec 12.8Kg-cm
3000 0.064sec 14.0Kg-cm

The above current are measured under stall. The current of no load should be about half when compared with GWS S03Q3 servos.
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