Go Back  RCU Forums > RC Airplanes > 3D Flying!
 Servo torque help >

Servo torque help

Community
Search
Notices
3D Flying! Our 3D flying forum is the ultimate resource for 3D flyers. Also discuss the latest in "4D" flying!

Servo torque help

Thread Tools
 
Search this Thread
 
Old 08-05-2010 | 01:08 PM
  #1  
Thread Starter
Member
 
Joined: Mar 2008
Posts: 85
Likes: 0
Received 0 Likes on 0 Posts
From: Richmond Hill, ON, CANADA
Default Servo torque help

I am building a DLE 55cc gas plane (Sbach342).

I have (2) HS7955TG and (2) HS7985MG....the 7955TG have 333oz and the 7985MG have 178oz....so now the question....would you put the higher torque on the ALE or the ELE.....I already have 333oz on RUD.

Any suggestions would be helpful.

Many thanks
Old 08-05-2010 | 02:17 PM
  #2  
ThumbSkull's Avatar
Senior Member
My Feedback: (57)
 
Joined: Mar 2008
Posts: 1,111
Likes: 0
Received 0 Likes on 0 Posts
From: Greenwood, IN
Default RE: Servo torque help

Put your strongest on the rudder, weakest on the ailerons.
All yours are strong enough though.
Old 08-05-2010 | 02:21 PM
  #3  
exeter_acres's Avatar
Senior Member
My Feedback: (2)
 
Joined: Sep 2004
Posts: 7,457
Likes: 0
Received 0 Likes on 0 Posts
From: Johns Creek, GA
Default RE: Servo torque help

I'm assuming one servo for each rudder half?

In that case, 7985 on each rudder half and then the 7955's on the aileron.
Old 08-05-2010 | 02:33 PM
  #4  
BarracudaHockey's Avatar
My Feedback: (11)
 
Joined: Jul 2003
Posts: 28,247
Received 443 Likes on 362 Posts
From: Jacksonville, FL
Default RE: Servo torque help

You mean Elevator half Curtis?
Old 08-05-2010 | 02:34 PM
  #5  
exeter_acres's Avatar
Senior Member
My Feedback: (2)
 
Joined: Sep 2004
Posts: 7,457
Likes: 0
Received 0 Likes on 0 Posts
From: Johns Creek, GA
Default RE: Servo torque help

LOL...you mean the rudder doesn't have two halves??


Ooops!!!

Yep, I did mean the elevator halves...


sheesh

so picky!

Old 08-05-2010 | 02:46 PM
  #6  
BarracudaHockey's Avatar
My Feedback: (11)
 
Joined: Jul 2003
Posts: 28,247
Received 443 Likes on 362 Posts
From: Jacksonville, FL
Default RE: Servo torque help

I thought maybe you knew about a twin boom P-38 SBach!

Nappy, you're going to love this plane.
Old 08-05-2010 | 03:22 PM
  #7  
Thread Starter
Member
 
Joined: Mar 2008
Posts: 85
Likes: 0
Received 0 Likes on 0 Posts
From: Richmond Hill, ON, CANADA
Default RE: Servo torque help


ORIGINAL: exeter_acres

I'm assuming one servo for each rudder half?

In that case, 7985 on each rudder half and then the 7955's on the aileron.
yes it is split ELE...so that is 178oz on each side. My thoughts are that ALE has larger surface area, so put more torque there....however, when doing hi-alpha or waterfall, it would be nice to have all that torque on ELE...I don't think the ALE will take same abuse as ELE...
Old 08-05-2010 | 03:48 PM
  #8  
ThumbSkull's Avatar
Senior Member
My Feedback: (57)
 
Joined: Mar 2008
Posts: 1,111
Likes: 0
Received 0 Likes on 0 Posts
From: Greenwood, IN
Default RE: Servo torque help

The reality is that because the ailerons are easily effective, the airframe won't impart much load on them.
Another way to say it is that it's easier to roll the plane than turn it.
The surface area is not the determining factor.
Old 08-05-2010 | 04:21 PM
  #9  
Thread Starter
Member
 
Joined: Mar 2008
Posts: 85
Likes: 0
Received 0 Likes on 0 Posts
From: Richmond Hill, ON, CANADA
Default RE: Servo torque help


ORIGINAL: ThumbSkull

The reality is that because the ailerons are easily effective, the airframe won't impart much load on them.
Another way to say it is that it's easier to roll the plane than turn it.
The surface area is not the determining factor.
thanks, this makes sense...ALE input doesn't change direction of centerline of the plane...Newtons law, objects travel in straight lines, whereas RUD and ELE change direction and counter this inertia....so I think I now have my answer now and will put 178oz on ALE...just rely on grade 12 physics !!
Old 08-09-2010 | 06:36 PM
  #10  
Member
 
Joined: Jul 2010
Posts: 47
Likes: 0
Received 0 Likes on 0 Posts
From: Champaign , IL
Default RE: Servo torque help

put boost tabs on her and you will have no problems!

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are On



Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2026 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.