Thread Tools
Jul 27, 2012, 09:15 AM
Registered User
A.B.'s Avatar
Discussion

IOM rudder servo


So what is the ideal torque and speed for and IOM rudder servo. Type suggestions welcomed!!

I am in the process of planning out my next build and this time I would like to do it as right as possible, and still on a tight budget?

Andrew
Sign up now
to remove ads between posts
Jul 27, 2012, 09:29 AM
Registered User
Andrew,
I have a futaba 3004 servo in one of my IOM's for rudder servo. Thinking about switching to a to an S3050 rudder servo if I change servos. Ryan
Jul 27, 2012, 09:34 AM
Registered User

iom rudder servo


go with the S3003 futaba servo for less than $10ea. you can afford to get an extra or two.
Jul 27, 2012, 09:52 AM
Registered User
8387mike's Avatar
http://www.hobbyking.com/hobbyking/s...kg_0_17s_.html

Great cheap servo no fancy stuff and reliable-Last boat one of these, my current boat 2 hitec's
Jul 28, 2012, 07:10 PM
Registered User
Quote:
Originally Posted by sullyelvis
go with the S3003 futaba servo for less than $10ea. you can afford to get an extra or two.
If you buy one good one, you never need to buy two.
I can't speak to the Futaba servo, as all of my boats use Hitec.. so I'm not saying that the S3003 is junk...
Just saying you never need to overbuy if you buy the right thing.


I'm using the Hitec HS-311 in all of my boats (2x EC-12, 3xMarbleheads). It's a good standard servo. $7.99
http://www.servocity.com/html/hs-311_standard.html
Last edited by breakwater; Jul 28, 2012 at 07:17 PM.
Jul 28, 2012, 08:25 PM
Registered User
A.B.'s Avatar
I am using the 311 right now in my IOM, What i was really wondering is if i need to get a faster servo or highter torque?
Jul 28, 2012, 09:18 PM
Registered User
Nope. IOM rudders are pretty easy to turn. Good linkage will help a lot. Ryan
Jul 28, 2012, 09:23 PM
Registered User
Well, The IOM is smaller than the Marblehead, and much smaller than the EC-12.
So, I'd say without a doubt that you do not need higher torque than the HS-311. (HS-311 is 51oz/in) If anything that means you can get away with less.

In terms of speed, that's a little more of an opininion question.
Do you want your rudder to turn faster?

The HS-311 is plenty fast enough for me in both the M and EC-12 applications.




If money is not an object, I'd say go with this servo.. The HS-5086WP.
It's Micro Sized, It's light, it's waterproof, it's digital.

But, It's 50 Bucks.
http://www.servocity.com/html/hs-5086wp_servo.html
Jul 28, 2012, 09:31 PM
Registered User
Quote:
Originally Posted by A.B.
I am using the 311 right now in my IOM, What i was really wondering is if i need to get a faster servo or highter torque?
Your question suggests you may not be happy with the 311 servo in your current boat perhaps?

IMHO you do not necessarily need "fast" for rudder servo as good rudder use should be primarily "smooth" - only making minor corrections to avoid the "braking" effect of the rudder thus keeping your speed and momentum up.

Regarding "torque" - if you are concerned that your rudder servo may be stalling under high load consider the following:
a) get a stronger servo
b) are you using push/pull linkage? Single link may be flexing when pushing, this is eliminated with push/pull
c) deliver more torque (but less travel) to the rudder by using the appropriate holes in servo arm and rudder horn to gain a mechanical advantage
d) As mentioned elsewhere, watch for binding or rubbing linkages, rubber boots that do not compress easily when cold, tight/binding rudder shaft - things like that...

HTH
Jul 29, 2012, 02:17 AM
Registered User
ToniGe23's Avatar
Buy a decent servo that will centre spot on every time most of the more expensive servos use a water/dust proof seal between the cases which is what I use.
Jul 29, 2012, 10:30 AM
Registered User
A.B.'s Avatar
Thank you for all the advice, I do not have issues with the 311, i just thought some of the better boats were using a higher grade of servo. So as I plan my next build i was just trying to work out the servo's i need to purchase.

At my first ever IOM regatta a couple of weeks ago in Hood River Oregon it looked to me that some of the top boats were turning faster (with out braking) than me, I guess this could also be the operator or hull/fin shapes?

Andrew


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Sold Cool fun RC Sailboat for sail $650.00 Rssailor Boats (FS/W) 4 Jul 23, 2012 09:57 AM
Sold NEW align ds620 digital coreless heli rudder servo -- low price aquaanox Aircraft - General - Radio Equipment (FS/W) 1 Jul 08, 2012 11:17 PM
Help! rudder/ch4 going crazy chattering, even killed one servo topgun22 Beginner Training Area (Aircraft-Electric) 13 Mar 12, 2012 12:08 PM
Help! Rudder/stick movement and servo travel 1Man1Mountain Beginner Training Area (Heli-Electric) 8 Mar 09, 2012 07:07 PM
Robbe Windstar (IOM) with a sail arm servo? rchadd Sailboats 3 Jul 21, 2005 08:11 PM