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Got a scale hydro I'm working on and need to get a rudder servo, but I do not remeber how much torque is needed for a rudder on an 1/8 th scale?
How much Torque for rudder servo on 1/8th scale
- Thread starter bzubee
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Bill,
Futaba S3305 works great for me.
Savox 0230MG also.
Right around to just over 100oz is enough
Futaba S3305 works great for me.
Savox 0230MG also.
Right around to just over 100oz is enough
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Thanks That saved me from wasting a high torque digital servo where I didn't need to use one.
Hydro Junkie
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What I've found is it really depends on your linkage and rudder set up. My 2000 Elam won't turn with an S3305 due to the drag in the set up. I was forced to upgrade to an S9156 with roughly three times the torque to get my boat to turn reliably. Now without seeing the setup in my boat, you may question this. The boat was built with a molded aluminum arm that slides on nylon inserts, installed in the left engine bay wall and airtrap and just forward of the strut, with the pushrod from the servo running through the engine bay and the rudder bracket being offset way out against the inside of the left shoe with the pushrod to the rudder arm just inboard of that. This arrangement has a lot of drag and weight in the back of the boat so more "grunt" is needed. Now, if you're using a straight pushrod between the servo to the rudder arm, an S3305 should work well
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Samuel Hagan JR
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I used a non digital servo and had severe steering issues.
I switched to a digital high torque servo and problem solved. I would suggest as much as you can. A little over kill won't hurt.
I switched to a digital high torque servo and problem solved. I would suggest as much as you can. A little over kill won't hurt.
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Going with a HiTech 645MG that is about what it had in it. I found out it is a Muck version and was originally built by John Borden. It's pretty light weight compared to my old Dumas Circus scale also found it was powered by a MAC. Now a Picco blue head will be the engine.
Brian Schymik
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yep good choice
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Need torque to keep rudder straight. Savox 0231 or 1210. Both are waterproof. 0231 40.00, 1210 82.00
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