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All Forums >> Radios, Batteries, Clubhouse and more >> RC Radios, Transmitters, Receivers, Servos, gyros >> Radio Manufacturer Direct Support >> Befuddled by Servo Choices
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Befuddled by Servo Choices - 2/19/2007 2:21:26 PM   
ClarkFlyer


 

Posts: 227
Joined: 12/28/2004
From: Battle Ground, WA, USA
Status: offline 		I've only been involved with .40 size planes and I've always used std Futaba servos, 3004s, with no problem. Now I'm putting together a Twist .60, using an OS .91 two stroke and I understand I need beefier servos. I'm looking at all the choices and the wide variety of prices. I want to balance performance and cost and am not sure how to go. The Tower servos are a lot less in money but how are they in quality and life span? Who makes them? Also, I understand that metal gears are stronger but do not last as long. With my Twist, are they a good thing? Will the nylon gears work just as well? I've been told that a digital servo with torque in the 70-80 inch pound range will be ideal. Are there general rules in picking servo power? I'll appreciate any comments.
       Post #: 1

RE: Befuddled by Servo Choices - 2/19/2007 5:28:34 PM   
sslayman



Posts: 80
Joined: 8/16/2004
From: Dublin, VA, USA
Status: offline 		Good luck finding 70 to 80 inch pound servos . I think you meant 70 to 80 oz. inch servos. You might want to look at some 3152's (digital) or maybe even the HS-645MG's (analog). If money is no object then the Futaba 9252's would be a great servo. There are plenty of servo choices out there for what you want to do with them. Just do a search here on RCU for what's available and find something that you're comfortable spending the money on.

Later...

Scott!


_____________________________

Later...

(in reply to ClarkFlyer)
       Post #: 2

RE: Befuddled by Servo Choices - 2/20/2007 1:52:19 AM   
P-40 DRIVER



Posts: 893
Joined: 4/20/2005
From: Cedar Park, TX, USA
Status: offline 		The standard upgrade these day's would be to a Hitec 645 or digital 5645. Best price I have seen would be through Troy Built Models. Check the sight out, It has alot good info. These are very solid metal gear servo's that have plenty of torque but are still reasonably priced.

_____________________________

RC budget, $10 per week, time spent building and flying, priceless.

(in reply to sslayman)
       Post #: 3

RE: Befuddled by Servo Choices - 2/20/2007 6:02:04 AM   
alan0899


 

Posts: 2023
Joined: 4/17/2006
From: Cundletown, NSW, AUSTRALIA
Status: offline 		G'day Mate,
Unless you are going to fly 3D, those standard servos will be fine, it's only a 90FS, I use 4.8 Kilo servos on my 160 size planes, except for the rudder, & have no problems.

_____________________________

Good Flyin Mate. Keep Thyne Airspeed up, lest the ground arise & smite thee, Allan.

(in reply to ClarkFlyer)
       Post #: 4

RE: Befuddled by Servo Choices - 2/20/2007 6:03:05 PM   
carrellh



Posts: 3546
Joined: 3/30/2003
From: Garland, TX, USA
Status: offline
quote:

ORIGINAL: ClarkFlyer
I've only been involved with .40 size planes and I've always used std Futaba servos, 3004s, with no problem. Now I'm putting together a Twist .60, using an OS .91 two stroke and I understand I need beefier servos. I'm looking at all the choices and the wide variety of prices. I want to balance performance and cost and am not sure how to go. The Tower servos are a lot less in money but how are they in quality and life span? Who makes them? Also, I understand that metal gears are stronger but do not last as long. With my Twist, are they a good thing? Will the nylon gears work just as well? I've been told that a digital servo with torque in the 70-80 inch pound range will be ideal. Are there general rules in picking servo power? I'll appreciate any comments.


The "recommended" servos (page 3 of the manual) are JR537 or equivalent. These are standard ball bearing servos with a 40 ounce inch rating.

_____________________________

Regards,
Carrell

(in reply to ClarkFlyer)
       Post #: 5

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