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Old 09-28-2004, 11:06 AM   #1
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Default 12th scale servo?

I was Just wondering what servo should use on a 12th scale?
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Old 09-28-2004, 11:08 AM   #2
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I use and like the JR 3550... There is a good digital Hi-Tec that people like, but I forget the model...
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Old 09-28-2004, 11:20 AM   #3
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do you know the speed, tork, and prices for both of them?
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Old 09-28-2004, 11:30 AM   #4
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Here is the JR one
http://www.horizonhobby.com/Shop/ByC...odID=JRPSZ3550
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Old 09-28-2004, 11:55 AM   #5
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I think this is the Hitec one you were thinking of : HS-5245MG Digital Mini servo.

http://www.servocity.com/html/hs-524...ital_mini.html

.12 at 6v... but in a 1/12th you only have 4.8v so .15sec and 61oz of torque.
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Old 09-28-2004, 12:14 PM   #6
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Hitec also makes a non-digital ball bearing mini - inexpensive but good in a 1/12 - the number is HS225BB, I think they also make a metal gear version, too.
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Old 09-28-2004, 12:28 PM   #7
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Thank you everybody! You all helped alot
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Old 09-28-2004, 12:29 PM   #8
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Quote:
Originally posted by slots
Hitec also makes a non-digital ball bearing mini - inexpensive but good in a 1/12 - the number is HS225BB, I think they also make a metal gear version, too.
I have the metal gear version, and it doesn't center well.. if you go hitec, get the digital version
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Old 09-28-2004, 12:41 PM   #9
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I would use either the KO servo (947 or 949 I believe) or the futabal (9602 is analog, 9650 is digital)
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Old 09-28-2004, 12:54 PM   #10
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KO PDS 947 or PDS 949, They are bar none tthe BEST servos available.
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Old 09-28-2004, 12:58 PM   #11
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I will be getting one of those.. I have a KO radio now and want a KO servo...
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Old 09-28-2004, 01:23 PM   #12
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Quote:
Originally posted by Scott Fisher
I would use either the KO servo (947 or 949 I believe) or the futabal (9602 is analog, 9650 is digital)
I have heard that is a really good servo
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Old 09-28-2004, 01:34 PM   #13
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Quote:
Originally posted by Tony Szep
I have heard that is a really good servo
Tony... pick up a Ko Propo PDS949 ICS (programmable). you cant go wrong dude!

You can get more information here: http://www.kopropo.com/servos.htm

from what ive seen in the pits.. its the most popular servo for the pan/direct drive and 12th scale guys here at socal raceway.
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Old 09-28-2004, 01:38 PM   #14
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Multiplex also has a good digital mini servo
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Old 09-28-2004, 01:41 PM   #15
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So if a KO PDS-947 has .09 transit and 38.8 oz/in of torque at 6.0v... what do you think it will have at 4.8v.

I have an airtronics 94145 that has .07 transit and 33 oz/in of torque at 6.0v but at 4.8v it can't hold center very well in my 1/12th scale. I can only imagine how weak it is when I'm accelerating and pulling a lot of amps and dropping the available voltage well below 4.8v.

I know I could solve that problem by using a receiver pack but I think I'd rather just get a Futaba 9650 that is rated for .14 transit and 50oz/in of torque at 4.8v not 6.0. Heck... at 6.0v it's rated at .11 transit and 62.5 oz/in of torque.

For easy reference here are all the 6.0v numbers since 6.0v is what I could find for all servos mentioned:

Futaba
9602
.09sec and 37oz/in

9650 digital
.11sec and 62.5oz/in

Airtronics
94145
.07sec and 33oz/in

Hitec
HS-5245MG digital
.12sec and 76oz/in

KO
PDS-947 OR PDS-949 both digital
.09sec and 38.8oz/in


hope that helps.
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