What servo for twin OS .21 OB setup ??

[racejunkie538]

Hi all

Like to know if someone off you have experience with servo's for a OS .21 OB setup.

I use 645MG for single OS OB and works very well. OK, it's easy to say 'why not double your torq' ??

but I like to use standard size servo in this twin setup.

Best from Hitech HS 985MG with 172 oz./in on 6v. You guy's think that will do the job ??

Thanks for comment.

Rgrds

Marc

 

[RonShaw]

Go digital and titanium. Not just the torque needed for turning but to handle the stress of a high speed flip. I like the 7955tg for my 20 tunnels and the 7990tg for my 40 and up tunnels. Good luck.

 

[Kevin Krogness]

I believe but not sure,, maybe PM Kris Flynn as I think he had a twin OS outboard. If that is all you are gaining I'd stay with the 645 or look for a different servo or brand to atleast get you over 200.

 

[julianconde]

get a good digital high torque titanium gear servo like mr shaw said you will be fine. 440 pushrods will help also.. just my opinion

 

[rumrunner]

You need over 250 oz of torque if not I will hook , my buddy Terry's shaman with twin os 21 on it has 333oz torque it a hitec rock crawler servo .

 

[Danny King]

What hull type are you putting them on? I did a few twin 45 outboard setups and always used 2 servos. I did strip the gears a cpl times. I don't think you need as much tongue as you need gear strength in a wreck.

 

[mrgary]

Hi all

Like to know if someone off you have experience with servo's for a OS .21 OB setup.

I use 645MG for single OS OB and works very well. OK, it's easy to say 'why not double your torq' ??

but I like to use standard size servo in this twin setup.

Best from Hitech HS 985MG with 172 oz./in on 6v. You guy's think that will do the job ??

Thanks for comment.

Rgrds

Marc

hitech hs7955tg--330 ozs on 6v,,all in a standard size servo

 

[Grimracer]

This Futaba servo has a 8mm spline.. metal gears and over 300inoz..

Price is in the 45 dollar range too!

But that 8mm spine is the key.

http://www.gpdealera.com/cgi-bin/wgainf100p.pgm?I=FUTM0021

Grim

 

[racejunkie538]

What hull type are you putting them on? I did a few twin 45 outboard setups and always used 2 servos. I did strip the gears a cpl times. I don't think you need as much tongue as you need gear strength in a wreck.

Hull is an 38 inch x-cat type boat. http://www.intlwater...opic=51050&st=0

http://i11.photobuck...zpsd9e45c92.jpg

http://i11.photobuck...zpse059a60e.jpg

http://i11.photobuck...zpsd3b39647.jpg

Rgrds Marc

 

[Danny King]

I was asking because the set up would handle a lot better with the motors locked into a straight position and a rudder. You could put the motors right behind the sponsons and a rudder right in the middle. Not sure if you are trying to keep it realistic in appearance. But it would handle a lot better.

Also can u post a pic of the boat with the motor mounted?

 

[racejunkie538]

Danny

Indeed I like to keep it in realistic appearance, so that means steering with the outboards.

As soon as I have the boat in my possesion (they are still under construction in the UK) I will take some pics.

Like to thank you all for comment, I think I will go for the Hitech 7955tg.

Rgrds Marc