RCU Forums - View Single Post - Servo torque (physics question)
View Single Post
Old 08-05-2003 | 07:59 AM
  #18  
Sprink's Avatar
Sprink
Senior Member
 
Joined: Apr 2003
Posts: 2,235
Likes: 0
Received 0 Likes on 0 Posts
From: London, UNITED KINGDOM
Default Servo torque (physics question)

Mglavin, servo resolution does not affect torque, it is that they are affected by the same thing.

If say your tranny has max ATV of 100%, and the servo moves 60 degrees ath that 100% setting, then reduing the ATV to 50% will mean that you only get 30 degrees travel out of the servo.

If you then set up the servo and control horn links to give the same deflection at the control surface as before you get the following:

a) 50% resolution: only half of the servo movement giving the same throw means you are missing the possible resolution of the other 50% you are not using.

b) 50% less torque: to get the same movement at the control surface, you will move from say 1:1 relationship to a 1:0.5 relationship. If you originally had 100oz-in, you will now only have 50oz-in at the control surface.

So, they do not relate to each other, but derive from the same source, which gives a misleading link between them.