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Micro Servo for .25 Size Plane - 1/8/2012 2:26 PM   
leeosenton


 

Posts: 7
Score: 100
Joined: 10/29/2011
Last Login: 3/16/2012
From: Suffolk, VA, USA
Status: offline 		I am building a .25 size stik and want to put a small servo in each wing for flaperons. The plane has a 44" span and will be powered by a O.S. 25FX. I was planning to use Futaba S3114 servos but noticed they are not recommended for fuel powered airplanes. The standard S3004 servos produce 44 oz/in of torque and the S3114 servos produce 21 oz/in of torque. Based on the output torque alone, these look like a viable option but I am concerned about Futaba's recommendation. Looking for advice, this is only my second plane.


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RE: Micro Servo for .25 Size Plane - 1/8/2012 5:18 PM   
blvdbuzzard



Posts: 2934
Score: 123
Joined: 6/16/2002
Last Login: 5/11/2013
From: high deserts, CA, USA
Status: offline 		I would not go micro sized but mini sized servos. Something in the 16 to 20 gram range or so.

http://www.hobbypartz.com/33p-solarservo-d655.html

I think these are HD servos, I have (4) that have the same spec's, same look from Hobby King and they are a really good servo.

http://www.hobbypartz.com/raiden-digital-servos-dma-039.html

http://www.hobbyking.com/hobbyking/store/__6341__Digital_metal_gear_servo_16g_4_6kg_16sec.html

http://www.hobbyking.com/hobbyking/store/__6340__Digital_Metal_gear_servo_16g_3_9kg_13sec.html

I have 20 of these and they work great. Not sure I would use them on a 25 sized stik, maybe a 25 sized Cub.

http://www.hobbypartz.com/raiden-digital-servos-dma-039.html

Here is an online conversion site to figure out the torque ratings
http://www.onlineconversion.com/torque.htm

Buzz.

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RE: Micro Servo for .25 Size Plane - 1/8/2012 6:47 PM   
BMatthews



Posts: 11655
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Last Login: 5/14/2013
From: Chilliwack, BC, CANADA
Status: offline 		For using one in each wing those 21 in-oz Futaba servos would be fine. They may not like vibration but being out on the wing and away from the engine they'll be fine.

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RE: Micro Servo for .25 Size Plane - 1/10/2012 12:56 AM   
leeosenton


 

Posts: 7
Score: 100
Joined: 10/29/2011
Last Login: 3/16/2012
From: Suffolk, VA, USA
Status: offline 		Thanks, guys. I was confident in my choice until I actually saw the servos. They are really small; I can easily see why Futaba does not recommend use in nitro powered models. I may go forward with them or select another brand if I can find a suitable mini-servo.

Lee


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RE: Micro Servo for .25 Size Plane - 1/13/2012 4:38 AM   
Terry Bolin


 

Posts: 257
Score: 106
Joined: 10/25/2008
Last Login: 2/12/2013
From: NEOSHO, MO, USA
Status: offline 		3004 or 3003 is what I use as a common servo for most of my planes...

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