Rudder Servo for twin 90 outrigger

[Shane Bastick]

Hi guys,

I have a futaba S9157 standard size, super torque digital servo, it produces over 425oz of torque (31kg), with metal gears, bearings etc, is this ok for a twin 90 rigger

 

[aaron alberico]

Shane,

It will be more then enough,

I have one with similar power in my twin,

Never had an issue.

Regards Aaron

 

[Shane Bastick]

thanks Aaron,

I only ask because, some guys recommend a 1/4 scale servo, even though most 1/4 scale servos (with the exception of a few hitec models) dont produce 31+ kg of torque anyway, most 1/4 scales are much less than that in the 20-25kg range.

At least the futaba 9157 is only standard size, just wanted to make sure I have things right

 

[Tom Foley]

Part of the reason some suggest a larger servo is the ability to withstand a wideopen blowover and entering the water stern first . If you actually race , this will happen eventually !! Good luck !

 

[jayt]

The larger gears and bearings in the 1/4 scale servos will take much more of a beating and wear less than the metal gears in a standard size unit. Other club members have stripped the metal gears in standard servos on occasion, that's why Futaba and HiTec offer replacement gears. If you didn't have the S9157 already I'd suggest a 1/4 scale servo, they are usually a bit cheaper too. The S9156 has 380 oz-in on 6 volts (more than enough) and costs just $120 at servo city versus $140 for the S9157.

.

 

[BigChuck]

At the end of the date day what ANYONE suggest is just that...........As the owner and the person spending the money, purchase what you want as You are the one driving. Short of that do the research and buy what suits your pocket in cost.

 

[Shane Bastick]

Thanks for all the advice, I dont race, but as aIways I want things to last , i like to buy the best once, As Aaron said, 425oz with the 9157 is more than enough in this instance, Iv'e got several 1/4 scale servos from hitec, multiplex and futaba already, but their specs just dont come any where near the top end futaba's

 

[dwilfong]

JR DS8711 403oz water prof. had this servo for 4 years under water many times and never losses a beat.

Also it centers the same every time. rock solid.

David

 

[Don Ferrette]

The larger gears and bearings in the 1/4 scale servos will take much more of a beating and wear less than the metal gears in a standard size unit. Other club members have stripped the metal gears in standard servos on occasion, that's why Futaba and HiTec offer replacement gears. If you didn't have the S9157 already I'd suggest a 1/4 scale servo, they are usually a bit cheaper too. The S9156 has 380 oz-in on 6 volts (more than enough) and costs just $120 at servo city versus $140 for the S9157.

The Futaba 9156 is not a 1/4 scale servo, the info listed on Servo City is incorrect. A typical quarter scale has a case length of approx. 59-60mm, a standard is approx. 40-41mm, the 9156 is a 40mm case. Unfortunately for reasons I don't know, Futaba has chosen to discontinue the large 1/4 scale servos. What has been said by others regarding the strength of the bigger gearsets is absolutely true, all the torque in the world doesn't mean squat if the gearset can't hold up. I will be testing the Futaba 9152 digital which is sized between a standard case and 1/4 scale at approx. 50mm. It does have the bigger gearset but also a larger output shaft that requires a servo arm different from what the typical Futaba servo uses.

 

[julianconde]

Hitec 5755MG digital servo thats the only way

 

[Shane Bastick]

If 1/4 servos with larger gear trains would hold up better, would the Multiplex Rhino 1/4 with 19kg of torque @ o.17 speed be ok, as I have plenty of servos in my stash to choose from

 

[steve wood]

Hitec 5755MG digital servo thats the only way

discontinued

 

[Shane Bastick]

The larger gears and bearings in the 1/4 scale servos will take much more of a beating and wear less than the metal gears in a standard size unit. Other club members have stripped the metal gears in standard servos on occasion, that's why Futaba and HiTec offer replacement gears. If you didn't have the S9157 already I'd suggest a 1/4 scale servo, they are usually a bit cheaper too. The S9156 has 380 oz-in on 6 volts (more than enough) and costs just $120 at servo city versus $140 for the S9157.

The Futaba 9156 is not a 1/4 scale servo, the info listed on Servo City is incorrect. A typical quarter scale has a case length of approx. 59-60mm, a standard is approx. 40-41mm, the 9156 is a 40mm case. Unfortunately for reasons I don't know, Futaba has chosen to discontinue the large 1/4 scale servos. What has been said by others regarding the strength of the bigger gearsets is absolutely true, all the torque in the world doesn't mean squat if the gearset can't hold up. I will be testing the Futaba 9152 digital which is sized between a standard case and 1/4 scale at approx. 50mm. It does have the bigger gearset but also a larger output shaft that requires a servo arm different from what the typical Futaba servo uses.

Just had a look at my 9152 servo, as you said a little smaller than normal 1/4 scale, 20kg of power and quite fast, could be a contender

 

[dwilfong]

http://www.servodatabase.com/servos/all

Here you go every thing you would ever need to know.

David

 

[Rick Pirrone]

hi shane

this what we use in a twin infact we use these in most riggers http://www.hobbyking.com/hobbyking/store/__9809__Hitec_HS_7955TG_Titanium_Gear_Digital_Servo_18kg_65g_0_19sec.html

cheers rick

 

[Shane Bastick]

hi shane

this what we use in a twin infact we use these in most riggers http://www.hobbyking...5g_0_19sec.html

cheers rick

Thanks Rick

the 7955 servo looks good, certainly wouldn't buy it from hobby king though

 

[Chris Wood]

rick

you don't have any issues with the standard gear sizes?? all i hear from twin guys is 1/4 is the way to go as the DRIVE TRAIN is bigger.. but i am looking at it as hear in the future 1/4 scale will be gone.. i don't think they use or sell that many?? i could be wrong though

chris

 

[julianconde]

Hitec 5755MG digital servo thats the only way

discontinued

well i have 4 of them lol

 

[dwilfong]

Hitec 5755MG digital servo thats the only way

discontinued

well i have 4 of them lol

Plenty of those dinos for sale on EBay

 

[julianconde]

never had issues with them and been running it for 2 years